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Tea Consumption and Cognitive Performance in the Very Old

8. september 2017 opdateret af: Newcastle University

Higher Tea Consumption is Associated With Better Performance on Measures of Attention and Psychomotor Speed in the Very Old: The Newcastle 85+ Study

Studies have found a beneficial effect of tea consumption on the reduction of risk of cognitive impairment and dementia in older aged populations. However, there is a paucity of data on these associations in the very old defined as individuals aged 85 years and over. Therefore, we hypothesized that higher tea consumption was associated with better global and domain-specific cognitive function. We investigated the relationship between tea consumption in the very old and measures of global cognitive function, memory, attention and psychomotor speed.

The Newcastle 85+ Study was a longitudinal (5-years), population-based cohort study of individuals aged 85+ years in North East England, United Kingdom. The final sample included 676 community-dwelling and institutionalized men and women recruited through general medical practices.

Baseline tea consumption was assessed through a 2x24-hr multiple pass recall and longitudinal measures of global and domain specific (memory, speed and attention) cognitive function through the standardized mini-mental state examination and the cognitive drug research system. Linear mixed models, controlling for demographic (e.g. age, sex and education) and health variables were used to determine whether tea consumption was protective against cognitive decline.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

1042

Kontakter og lokationer

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Studiesteder

Deltagelseskriterier

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Berettigelseskriterier

Aldre berettiget til at studere

85 år til 85 år (Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Community-dwelling and institutionalized men and women recruited through general medical practices in North East England, UK (n=676) and born in 1921 (85 years old at baseline).

Beskrivelse

Inclusion Criteria:

  • Born in 1921
  • Permanently registered with a participating general practice in Newcastle upon Tyne or North Tyneside primary care trusts in the UK

Exclusion Criteria:

  • End-stage illness
  • Individuals who might pose a safety risk to a nurse visiting alone, with dementia
  • Clinical diagnosis of dementia at baseline

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
low to moderate tea consumption
consumption of 0.4 to 4.6 cups of tea (200 ml) per day (n=463)
Assess the global and domain specific (memory, speed and attention) cognitive function at baseline and over 5 years in the high vs. low/moderate tea consumption groups
High tea consumption
consumption of 4.6 to 11.9 cups of tea (200 ml) per day (n=213)
Assess the global and domain specific (memory, speed and attention) cognitive function at baseline and over 5 years in the high vs. low/moderate tea consumption groups

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Standardized mini-mental state examination
Tidsramme: Baseline
Measure of global cognition (Score 0-30)
Baseline
Rate of decline of the standardized mini-mental state examination
Tidsramme: Baseline to 5 years follow-up
Measure of global cognition (Score 0-30)
Baseline to 5 years follow-up

