1. The Dynamic contribution of chronic conditions to temporal trends in disability among U.S. adults
- Author
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Audrey N. Beck, Shih-Fan Lin, and Brian Karl Finch
- Subjects
Adult ,Male ,Gerontology ,Aging ,Chronic condition ,Activities of daily living ,National Health and Nutrition Examination Survey ,Cross-sectional study ,Comorbidity ,Article ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Risk Factors ,Activities of Daily Living ,Humans ,Medicine ,Disabled Persons ,Obesity ,030212 general & internal medicine ,Mobility Limitation ,Young adult ,Aged ,030505 public health ,business.industry ,Arthritis ,Age Factors ,Public Health, Environmental and Occupational Health ,General Medicine ,Middle Aged ,Nutrition Surveys ,medicine.disease ,United States ,Cross-Sectional Studies ,Chronic Disease ,Cohort ,Female ,0305 other medical science ,business - Abstract
Background Although evidence has shown that U.S. late-life disability has been declining, studies have also suggested that there has been an increase in chronic diseases between 1984 and 2007. Objectives To further illuminate these potentially contradictory trends, we explicate how the contribution of chronic conditions changes across four common types of disability (ADL, IADL, mobility disability, and functional limitations) by age (A), period (P), and birth cohorts (C) among adults aged 20 and above. Methods Our data came from seven cross-sectional waves of the National Health and Nutrition Examination Survey (NHANES). We utilize a cross-classified random effect model (CCREM) to simultaneously estimate age, period, and cohort trends for each disability. Each chronic condition was sequentially then simultaneously added to our base models (sociodemographics only). Reductions in predicted probability from the base model were then calculated for each chronic condition by each temporal dimension (A/P/C) to assess the contribution of each chronic condition. Results There was increasing age-based contribution of chronic conditions to all disabilities. The period-based contribution remained quite stagnant across years while cohort-based contributions showed a continual decline for recent cohorts. Arthritis showed the greatest contribution to disability of all types which was followed by obesity. Cancer was the least important contributor to disabilities. Conclusion Although chronic conditions are becoming less disabling across recent cohorts, other competing risk factors might suggest prevailing causes of disability.
- Published
- 2016