Table 5

Estimated odds ratios (OR) and 95% confidence intervals (CI) of disability in walking, stair climbing, and running according to age and survey period* among men (n=758) and women (n=1033)

TaskPredictorMen OR (95% CI)Women OR (95% CI)
*The GEE model with age (continuous variable) and survey period (categorical variable) as predictors. †Age, OR for one year’s difference in age. ‡Study period, ORs for other periods compared with the 1981 period (=reference category; OR=1.00).
WalkingAge (y)†1.09 (1.07 to 1.12)1.10 (1.08 to 1.12)
Period (age)‡
    1981 (39–63)1.001.00
    1990 (48–72)1.21 (0.88 to 1.65)1.15 (0.91 to 1.46)
    1996 (54–78)1.17 (0.80 to 1.71)0.94 (0.70 to 1.23)
Stair climbingAge (y)†1.10 (1.08 to 1.13)1.09 (1.07 to 1.11)
Period (age)‡
    1981 (39–63)1.001.00
    1990 (48–72)0.58 (0.45 to 0.76)0.63 (0.52 to 0.77)
    1996 (54–78)0.47 (0.33 to 0.66)0.60 (0.45 to 0.78)
RunningAge (y)†1.12 (1.10 to 1.15)1.11 (1.09 to 1.13)
Period (age)‡
    1981 (39–63)1.001.00
    1990 (48–72)0.63 (0.49 to 0.81)0.60 (0.48 to 0.76)
    1996 (54–78)0.63 (0.45 to 0.88)0.60 (0.44 to 0.82)