Vurder indflydelsen af nikotinflux og nikotinform på subjektive effekter relateret til afhængighed
Nikotinflux, et potentielt kraftfuldt værktøj til regulering af nikotinlevering fra elektroniske cigaretter: Nikotinfluxens betydning for hastigheden af nikotinlevering og subjektiv effekt
Electronic nicotine delivery systems (ENDS) heat and vaporize a nicotine-containing liquid to produce an aerosol that can deliver nicotine to the blood and the brain. ENDS use has increased rapidly in the last decade, especially among youth: over 20% of US high school students are current ENDS users, and there is evidence of nicotine dependence in this population. Federal legislation has been proposed that would restrict ENDS liquid nicotine concentration to make ENDS "significantly less addictive and appealing to youth." However, these and other efforts to curb addiction by limiting nicotine liquid concentration are unlikely to succeed because nicotine emissions from ENDS depend on multiple variables. To achieve the intended public health aims, regulations targeting addiction must focus on nicotine delivery, not nicotine concentration. While nicotine delivery cannot be regulated directly, the rate at which an ENDS emits nicotine, the "nicotine flux", can be regulated and, importantly, predicted based on a few device design and operating variables. However, to date there is no empirical evidence demonstrating the relationship between flux and delivery, nor between flux and the subjective effects that support nicotine dependence. Closing this gap is essential for providing an effective framework for regulating ENDS. At the American University of Beirut, the investigators will assess the relationship between nicotine flux, form, and subjective effects. Participants will use ENDS devices with varying nicotine fluxes and forms. Dependency measures, such as urge to smoke, craving, and abstinence, will be assessed. The outcome will indicate the degree to which nicotine flux/form influence subjective effects related to dependency, puffing intensity, and exposure to toxicants. In summary, this project will provide the empirical evidence needed for public health agencies to use nicotine flux as an encompassing and convenient construct to regulate nicotine delivery from ENDS.
Studieoversigt
Status
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
Assess the influence of nicotine flux and nicotine form on subjective effects. At AUB, the investigators will assess subjective effects (e.g. product liking, nicotine craving) and puffing topography for 130 participants who will undergo 5 ENDS use sessions (combinations 1-5) consisting of 2 bouts (10 puffs + 60min ad libitum) with 2 fluxes (15 and 35μg/s) x 2 forms (protonated, freebase) and a 0 nicotine condition. In addition, the investigators will use a state-of-the-art device to sample in situ a fraction of the aerosol generated during each puff to verify actual nicotine flux and form, and measure exposure to pulmonary toxicants (carbonyls). The investigators hypothesize that increasing nicotine flux and protonated nicotine will result in greater reductions of nicotine craving, and lower puffing intensity and carbonyl exposure. 10 of the participants that completed AIM 2 will be asked to attend our lab at AUB for one additional visit, where they will be assigned either a high flow or low flow ENDS. During the visit, participants will undertake three smoking bouts consisting of 10 puffs each, where they will be presented with alternating puffs of the assigned device in which a specific ENDS design variable is systematically varied between puffs. Puff topography, inhalation behavior, and subjective effects related to sensory feedback will be recorded. We hypothesize that power and liquid composition variations will result in immediate and reversible changes in puffing/inhalation behavior.