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Simple reaction time
Tidsramme: Baseline
Simple reaction time assessed using the Cognitive Drug Research (CDR) computerised system. The CDR tasks were presented on a hi-resolution Windows-based laptop computer (Motion Computing LE1600 Tablet PC with keyboard accessory) and participants responded using a two-button (NO/YES) response box. The participant is instructed to press "YES" as quickly as possible every time the word "YES" is presented on the screen. In total, 30 "YES" stimuli are presented with varying inter-stimulus interval. (ms)
Baseline
Rate of reaction speed decline
Tidsramme: Baseline to 3 years follow-up
Simple reaction time assessed using the Cognitive Drug Research (CDR) computerised system. The CDR tasks were presented on a hi-resolution Windows-based laptop computer (Motion Computing LE1600 Tablet PC with keyboard accessory) and participants responded using a two-button (NO/YES) response box.The participant is instructed to press "YES" as quickly as possible every time the word "YES" is presented on the screen. In total, 30 "YES" stimuli are presented with varying inter-stimulus interval. (ms)
Baseline to 3 years follow-up
Choice reaction time
Tidsramme: Baseline
Choice reaction time assessed using the Cognitive Drug Research (CDR) computerised system. The CDR tasks were presented on a hi-resolution Windows-based laptop computer (Motion Computing LE1600 Tablet PC with keyboard accessory) and participants responded using a two-button (NO/YES) response box. Either the word "YES" or "NO" is presented on the screen and the participant is instructed to press the corresponding button as quickly as possible. There are 30 trials for each stimulus word, which is chosen randomly with equal probability, with varying inter-stimulus interval. (ms)
Baseline
Rate of reaction choice decline
Tidsramme: Baseline to 3 years follow-up
Choice reaction time assessed using the Cognitive Drug Research (CDR) computerised system. The CDR tasks were presented on a hi-resolution Windows-based laptop computer (Motion Computing LE1600 Tablet PC with keyboard accessory) and participants responded using a two-button (NO/YES) response box.Either the word "YES" or "NO" is presented on the screen and the participant is instructed to press the corresponding button as quickly as possible. There are 30 trials for each stimulus word, which is chosen randomly with equal probability, with varying inter-stimulus interval. (ms)
Baseline to 3 years follow-up
Digit vigilance task
Tidsramme: Baseline
Digit vigilance task assessed using the Cognitive Drug Research (CDR) computerised system. The CDR tasks were presented on a hi-resolution Windows-based laptop computer (Motion Computing LE1600 Tablet PC with keyboard accessory) and participants responded using a two-button (NO/YES) response box. Target digit is randomly selected and constantly displayed to the right of the screen. A series of digits (0-9) are presented in the centre of the screen at the rate of 150 per minute. The participant is required to press the "YES" button as quickly as possible every time the digit in the series matches the target digit. There are 300 digits in the series and the task lasts for 2 minutes. (ms)
Baseline
Rate of digit vigilance task decline
Tidsramme: Baseline to 3 years follow-up
Digit vigilance task assessed using the Cognitive Drug Research (CDR) computerised system. The CDR tasks were presented on a hi-resolution Windows-based laptop computer (Motion Computing LE1600 Tablet PC with keyboard accessory) and participants responded using a two-button (NO/YES) response box. Target digit is randomly selected and constantly displayed to the right of the screen. A series of digits (0-9) are presented in the centre of the screen at the rate of 150 per minute. The participant is required to press the "YES" button as quickly as possible every time the digit in the series matches the target digit. There are 300 digits in the series and the task lasts for 2 minutes. (ms)
Baseline to 3 years follow-up
Word recognition
Tidsramme: Baseline
Word recognition was assessed using the Cognitive Drug Research (CDR) computerised system. The CDR tasks were presented on a hi-resolution Windows-based laptop computer (Motion Computing LE1600 Tablet PC with keyboard accessory) and participants responded using a two-button (NO/YES) response box. A list of words is presented on screen for the subject to remember. Immediately after the presentation the subject is asked to recall as many words as possible. 20 minutes later, the same list of words is presented with added distracter words. For each word, the subject is asked to indicate whether or not it belongs o the original list by pressing 'YES' or 'NO'.
Baseline
Rate of word recognition decline
Tidsramme: Baseline to 3 years follow-up
Word recognition was assessed using the Cognitive Drug Research (CDR) computerised system. The CDR tasks were presented on a hi-resolution Windows-based laptop computer (Motion Computing LE1600 Tablet PC with keyboard accessory) and participants responded using a two-button (NO/YES) response box.A list of words is presented on screen for the subject to remember. Immediately after the presentation the subject is asked to recall as many words as possible. 20 minutes later, the same list of words is presented with added distracter words. For each word, the subject is asked to indicate whether or not it belongs to the original list by pressing 'YES' or 'NO'.
Baseline to 3 years follow-up

Samarbejdspartnere og efterforskere

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Sponsor

Efterforskere

  • Ledende efterforsker: Tom Kirkwood, Newcastle University

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. juni 2006

Primær færdiggørelse (Faktiske)

1. marts 2013

Studieafslutning (Faktiske)

1. marts 2013

Datoer for studieregistrering

Først indsendt

14. august 2017

Først indsendt, der opfyldte QC-kriterier

8. september 2017

Først opslået (Faktiske)

12. september 2017

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

12. september 2017

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

8. september 2017

Sidst verificeret

1. september 2017

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • UNewcastle

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-delingsadgangskriterier

Data request

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