Dataset Information

Functional Impairment and Decline in Middle Age: A Cohort Study.

ABSTRACT: Background:Difficulties with daily functioning are common in middle-aged adults. However, little is known about the epidemiology or clinical course of these problems, including the extent to which they share common features with functional impairment in older adults. Objective:To determine the epidemiology and clinical course of functional impairment and decline in middle age. Design:Cohort study. Setting:The Health and Retirement Study. Participants:6874 community-dwelling adults aged 50 to 56 years who did not have functional impairment at enrollment. Measurements:Impairment in activities of daily living (ADLs), defined as self-reported difficulty performing 1 or more ADLs, assessed every 2 years for a maximum follow-up of 20 years, and impairment in instrumental ADLs (IADLs), defined similarly. Data were analyzed by using multistate models that estimate probabilities of different outcomes. Results:Impairment in ADLs developed in 22% of participants aged 50 to 64 years, in whom further functional transitions were common. Two years after the initial impairment, 4% (95% CI, 3% to 5%) of participants had died, 9% (CI, 8% to 11%) had further ADL decline, 50% (CI, 48% to 52%) had persistent impairment, and 37% (CI, 35% to 39%) had recovered independence. In the 10 years after the initial impairment, 16% (CI, 14% to 18%) had 1 or more episodes of functional decline and 28% (CI, 26% to 30%) recovered from their initial impairment and remained independent throughout this period. The pattern of findings was similar for IADLs. Limitation:Functional status was self-reported. Conclusion:Functional impairment and decline are common in middle age, as are transitions from impairment to independence and back again. Because functional decline in older adults has similar features, current interventions used for prevention in older adults may hold promise for those in middle age. Primary Funding Source:National Institute on Aging and National Center for Advancing Translational Sciences through the University of California, San Francisco, Clinical and Translational Sciences Institute.

SUBMITTER: Brown RT

PROVIDER: S-EPMC5716833 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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Functional Impairment and Decline in Middle Age: A Cohort Study.

Brown Rebecca T RT Diaz-Ramirez L Grisell LG Boscardin W John WJ Lee Sei J SJ Steinman Michael A MA

Annals of internal medicine 20171031 11

<h4>Background</h4>Difficulties with daily functioning are common in middle-aged adults. However, little is known about the epidemiology or clinical course of these problems, including the extent to which they share common features with functional impairment in older adults.<h4>Objective</h4>To determine the epidemiology and clinical course of functional impairment and decline in middle age.<h4>Design</h4>Cohort study.<h4>Setting</h4>The Health and Retirement Study.<h4>Participants</h4>6874 comm ...[more]

PMID: 29132150

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Project description:BackgroundDiet, in particular the Mediterranean diet, has been associated with better cognitive function and less cognitive decline in older populations.ObjectivesTo quantify associations of a healthy diet, defined by adherence to either the Mediterranean diet, the WHO guidelines, or Dutch Health Council dietary guidelines, with cognitive function and cognitive decline from middle age into old age.MethodsFrom the Doetinchem Cohort Study, a large population-based longitudinal study, 3644 participants (51% females) aged 45-75 y at baseline, were included. Global cognitive function, memory, processing speed, and cognitive flexibility were assessed at 5-y time intervals up to 20-y follow-up. Adherence to the Mediterranean diet was measured with the modified Mediterranean Diet Score (mMDS), adherence to the WHO dietary guidelines with the Healthy Diet Indicator (HDI), and adherence to the Dutch Health Council dietary guidelines 2015 with the modified Dutch Healthy Diet 2015 index (mDHD15-index). The scores on the dietary indices were classified in tertiles (low, medium, high adherence). Linear mixed models were used to model level and change in cognitive function by adherence to healthy diets.ResultsThe highest tertiles of the mMDS, HDI, and mDHD15-index were associated with better cognitive function compared with the lowest tertiles (P values <0.01), for instance at age 65 y equal to being 2 y cognitively younger in global cognition. In addition, compared with the lowest tertiles, the highest tertiles of the mMDS, HDI, and mDHD15-index were statistically significantly associated with 6-7% slower global cognitive decline from age 55 to 75 y, but also slower decline in processing speed (for mMDS: 10%; 95% CI: 2, 18%; for mDHD15: 12%; 95% CI: 6, 21%) and cognitive flexibility (for mDHD15: 10%; 95% CI: 4, 18%).ConclusionsHealthier dietary habits, determined by higher adherence to dietary guidelines, are associated with better cognitive function and slower cognitive decline with aging from middle age onwards.