Undersøgelsestype
Tilmelding (Faktiske)
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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Beirut
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Beirut, Beirut, Libanon, 11-0236
- American University of Beirut
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Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Must be healthy and above 18 years of age
- Must be willing to provide informed consent, attend the lab, and abstain from tobacco/nicotine as required (participants will be instructed to abstain from nicotine/tobacco and/or ENDS use for ≥12h)
- A dual ENDS and tobacco user who reports daily use of ENDS (≥ 3 mg/ml nicotine) or cigarettes (any frequency) AND someday use (≥ 3 days/week) of ENDS (≥ 3 mg/ml nicotine) or cigarettes (any frequency) for the past 3 months or longer
Exclusion Criteria:
- History of chronic disease or an uncontrolled psychiatric condition
- History of or active cardiovascular disease, low/high blood pressure, seizures, regular use of a prescription medication (except vitamins/birth control)
- Past month use of cocaine, opioids, benzodiazepines, or methamphetamines
- Individuals who report using marijuana >15/30 days
- Women will be excluded if they are breast-feeding or pregnant
- Participants intending to quit tobacco/nicotine use in the next 30 days and referred to cessation treatment
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Andet
- Tildeling: Randomiseret
- Interventionel model: Crossover opgave
- Maskning: Dobbelt
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
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Eksperimentel: Combination One - 15μg/s protonated nicotine flux
The investigators will test the subjective effects of nicotine flux (15μg/s) coupled with one ratio of nicotine form (100% protonated). Following a one-hour observation period, participants will use Subox Mini C in a 10-puff directed (30sec inter-puff interval) bout. One hour after the first bout, participants will be instructed to puff on the device for 60-min ad libitum. Subjective measures (i.e., nicotine dependence, drug effects, product liking, and craving) will be administered 5 times/session: 5 min before and 5 min after onset of the directed bout and 5 min before, halfway into and 5 min after onset of the ad libitum bout. |
30/70 propylene glycol/vegetable glycerin ratio with nicotine concentration 4mg/ml protonated |
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Eksperimentel: Combination Two - 35μg/s protonated nicotine flux
The investigators will test the subjective effects of nicotine flux (35μg/s) coupled with one ratio of nicotine form (100% protonated). Following a one-hour observation period, participants will use Subox Mini C in a 10-puff directed (30sec inter-puff interval) bout. One hour after the first bout, participants will be instructed to puff on the device for 60-min ad libitum. Subjective measures (i.e., nicotine dependence, drug effects, product liking, and craving) will be administered 5 times/session: 5 min before and 5 min after onset of the directed bout and 5 min before, halfway into and 5 min after onset of the ad libitum bout. |
30/70 PG/VG ratio with nicotine concentration 10mg/ml protonated |
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Eksperimentel: Combination Three - 15μg/s free base nicotine flux
The investigators will test the subjective effects of nicotine flux (15μg/s) coupled with one ratio of nicotine form (100% free base). Following a one-hour observation period, participants will use Subox Mini C in a 10-puff directed (30sec inter-puff interval) bout. One hour after the first bout, participants will be instructed to puff on the device for 60-min ad libitum. Subjective measures (i.e., nicotine dependence, drug effects, product liking, and craving) will be administered 5 times/session: 5 min before and 5 min after onset of the directed bout and 5 min before, halfway into and 5 min after onset of the ad libitum bout. |
30/70 PG/VG ratio with nicotine concentration 4mg/ml free base |
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Eksperimentel: Combination Four - 35μg/s free base nicotine flux
The investigators will test the subjective effects of nicotine flux (35μg/s) coupled with one ratio of nicotine form (100% free base). Following a one-hour observation period, participants will use Subox Mini C in a 10-puff directed (30sec inter-puff interval) bout. One hour after the first bout, participants will be instructed to puff on the device for 60-min ad libitum. Subjective measures (i.e., nicotine dependence, drug effects, product liking, and craving) will be administered 5 times/session: 5 min before and 5 min after onset of the directed bout and 5 min before, halfway into and 5 min after onset of the ad libitum bout. |
30/70 PG/VG ratio with nicotine concentration 10mg/ml freebase |
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Placebo komparator: Placebo - Combination Five - 0μg/s nicotine flux
The investigators will test the subjective effects of nicotine flux (0μg/s) placebo. Following a one-hour observation period, participants will use Subox Mini C in a 10-puff directed (30sec inter-puff interval) bout. One hour after the first bout, participants will be instructed to puff on the device for 60-min ad libitum. Subjective measures (i.e., nicotine dependence, drug effects, product liking, and craving) will be administered 5 times/session: 5 min before and 5 min after onset of the directed bout and 5 min before, halfway into and 5 min after onset of the ad libitum bout. |
