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Measuring Smoking Behaviors While Using Varenicline

2014년 12월 15일 업데이트: Andrew Strasser, University of Pennsylvania

Assessment of Smoking Topography and Behaviors During Response to Varenicline

This study will demonstrate the behavioral responses to varenicline, helping to better understand its mechanisms. Hypotheses for the study are to observe decreases in smoking topography and nicotine cigarette choice on varenicline, relative to placebo; and decreases on day 21 relative to day 7 during varenicline treatment. We also propose to examine if extended duration of treatment has clinical significance in decreasing smoking behaviors, thus increasing the efficacy of varenicline.

연구 개요

상태

완전한

개입 / 치료

상세 설명

This study is designed to examine the behavioral responses a cigarette smoker may have to using varenicline. Behavioral responses may help to better understand its mechanisms which in turn could improve treatment outcomes. The primary hypothesis for the study is to observe decreases in smoking topography, an objective measure of smoking behavior or puffing, on varenicline, relative to placebo; and decreases on day 21 relative to day 7 during varenicline treatment. We will also examine puffing and nicotine cigarette choices during lab visits at baseline, and Days 7 and 21. We also propose to examine if extended duration of treatment has clinical significance in decreasing smoking behaviors, thus potentially increasing the efficacy of varenicline.

연구 유형

중재적

등록 (실제)

48

단계

  • 4단계

연락처 및 위치

이 섹션에서는 연구를 수행하는 사람들의 연락처 정보와 이 연구가 수행되는 장소에 대한 정보를 제공합니다.

연구 장소

    • Pennsylvania
      • Philadelphia, Pennsylvania, 미국, 19104
        • Tobacco Use Research Center

참여기준

연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.

자격 기준

공부할 수 있는 나이

21년 (성인, 고령자)

건강한 자원 봉사자를 받아들입니다

연구 대상 성별

모두

설명

Inclusion Criteria:

  • self report minimum 10 daily cigarettes
  • self report smoking every day past 5 years
  • between the ages 21-65
  • self report intention to try to quit smoking in the next 6 months

Exclusion Criteria:

  • self reported use of any nicotine-containing products other than non-menthol cigarettes
  • self reported history or current treatment of substance abuse (other than nicotine dependence)
  • self reported alcohol use greater than 25 standard drinks per week;
  • currently pregnant, planned pregnancy or lactating (females: negative urine pregnancy screen)
  • self reported history or current diagnosis of any Axis 1 disorders except past depression
  • self reported serious or unstable disease within past year
  • self reported history of epilepsy or seizure disorder;
  • self reported history or current diagnosis of COPD (chronic obstructive pulmonary disease), cardiovascular disease, heart attack, or uncontrolled hypertension
  • self reported kidney function impairment
  • any current or recent (30 day) use of: smoking cessation medications, anti-psychotics, anti-depressants, anti-anxiety, panic medications, stimulants or opiate-containing medications
  • less than 5 years of daily smoking
  • any medical condition or concomitant medication that could compromise participant safety or treatment
  • provide a baseline carbon monoxide (CO) reading < 10 ppm
  • self reported use of non filtered cigarettes
  • inability to provide informed consent or complete any of the study tasks as determined by the Principal Investigator and/or Study Physician

공부 계획

이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.

연구는 어떻게 설계됩니까?

디자인 세부사항

  • 주 목적: 치료
  • 할당: 무작위
  • 중재 모델: 크로스오버 할당
  • 마스킹: 더블

무기와 개입

참가자 그룹 / 팔
개입 / 치료
실험적: Varenicline before placebo

Drug (Varenicline (Chantix)): Placebo

Intervention to be administered is: participants will receive standard dosing regimen of Varenicline for 21 days total, followed by 14-day washout and 21 days of placebo. Standard dosing: 0.5 mg days 1-3; 0.5 mg bid days 4-7; 1.0 mg bid days 8-21.

Intervention Drug (Varenicline (Chantix) will be administered in standard dosing in pill format: 0.5 mg days 1-3; 0.5 mg bid daily days 4-7; 1.0 mg bid daily days 8-21.
다른 이름들:
  • 챈틱스
실험적: Placebo then Varenicline

Placebo: Drug Varenicline (Chantix)

Intervention to be administered is: participants will receive 21 days of placebo, followed by 14-day washout and standard dosing regimen of Varenicline for 21 days total. Standard dosing: 0.5 mg days 1-3; 0.5 mg bid days 4-7; 1.0 mg bid days 8-21.