Project description:ImportanceDifficulty performing daily activities such as bathing and dressing ("functional impairment") affects nearly 15% of middle-aged adults. Older adults who develop such difficulties, often because of frailty and other age-related conditions, are at increased risk of acute care use, nursing home admission, and death. However, it is unknown if functional impairments that develop among middle-aged people, which may have different antecedents, have similar prognostic significance.ObjectiveTo determine whether middle-aged individuals who develop functional impairment are at increased risk for hospitalization, nursing home admission, and death.Design, setting, and participantsThis matched cohort study analyzed longitudinal data from the Health and Retirement Study, a nationally representative prospective cohort study of US adults. The study population included 5540 adults aged 50 to 56 years who did not have functional impairment at study entry in 1992, 1998, or 2004. Participants were followed biennially through 2014. Individuals who developed functional impairment between 50 and 64 years were matched by age, sex, and survey wave with individuals without impairment as of that age and survey wave. Statistical analysis was conducted from March 15, 2017, to December 11, 2018.ExposuresImpairment in activities of daily living (ADLs), defined as self-reported difficulty performing 1 or more ADLs, and impairment in instrumental ADLs (IADLs), defined similarly.Main outcomes and measuresThe 3 primary outcomes were time from the first episode of functional impairment (or matched survey wave, in controls) to hospitalization, nursing home admission, and death. Follow-up assessments occurred every 2 years until 2014. Competing risks survival analysis was used to assess the association of functional impairment with hospitalization and nursing home admission and Cox proportional hazards regression analysis was used to assess the association with death.ResultsOf the 5540 study participants (2739 women and 2801 men; median age, 53.7 years [interquartile range, 52.3-55.2 years]), 1097 (19.8%) developed ADL impairment between 50 and 64 years, and 857 (15.5%) developed IADL impairment. Individuals with ADL impairment had an increased risk of each adverse outcome compared with those without impairment, including hospitalization (subhazard ratio, 1.97; 95% CI, 1.77-2.19), nursing home admission (subhazard ratio, 2.62; 95% CI, 1.99-3.45), and death (hazard ratio, 2.06; 95% CI, 1.74-2.45). After multivariable adjustment, the risks of hospitalization (subhazard ratio, 1.54; 95% CI, 1.36-1.75) and nursing home admission (subhazard ratio, 1.73; 95% CI, 1.24-2.43) remained significantly higher among individuals with ADL impairment, but the risk of death was not statistically significant (hazard ratio, 1.06; 95% CI, 0.85-1.32). Individuals with IADL impairment had an increased risk of all 3 outcomes in adjusted and unadjusted analyses.Conclusions and relevanceSimilar to older adults, middle-aged adults who develop functional impairment appear to be at increased risk for adverse outcomes. Even among relatively young people, functional impairment has important clinical implications.

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Project description:Vision and hearing impairments are known to increase in middle age. In this study we describe the prevalence of vision impairment and dual sensory impairment in UK adults aged 40-69 years in a very large and recently ascertained data set. The associations between vision impairment, age, sex, socioeconomic status, and ethnicity are reported.This research was conducted using the UK Biobank Resource, with subsets of UK Biobank data analysed with respect to self-report of eye problems and glasses use. Better-eye visual acuity with habitually worn refractive correction was assessed with a logMAR chart (n = 116,682). Better-ear speech reception threshold was measured with an adaptive speech in noise test, the Digit Triplet Test (n = 164,770). Prevalence estimates were weighted with respect to UK 2001 Census data.Prevalence of mild visual impairment (VA >0.1 logMAR (6/7.5, 20/25) and ?0.48 (6/18, 20/60)) and low vision (VA >0.48 (6/18, 20/60) and ?1.3 (6/120, 20/400)) was estimated at 13.1% (95% CI 12.9-13.4) and 0.8% (95% CI 0.7-0.9), respectively. Use of glasses was 88.0% (95% CI 87.9-88.1). The prevalence of dual sensory impairment was 3.1% (95% CI 3.0-3.2) and there was a nine-fold increase in the prevalence of dual sensory problems between the youngest and oldest age groups. Older adults, those from low socioeconomic and ethnic minority backgrounds were most at risk for vision problems.Mild vision impairment is common in middle aged UK adults, despite widespread use of spectacles. Increased likelihood of vision impairment with older age and with ethnic minorities is of concern given ageing and more ethnically diverse populations. Possible barriers to optometric care for those from low socioeconomic and ethnic minority backgrounds may require attention. A higher than expected prevalence of dual impairment suggests that hearing and vision problems share common causes. Optometrists should consider screening for hearing problems, particularly among older adults.

Dataset Information

Functional Impairment and Decline in Middle Age: A Cohort Study.

Publications

Functional Impairment and Decline in Middle Age: A Cohort Study.

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