30/70 PG/VG ratio with nicotine concentration 0mg/ml (placebo) |
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Eksperimentel: Combination six - 0μg/s flux; high power/low power
The investigators will test the subjective effects (perceived mouthful, perceived draw effort, and throat hit) at two power levels (20W and 40 W) with no nicotine in the liquid. Participants will alternate 10 directed puffs (30sec inter-puff interval) between two Subox Mini C devices differing only by the two power levels. Subjective measures will be administered following puff pairs 1&2, 5&6, and 9&10. |
30/70 PG/VG ratio with nicotine concentration 0mg/ml |
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Eksperimentel: Combination seven - 35μg/s flux; high power/low power
The investigators will test the subjective effects (perceived mouthful, perceived draw effort, and throat hit) at two power levels (20W and 40 W) and a constant nicotine flux of 35 ug/s. Participants will alternate 10 directed puffs (30sec inter-puff interval) between two Subox Mini C devices (20 W; 8mg/ml and 40 W;4 mg/ml). Subjective measures will be administered following puff pairs 1&2, 5&6, and 9&10. |
e-liquid 7: 30/70 PG/VG ratio with nicotine concentration 4mg/ml protonated e-liquid 8: 30/70 PG/VG ratio with nicotine concentration 8mg/ml protonated |
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Eksperimentel: Combination eight - 15μg/s flux; high PG(propylene glycol)/VG(vegetable glycerin) / low PG/VG
The investigators will test the subjective effects (perceived mouthful, perceived draw effort, and throat hit) at two propylene glycol/vegetable glycerin ratios (30/70 and 70/30). Participants will alternate 10 directed puffs (30sec inter-puff interval) between two Subox Mini C devices differing only by the two PG/VG ratios. Subjective measures will be administered following puff pairs 1&2, 5&6, and 9&10. |
e-liquid 9: 30/70 PG/VG ratio with nicotine concentration 4mg/ml protonated e-liquid 10: 70/30 PG/VG ratio with nicotine concentration 4mg/ml protonated |
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Subjective Effects - Strong Flavor (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Strong flavor will be assessed by the Electronic Cigarette Specific Effects questionnaire, general labeled magnitude scale (gLMS) on a subjective scale (0-10, No sensation - Strongest Imaginable), with higher scores indicating a stronger perceived flavor. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Harshness/Irritancy (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Harshness/irritancy will be assessed by the Electronic Cigarette Specific Effects questionnaire, general labeled magnitude scale (gLMS) on a subjective scale (0-10, No sensation - Strongest Imaginable), with higher scores indicating harsher/more irritating effects. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Throat Hit (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Throat hit will be assessed by the Electronic Cigarette Specific Effects questionnaire, general labeled magnitude scale (gLMS) on a subjective scale (0-10, No sensation - Strongest Imaginable), with higher scores indicating a stronger throat hit. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Overall Like: Flavor (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Overall like: flavor will be assessed by the Electronic Cigarette Specific Effects questionnaire, general labeled hedonic scale (LHS) on a subjective scale (0-10, most disliked - most liked), with higher scores indicating the flavor was liked more. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Overall Like: Harshness (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Overall like: harshness will be assessed by the Electronic Cigarette Specific Effects questionnaire, general labeled hedonic scale (LHS) on a subjective scale (0-10, most disliked - most liked), with higher scores indicating the harshness was liked more. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Overall Like: Throat Hit (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Overall like: throat hit will be assessed by the Electronic Cigarette Specific Effects questionnaire, general labeled hedonic scale (LHS) on a subjective scale (0-10, most disliked - most liked), with higher scores indicating the throat hit was liked more. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Overall Like: Warmth (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Overall like: warmth will be assessed by the Electronic Cigarette Specific Effects questionnaire, general labeled hedonic scale (LHS) on a subjective scale (0-10, most disliked - most liked), with higher scores indicating the warmth was liked more. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Satisfying (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Satisfying will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating greater satisfaction. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Pleasant (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Pleasant will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating greater pleasantness. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Taste Good (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Taste good will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating better taste. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Calm (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Calm will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating feeling calmer. