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Tea Consumption and Cognitive Performance in the Very Old

8 сентября 2017 г. обновлено: 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.

Обзор исследования

Статус

Завершенный

Условия

Вмешательство/лечение

Тип исследования

Наблюдательный

Регистрация (Действительный)

1042

Контакты и местонахождение

В этом разделе приведены контактные данные лиц, проводящих исследование, и информация о том, где проводится это исследование.

Места учебы

Критерии участия

Исследователи ищут людей, которые соответствуют определенному описанию, называемому критериям приемлемости. Некоторыми примерами этих критериев являются общее состояние здоровья человека или предшествующее лечение.

Критерии приемлемости

Возраст, подходящий для обучения

От 85 лет до 85 лет (Пожилой взрослый)

Принимает здоровых добровольцев

Да

Полы, имеющие право на обучение

Все

Метод выборки

Невероятностная выборка

Исследуемая популяция

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).

Описание

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

Учебный план

В этом разделе представлена ​​подробная информация о плане исследования, в том числе о том, как планируется исследование и что оно измеряет.

Как устроено исследование?

Детали дизайна

Когорты и вмешательства

Группа / когорта
Вмешательство/лечение
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

Что измеряет исследование?

Первичные показатели результатов

Мера результата
Мера Описание
Временное ограничение
Standardized mini-mental state examination
Временное ограничение: Baseline
Measure of global cognition (Score 0-30)
Baseline
Rate of decline of the standardized mini-mental state examination
Временное ограничение: Baseline to 5 years follow-up
Measure of global cognition (Score 0-30)
Baseline to 5 years follow-up

Вторичные показатели результатов

Мера результата
Мера Описание
Временное ограничение
Simple reaction time
Временное ограничение: 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
Временное ограничение: 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
Временное ограничение: 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
Временное ограничение: 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
Временное ограничение: 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
Временное ограничение: 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
Временное ограничение: 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
Временное ограничение: 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

Соавторы и исследователи

Здесь вы найдете людей и организации, участвующие в этом исследовании.

Спонсор

Следователи

  • Главный следователь: Tom Kirkwood, Newcastle University

Даты записи исследования

Эти даты отслеживают ход отправки отчетов об исследованиях и сводных результатов на сайт ClinicalTrials.gov. Записи исследований и сообщаемые результаты проверяются Национальной медицинской библиотекой (NLM), чтобы убедиться, что они соответствуют определенным стандартам контроля качества, прежде чем публиковать их на общедоступном веб-сайте.

Изучение основных дат

Начало исследования (Действительный)

1 июня 2006 г.

Первичное завершение (Действительный)

1 марта 2013 г.

Завершение исследования (Действительный)

1 марта 2013 г.

Даты регистрации исследования

Первый отправленный

14 августа 2017 г.

Впервые представлено, что соответствует критериям контроля качества

8 сентября 2017 г.

Первый опубликованный (Действительный)

12 сентября 2017 г.

Обновления учебных записей

Последнее опубликованное обновление (Действительный)

12 сентября 2017 г.

Последнее отправленное обновление, отвечающее критериям контроля качества

8 сентября 2017 г.

Последняя проверка

1 сентября 2017 г.

Дополнительная информация

Термины, связанные с этим исследованием

Другие идентификационные номера исследования

  • UNewcastle

Планирование данных отдельных участников (IPD)

Планируете делиться данными об отдельных участниках (IPD)?

ДА

Критерии совместного доступа к IPD

Data request

Информация о лекарствах и устройствах, исследовательские документы

Изучает лекарственный продукт, регулируемый FDA США.

Нет

Изучает продукт устройства, регулируемый Управлением по санитарному надзору за качеством пищевых продуктов и медикаментов США.

Нет

Эта информация была получена непосредственно с веб-сайта clinicaltrials.gov без каких-либо изменений. Если у вас есть запросы на изменение, удаление или обновление сведений об исследовании, обращайтесь по адресу register@clinicaltrials.gov. Как только изменение будет реализовано на clinicaltrials.gov, оно будет автоматически обновлено и на нашем веб-сайте. .

Клинические исследования Cognitive performance and cognitive decline

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