ArticlePloS one2014
Improving retention of very old participants in longitudinal research: experiences from the Newcastle 85+ study.
Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 2 of them syntheses that pooled it.
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Who cites it
31 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Low protein intake, physical activity, and physical function in European and North American community-dwelling older adults: a pooled analysis of four longitudinal aging cohorts.The American journal of clinical nutrition · 2021Pooled it
- Retention strategies in longitudinal cohort studies: a systematic review and meta-analysis.BMC medical research methodology · 2018Pooled it
- Article
- Who stays? Understanding the attrition in a longitudinal aging study of older Chinese immigrants in the United States.Innovation in aging · 2025Article
- Predictors of Retention in the 1Florida Alzheimer's Disease Research Center (ADRC) Over Two Waves.Journal of applied gerontology : the official journal of the Southern Gerontological Society · 2025Article
- 'It's where I belong': what does it mean to age in place from the perspective of people aged 80 and above? A longitudinal qualitative study (wave one).BMC geriatrics · 2024Article
- The Daily Experiences of Hispanic and Latinx Dementia Caregivers Study: Protocol for a Fully Remote Daily Diary Observational Cohort Study.JMIR research protocols · 2024Article
- Factors Associated with Attrition in a Longitudinal Cohort of Older Adults in the Community.Chronic obstructive pulmonary diseases (Miami, Fla.) · 2023Article
- Medication work among nonagenarians: a qualitative study of the Newcastle 85+ cohort participants at 97 years old.The British journal of general practice : the journal of the Royal College of General Practitioners · 2023Article
- The association between multimorbidity and mobility disability-free life expectancy in adults aged 85 years and over: A modelling study in the Newcastle 85+ cohort.PLoS medicine · 2022Article
- Is polypharmacy associated with mortality in the very old: Findings from the Newcastle 85+ Study.British journal of clinical pharmacology · 2022Article
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- Contribution of protein intake and its interaction with physical activity to transitions between disability states and to death in very old adults: the Newcastle 85+ Study.European journal of nutrition · 2020Article
- Dietary Selenium Intakes and Musculoskeletal Function in Very Old Adults: Analysis of the Newcastle 85+ Study.Nutrients · 2020Article
- Longer Duration of Hypertension and MRI Microvascular Brain Alterations Are Associated with Lower Hippocampal Volumes in Older Individuals with Hypertension.Journal of Alzheimer's disease : JAD · 2020Article
- Protein Intake and Disability Trajectories in Very Old Adults: The Newcastle 85+ Study.Journal of the American Geriatrics Society · 2019Article
- Prevalence and determinants of low protein intake in very old adults: insights from the Newcastle 85+ Study.European journal of nutrition · 2018Article
- Low protein intake, muscle strength and physical performance in the very old: The Newcastle 85+ Study.Clinical nutrition (Edinburgh, Scotland) · 2018Article
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Authors and funding
10 authors.
Funding
Abstract
backgroundPeople aged 85 and over are often excluded from research on the grounds of being difficult to recruit and problematic to retain. The Newcastle 85+ study successfully recruited a cohort of 854 85-year-olds to detailed health assessment at baseline and followed them up over 3 phases spanning 5 years. This paper describes the effectiveness of its retention strategies.
methodsPrimary retention strategies involved meticulous management of contact information and active maintenance of contact with participants between research visits and between phases of the study. For statistical analysis, data on post-inclusion attrition over the 3 follow-up phases was separated into 'death' and 'withdrawal' categories, with sub-categories 'health' and 'non-health' reasons created for 'withdrawal'. Multinomial logistic regression was used to determine if particular socio-demographic and health characteristics were associated with post-inclusion attrition due to withdrawal at each of the 3 phase-to-phase transition points.
resultsFor both sexes, at successive follow-up phases there was a decrease in attrition due to withdrawal and an increase due to death. Withdrawal was most prevalent between baseline and phase 2. Across the 5 years of the study total post-inclusion (post-baseline) attrition due to death accounted for a 40% (344/854) loss to cohort and total post-inclusion attrition due to withdraw a 19% (166/854) loss to cohort, with health reasons for withdrawal becoming more dominant over time. Adjusting for sex, parsimonious modelling showed only occupational class (National Statistics Socio-economic Classification) to be associated with withdrawal and only between baseline and phase 2 (routine/manual compared to managerial (OR 3.41; 95% CI [1.23 to 9.44]).
conclusionFollowing successful recruitment, we retained a high proportion of participants from a very old age group over 5 years of longitudinal research. No strong predictors of post-inclusion attrition due to withdrawal were found, suggesting the general effectiveness of our retention strategies.
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