BELAND, F. Predictors of functional status in older people living at home. Age and Ageing. 1999, 28, 153-159
BRESLOW, L. Persistence of health habits and their relationship to mortality. Preventive Medicine. 1980, 9, 469-483
CHO, CY. The association between chronic illness and functional change among participants in a comprehensive geriatric assessment program. J Am Geriatr Soc. 1998, 46, 6, 677-682
CRIMMINS, EM. Differentials in active life expectancy in the older population of the United States. J Gerontol. 1996, 51B, 3, s111-s120