Abstract
PurposeTo explore the correlations between waist circumference, body mass index, calf circumference (CC), and waist-calf circumference ratio (WCR) and activities of daily living (ADLs) and instrumental activities of daily living (IADLs) in Hainan centenarians.Patients and MethodsA total of 1,002 Hainan centenarians were selected by full sample household survey. ADLs and IADLs were used to investigate the ability of activity and instrumental activity in daily living. The possible non-linear associations were further analyzed using restricted cubic spline.ResultsAfter adjusting for demographic characteristics (gender, age, ethnicity, marital status, educational level, and type of residence) and lifestyle (smoking, drinking, and exercise), the odds ratio (OR) of CC (continuous variable) on ADL disability in centenarians was 0.90 (95% CI: 0.85–0.96), while high WCR (continuous variable) was related with high risk of ADL disability (OR=1.73; 95% confidence interval[CI], 1.07–2.80). The ORs of CC and WCR for IADL severe disability were 0.86 (95% CI, 0.82–0.91) and 2.23 (95% CI, 1.52–3.28), respectively.ConclusionCentral (WCR) and peripheral (CC) adiposity had different effects on disability (ADL and IADL) in centenarians. Even in centenarians, maintaining muscle mass (with higher calf circumference) and avoiding central obesity are of positive significance for the prevention of ADL/IADL disability.
Highlights
Population aging is the inevitable trend accompanied by society and economic development
China Hainan Centenarian Cohort Study (CHCCS) baseline data were used for the present analysis
According to the list of centenarians provided by the Hainan Provincial Civil Affairs Department, from June 2014 to December 2016, a full sample household survey was conducted among all centenarians in 16 cities/counties of Hainan Province
Summary
Population aging is the inevitable trend accompanied by society and economic development. The rapid growth of the older adults is accompanied by significant medical burdens and the needs for long-term care [2, 3]. A number of studies identified several risk factors (such as physical inactivity, depression, smoking, and alcohol consumption) [5–7] of basic function decline (ADL disability) in older adults. The correlations between obesity and ADL disability were unclear and inconsistent in elderly population. The paradox said that inconsistent with the general population, the obese elderly and the obese patients with chronic diseases have better prognosis and lower disability and mortality than those with normal weight/body mass index (BMI) [8, 9]. Some other studies showed that obesity impaired or was not associated with ADLs and IADLs in elderly patients [10, 11]
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