Intervention 'Drug (Varenicline (Chantix)): Placebo'

Intervention Drug (Varenicline (Chantix) will be administered in standard dosing in pill format: 0.5 mg days 1-3; 0.5 mg bid daily days 4-7; 1.0 mg bid daily days 8-21.
다른 이름들:
  • 챈틱스

연구는 무엇을 측정합니까?

주요 결과 측정

결과 측정
측정값 설명
기간
Smoking Topography: Total Puff Volume
기간: Days 1-21 of each of 2 study periods
Total puff volume was created by summing all of the puffs from the cigarette smoked in the lab at each time point (each lab visit). This value represents the total volume of smoke extracted from a single cigarette and it a standard measure of smoking behavior. A total puff volume represents the total smoking volume from a cigarette. Values are reported in milliliters. Value of interest is the average puff volume across all sessions for all participants in a group and is reported as a key measure of smoking behavior. Analyses were repeated measures analysis of variance where individual, time and drug were within factors.
Days 1-21 of each of 2 study periods
The Number of Choices of a Nicotine Containing Cigarette Compared to a Non-nicotine Cigarette.
기간: Days 1, 7, 21 of each of two 21 day study periods
Participants were given 4 puff choices (between a nicotine containing and de-nicotinized cigarette) on 6 study visits, for a total of 24 choices. Number of puffs reported is average across both study periods.
Days 1, 7, 21 of each of two 21 day study periods
Daily Cigarette Consumption
기간: Two 21 day study periods
Average of the number of cigarettes smoked per day
Two 21 day study periods

2차 결과 측정

결과 측정
측정값 설명
기간
Total Nicotine Metabolites From Urine Samples
기간: Samples from Day 1 and Day 21 of two 21 day Periods
Total urinary metabolites from urine samples collected at Day 1 and Day 21
Samples from Day 1 and Day 21 of two 21 day Periods
Nicotine Levels From Urine Samples
기간: Samples from Day 1 and Day 21 of two 21 day Periods
Nicotine levels from urine samples collected at Day 1 and Day 21.
Samples from Day 1 and Day 21 of two 21 day Periods
Cotinine Levels From Urine Samples
기간: Samples from Day 1 and Day 21 of two 21 day Periods
Cotinine levels from urine samples collected at Day 1 and Day 21.
Samples from Day 1 and Day 21 of two 21 day Periods
Carbon Monoxide Levels
기간: Samples from Day 1 and Day 21 of two 21 day Periods
Exhaled breath carbon monoxide levels collected at Day 1 and Day 21 sessions. Alveolar carbon monoxide is a validated assessment of smoke exposure.
Samples from Day 1 and Day 21 of two 21 day Periods
Subjective Measures to Assess Smoking Urges
기간: Days 21 of each of the two 21-day study periods, range 1(low)-7(high)
Craving for cigarettes was assessed with the 32-item Questionnaire of Smoking Urges (QSU) during each study visit. In order to calculate the QSU measure, each item is rated on a Likert-type scale from 1 (strongly disagree) to 7 (strongly agree). The values are then summed to create a single total score. Well validated 2 factor subscale scores were also created by summing the item scores for the 2 factors: Factor 1 reflects the desire to smoke for pleasure and Factor 2 reflects urges to smoke to relieve withdrawal-related negative affect. Internal consistency for each scale across all time points was high (Cronbach's α > 0.95, 0.85, and 0.95 for Factor 1, Factor 2, and QSU total, respectively). Scale range is 1-7 where 1 is low urge to smoke and 7 represents high urge to smoke. Data was collected at each time point but outcome measure of interest is end of period.
Days 21 of each of the two 21-day study periods, range 1(low)-7(high)

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협력자

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연구 기록 날짜

이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.

연구 주요 날짜

연구 시작

2009년 1월 1일

기본 완료 (실제)

2010년 11월 1일

연구 완료 (실제)

2010년 11월 1일

연구 등록 날짜

최초 제출

2009년 7월 28일

QC 기준을 충족하는 최초 제출

2009년 7월 28일

처음 게시됨 (추정)

2009년 7월 29일

연구 기록 업데이트

마지막 업데이트 게시됨 (추정)

2014년 12월 16일

QC 기준을 충족하는 마지막 업데이트 제출

2014년 12월 15일

마지막으로 확인됨

2014년 12월 1일

추가 정보

이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .

Varenicline에 대한 임상 시험

구독하다