Table 1

Bivariate and multivariate associations between variables of interest and difficulties performing daily life movements in 1989 and then in 2012 (among those without limitation reported in 1989)

	N*	N†	Per cent	OR (crude)	OR (adjusted‡)
Difficulties performing daily life activities in 1989
Men
Perceived state of health
Good	5938	614	10.34	1.0	1.0
Fair	7358	1788	24.3	2.8 (2.5 to 3.1)	2.2 (1.9 to 2.4)
Poor	626	317	50.64	8.9 (7.4 to 10.6)	5.4 (4.5 to 6.6)
Perceived physical strain in 1989
Low	4494	610	13.57	1.0	1.0
Moderate	2827	500	17.69	1.4 (1.2 to 1.6)	1.2 (1.1 to 1.4)
High	2485	523	21.05	1.7 (1.5 to 1.9)	1.5 (1.3 to 1.8)
Very high	4092	1077	26.32	2.3 (2.0 to 2.5)	2.1 (1.8 to 2.3)
Age (continuous, in 1989)				1.0 (1.0 to 1.1)	1.0 (1.0 to 1.1)
Women
Perceived state of health
Good	1999	214	10.71	1.0	1.0
Fair	2771	737	26.6	3.0 (2.6 to 3.6)	2.3 (1.9 to 2.8)
Poor	238	140	58.82	11.9 (8.9 to 16.0)	7.9 (5.7 to 11.0)
Perceived physical strain in 1989
Low	1143	222	19.42	1.0	1.0
Moderate	976	223	22.85	1.2 (1.0 to 1.5)	1.1 (0.8 to 1.4)
High/very high	1540	442	28.7	1.7 (1.4 to 2.0)	1.6 (1.3 to 2.1)
Age (continuous, in 1989)				1.1 (1.1 to 1.1)	1.1 (1.0 to 1.1)

	N*	N†	Per cent	OR (crude)	OR (adjusted§)

Difficulties performing daily life activities in 2012
Men
Perceived state of health
Good	3486	324	9.29	1.0	1.0
Fair	3352	483	14.41	1.6 (1.4 to 1.9)	1.6 (1.4 to 1.8)
Poor	147	38	25.85	3.4 (2.3 to 5.0)	3.2 (2.1 to 4.7)
Perceived physical strain sum, divided into categories, 1989–2012
Low	2693	277	10.29	1.0	1.0
Moderate	2126	258	12.14	1.2 (1.0 to 1.4)	1.2 (1.0 to 1.4)
High	1414	174	12.31	1.2 (1.0 to 1.5)	1.1 (0.9 to 1.4)
Very high	752	136	18.09	1.9 (1.5 to 2.4)	1.7 (1.4 to 2.2)
Age (continuous, in 1989)				1.0 (1.0 to 1.1)	1.0 (1.0 to 1.1)
Women
Perceived state of health
Good	1111	108	9.72	1.0	1.0
Fair	1179	181	15.35	1.7 (1.3 to 2.2)	1.6 (1.2 to 2.0)
Poor	51	13	25.49	3.2 (1.6 to 6.1)	2.7 (1.4 to 5.2)
Perceived physical strain sum, divided into categories, 1989–2012
Low	1160	119	10.26	1.0	1.0
Moderate	698	99	14.18	1.4 (1.1 to 1.9)	1.3 (1.0 to 1.8)
High/very high	483	84	17.39	1.8 (1.4 to 2.5)	1.6 (1.2 to 2.2)
Age (continuous, in 1989)				1.1 (1.0 to 1.1)	1.1 (1.0 to 1.1)

Bold characters (except titles)=p<0.05.
*N=number of participants.
†n=number of participants with difficulties performing daily life activities.
‡Adjusted on age, perceived state of health, perceived physical strain in 1989.
§Adjusted on age, perceived state of health, perceived physical strain sum, divided into categories, 1989–2012.