Table 2.

Linear mixed model estimates of walking speed over time according to baseline age, and combination of low muscle strength and obesity groups

	Model 1			Model 2
	Estimate	s.e.	P	Estimate	s.e.	P
Intercept	1.90	0.33	<0.0001	1.71	0.31	<0.0001
Age	−0.014	0.004	0.002	−0.01	0.004	0.02
Time	0.009	0.06	0.89	0.009	0.06	0.89
Age × time	−0.0006	0.001	0.43	−0.0006	0.001	0.45
Neither low strength nor obesity	0.25	0.36	0.49	−0.04	0.32	0.90
Low strength	0.70	0.37	0.06	0.44	0.33	0.18
Obesity	0.27	0.41	0.51	0.03	0.37	0.93
Low strength and obesity	0			0
Age × neither low strength nor obesity	−0.0004	0.005	0.93	0.002	0.004	0.63
Age × low strength	−0.008	0.005	0.10	−0.006	0.004	0.19
Age × obesity	−0.002	0.006	0.76	0.0007	0.005	0.88
Age × low strength and obesity	0			0
Time × neither low strength nor obesity	0.15	0.07	0.02	0.15	0.07	0.03
Time × low strength	0.13	0.07	0.07	0.11	0.07	0.12
Time × obesity	0.03	0.07	0.70	0.04	0.07	0.60
Time × low strength and obesity	0			0
Age × time × neither low strength nor obesity	−0.002	0.001	0.03	−0.002	0.001	0.03
Age × time × low strength	−0.002	0.001	0.07	−0.001	0.001	0.13
Age × time × obesity	−0.0002	0.001	0.82	−0.0004	0.001	0.70
Age × time × low strength and obesity	0			0

Abbreviations: Age, age at the baseline; CRP, c-reactive protein; IL, interleukin; Time, duration of the follow-up (range 0−6 years). Model 1: unadjusted. Model 2: adjusted for sex, body height, education, physical activity, diseases (hypertension, angina pectoris, chronic heart failure, diabetes and hip osteoarthritis), IL-6 and CRP.