Trends in Incidence of Disability in Activities of Daily Living in Chinese Older Adults: 1993-2006.
OBJECTIVE
To investigate time trends in incidence of activity of daily living (ADL) disability of Chinese older adults and to explore factors potentially contributing to trends.


METHODS
Population-based prospective study using a multistage, randomized, cluster sampling process.


METHODS
Nine provinces of China.


METHODS
Three consecutive cohorts of people aged 60 and older from the China Health and Nutrition Survey: cohort 1993-2000 (n = 831), cohort 1997-2004 (n = 1,091), cohort 2000-2006 (n = 1,152).


METHODS
Disability in ADLs was defined as inability to perform at least one of five self-care activities (transferring, dressing, toileting, bathing, feeding). Data were analyzed using Cox and generalized estimating equation models.


RESULTS
The incidence (per 1,000 person-years) of ADL disability decreased significantly from 35.3 in 1993-2000 and 28.9 in 1997-2004 to 24.3 in 2000-2006 in Chinese older adults (Ptrend< .001). The incidence of ADL disability decreased significantly in men and women, in young-old adults (aged 60-74), and in those living in rural areas (all Ptrend≤ .02) after controlling for multiple potential influential factors. Of the five ADL items, decline in incidence of disability was significant in transferring (Ptrend< .001) and bathing (Ptrend= .002) and marginally significant in toileting (Ptrend= .06) but stable in dressing (Ptrend= .38) and feeding (Ptrend= .26).


CONCLUSIONS
The incidence of ADL disability decreased from 1993 to 2006 in older adults in China, especially in transferring and bathing, independent of sociodemographic, lifestyle, and chronic health conditions.
Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet-Stockholm University, Stockholm, Sweden.
Yajun
Y
Liang
Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet-Stockholm University, Stockholm, Sweden.|Karolinska University Hospital, Stockholm, Sweden.
Anna-Karin
AK
Welmer
Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet-Stockholm University, Stockholm, Sweden.
Rui
R
Wang
School of Public Health, Jining Medical University, Shandong, China.
Aiqin
A
Song
Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet-Stockholm University, Stockholm, Sweden.|Stockholm Gerontology Research Center, Stockholm, Sweden.
Laura
L
Fratiglioni
Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet-Stockholm University, Stockholm, Sweden.
Chengxuan
C
Qiu
D000203:Activities of Daily Living; D000368:Aged; D044466:Asian People; D002681:China / Q000453:epidemiology; D004185:Disability Evaluation; D006233:Persons with Disabilities / Q000706:statistics & numerical data*; D004522:Educational Status; D005260:Female; D015577:Geriatric Assessment; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012424:Rural Population / Q000706:statistics & numerical data
China; activities of daily living; elderly; incidence; trend
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