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Concentrate (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Concentrate will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating better ability to concentrate. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Awake (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Awake will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating feeling more awake/alert. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Reduce Hunger (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Reduce hunger will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating greater reduction in hunger. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Dizzy (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Dizzy will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating greater dizziness. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Feeling Sick (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Feeling sick will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating feeling more sick. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Want it Right Now (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Want it right now will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating a stronger immediate desire for the product. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Smell (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Smell will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating a stronger perceived smell. This item is drawn from the Electronic Cigarette Specific Effects Questionnaire, a modified/expanded version of the modified Cigarette Evaluation Questionnaire (mCEQ; Cappelleri et al., 2007) developed for ENDS. Participants rate the item on a 0-10 scale immediately following each bout. Item wording: 'Did the e-cig produce a smell?' (0 = not at all, 10 = extremely). |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Visible Vapor (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Visible vapor will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating more visible vapor. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Importance Vapor (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Importance vapor will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating vapor visibility mattered more to the participant. This item is drawn from the Electronic Cigarette Specific Effects Questionnaire, a modified/expanded version of the modified Cigarette Evaluation Questionnaire (mCEQ; Cappelleri et al., 2007) developed for ENDS. Participants rate the item on a 0-10 scale immediately following each bout. Item wording: 'Is the vapor/cloud of the e-cig important to you?' (0 = not at all, 10 = extremely). |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Subjective Effects - Puffs Similar (Combinations 1-5)
Tidsramme: Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Puffs similar will be assessed by the Electronic Cigarette Specific Effects questionnaire and consists of 1 item scored 0 - 10 with 0 being not at all and 10 being extremely, with higher scores indicating the puffs were perceived as more similar to the participant's usual product. |
Post Bout 1: assessed 5 minutes after onset of the directed 10-puff bout (average bout duration ~5 minutes). Post Bout 2: assessed 5 minutes after onset of the 60-minute ad libitum bout.
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Smoking Urges - Brief Factor 1 (Intention/Desire)
Tidsramme: Assessed before and after the directed bout (Bout 1), and before, midway through, and after the ad libitum bout (Bout 2).
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Brief Factor 1 (Intention/Desire) will be assessed by the Questionnaire of Smoking Urges-Brief (QSU-Brief; Tiffany & Drobes, 1991; Toll et al., 2006). Factor 1 is the sum of 6 items, each rated on a 0-10 scale (0=strongly disagree, 10=strongly agree), yielding a total score range of 0-60, with higher scores indicating stronger urges. |
Assessed before and after the directed bout (Bout 1), and before, midway through, and after the ad libitum bout (Bout 2).
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Smoking Urges - Brief Factor 2 (Relief of Neg. Affect)
Tidsramme: Assessed before and after the directed bout (Bout 1), and before, midway through, and after the ad libitum bout (Bout 2).
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Brief Factor 2 (Relief of Neg. Affect) will be assessed by the Questionnaire of Smoking Urges-Brief (QSU-Brief; Tiffany & Drobes, 1991; Toll et al., 2006). Factor 2 is the sum of 4 items, each rated on a 0-10 scale (0=strongly disagree, 10=strongly agree), yielding a total score range of 0-40, with higher scores indicating stronger urges. |
Assessed before and after the directed bout (Bout 1), and before, midway through, and after the ad libitum bout (Bout 2).
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Withdrawal Symptoms - Minnesota Nicotine Withdrawal Scale (MNWS; Based on Hughes and Hatsukami, 1986)
Tidsramme: Assessed before and after the directed bout (Bout 1), and before, midway through, and after the ad libitum bout (Bout 2).
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The Minnesota Nicotine Withdrawal Scale (MNWS; based on Hughes and Hatsukami, 1986 questionnaire) was measured using composite mean of MNWS items (irritability, anxiety, difficulty concentrating, restlessness, hunger/appetite, Impatient, depression, desire for sweets and craving) on a 0-10 scale (Not at all - Extremely), with higher scores indicating greater withdrawal severity. |
Assessed before and after the directed bout (Bout 1), and before, midway through, and after the ad libitum bout (Bout 2).
