Table 3

Proportion (%) of disability in stair climbing by gender, birth cohort, and survey period (n=758 men, n=1033 women)

	Men			Women
Cohort (age in 1981)	1981	1990	1996	1981	1990	1996
*Persons aged 54 to 58 years in 1981 and 1996 (and persons aged 53 to 57 years in 1990). †Persons aged 59 to 63 years in 1981 and 1996 (and persons aged 58 to 62 years in 1990).
V (39–43)	8	16	24*	23	30	41*
IV (44–48)	18	30*	35†	34	47*	53†
III (49–53)	28	37†	39	43	50†	60
II (54–58)	47*	44	60	53*	53	70
I (59–63)	45†	53	68	65†	70	82
Total number of respondents	590	681	727	806	913	970