The purpose of the present study was to determine how capabilities changed
during a 16-year follow-up, and the role of aging in the process. The study
population consisted of those who filled out all four questionnaires (n =
3815). At the baseline, in 1981, all participants were active workers with
a mean age of 50 years (range 45-58). In 1997, the respondents were mainly
retired, only 5% were still at work. The total measure of capability was co
nstructed by summing up the dimensions of cognitive, psychoemotional, physi
cal, and motor capacity. The associations between capability and age, type
of work, and occupational status were estimated by general linear models. T
he results indicate that there was a strong decrease of capability in the 5
0-year-old active workers from 1985 to 1992. After that, capability began t
o rise again. This suggests that mole actions of promoting working ability
should be directed to this age group.