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Puff Duration
Tidsramme: Will be measured during the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Puff duration combination 1,2,3,4 & 5 |
Will be measured during the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Number of Puffs
Tidsramme: Will be measured during the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Measured topography Total Number of Puffs (puffs). |
Will be measured during the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Puffing Time
Tidsramme: Will be measured during the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Measured topography Average Puffing time (sec). |
Will be measured during the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Inter Puff Interval
Tidsramme: Will be measured during the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Measured topography Average Inter Puff Interval (sec). |
Will be measured during the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Flow Rate
Tidsramme: Will be measured during the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Measured topography Average Flow rate (Liters per minute: LPM). |
Will be measured during the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Mouth-level PM
Tidsramme: Will be measured after the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Mouth-level PM (Particulate matter) dose estimated using the REALTIME real-time in-situ sampling device, which collects 5% of the aerosol at the mouthpiece during each puff; values are reported as the total session dose (5% fraction × 20), in mg. |
Will be measured after the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Mouth-level Nicotine
Tidsramme: Will be measured after the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Mouth-level nicotine dose estimated using the REALTIME real-time in-situ sampling device, which collects 5% of the aerosol at the mouthpiece during each puff; values are reported as the total session dose (5% fraction × 20), in mg. |
Will be measured after the approximately 5-minute, 10-puff use bout and 60-minute, ad lib use bout
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Puff Duration - Combination 6,7 & 8
Tidsramme: Will be measured during the approximately 5-minute, 10-puff use bout
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Measured topography Average Puff Duration (sec) - using Subox mini C. Puffs were administered in alternating order using block randomization; for Combination Six, odd puffs were delivered at 20W and even puffs at 40W; for Combination Seven, odd puffs were delivered at 20W/8mg/mL and even puffs at 40W/4mg/mL; for Combination Eight, odd puffs were delivered at 30/70 PG/VG and even puffs at 70/30 PG/VG. |
Will be measured during the approximately 5-minute, 10-puff use bout
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Sensory Feedback - Perceived Mouthful - Using Kangertech Subox Mini C (Sub-ohm Device)
Tidsramme: Will be measured during the approximately 5-minute, 10-puff use bout
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The perceived mouthful will be assessed using the following question: "How would you rate the amount of smoke filling your mouth during the puff you just smoked?". A subjective visual analog scale will be used (1-5, barely any smoke- a lot of smoke) with higher scores indicating higher mouthful. Puffs were administered in alternating order using block randomization; for Combination Six, odd puffs were delivered at 20W and even puffs at 40W; for Combination Seven, odd puffs were delivered at 20W/8mg/mL and even puffs at 40W/4mg/mL; for Combination Eight, odd puffs were delivered at 30/70 PG/VG and even puffs at 70/30 PG/VG. |
Will be measured during the approximately 5-minute, 10-puff use bout
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Sensory Feedback - Perceived Draw Effort - Using Kangertech Subox Mini C (Sub-ohm Device)
Tidsramme: Will be measured during the approximately 5-minute, 10-puff use bout
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The perceived draw effort will be assessed using the following question: " How would you rate the effort needed to draw the puff you just smoked?". A subjective visual analog scale will be used (1-5, easy- hard) with higher scores indicating harder draw effort. Puffs were administered in alternating order using block randomization; for Combination Six, odd puffs were delivered at 20W and even puffs at 40W; for Combination Seven, odd puffs were delivered at 20W/8mg/mL and even puffs at 40W/4mg/mL; for Combination Eight, odd puffs were delivered at 30/70 PG/VG and even puffs at 70/30 PG/VG. |
Will be measured during the approximately 5-minute, 10-puff use bout
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Sensory Feedback - Throat Hit - Using Kangertech Subox Mini C (Sub-ohm Device)
Tidsramme: Will be measured during the approximately 5-minute, 10-puff use bout
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The perceived Throat hit will be assessed using the following question: "How would you describe the throat hit of the device you just used" (0-100 General Labeled Magnitude Scale; anchors: "barely detectable" to "strongest imaginable"). Puffs were administered in alternating order using block randomization; for Combination Six, odd puffs were delivered at 20W and even puffs at 40W; for Combination Seven, odd puffs were delivered at 20W/8mg/mL and even puffs at 40W/4mg/mL; for Combination Eight, odd puffs were delivered at 30/70 PG/VG and even puffs at 70/30 PG/VG. |
Will be measured during the approximately 5-minute, 10-puff use bout
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Samarbejdspartnere og efterforskere
Efterforskere
- Ledende efterforsker: Soha Talih, PhD, American University of Beirut Medical Center
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- American University Of Beirut
- 1R01DA052565-01A1 (U.S. NIH-bevilling/kontrakt)
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
IPD-planbeskrivelse
Participants data will not be available to other researchers
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
Studerer et amerikansk FDA-reguleret lægemiddelprodukt
Studerer et amerikansk FDA-reguleret enhedsprodukt
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