Table 2.

OR for mobility limitations according to exposure to cumulative years of lifting through working life measured as ton-years (CI: confidence interval)

	Men	Unadjusted (n = 4996)			Model 1 (n = 4800)			Model 2 (n = 4786)			Model 3 (n = 4514)
	N	OR	95% CI		OR	95% CI			95% CI			95% CI
Walking
0 ton-years	2033	1 (ref)			1 (ref)			1 (ref)			1 (ref)
> 0–2 ton-years	285	0.917	0.496	1.695	0.995	0.537	1.842	0.841	0.444	1.592	0.759	0.388	1.484
> 2–10 ton-years	873	2.338	1.727	3.166	2.434	1.796	3.300	1.779	1.289	2.454	1.391	0.974	1.985
> 10–20 ton-years	625	2.547	1.837	3.530	2.595	1.870	3.600	1.813	1.281	2.565	1.373	0.935	2.015
> 20 ton-years	984	3.232	2.449	4.265	3.228	2.444	4.262	1.977	1.468	2.662	1.807	1.311	2.491
Running
0 ton-years	2033	1 (ref)			1 (ref)			1 (ref)			1 (ref)
> 0–2 ton-years	285	1.027	0.753	1.401	1.115	0.816	1.524	0.967	0.691	1.353	0.898	0.630	1.281
> 2–10 ton-years	873	1.839	1.536	2.203	1.921	1.601	2.305	1.506	1.234	1.837	1.300	1.050	1.609
> 10–20 ton-years	625	2.200	1.806	2.681	2.257	1.850	2.755	1.752	1.409	2.180	1.430	1.131	1.810
> 20 ton-years	984	2.530	2.136	2.995	2.544	2.146	3.015	1.724	1.429	2.081	1.484	1.213	1.816
Climbing stairs
0 ton-years	2033	1 (ref)			1 (ref)			1 (ref)			1 (ref)
> 0–2 ton-years	285	1.659	1.129	2.436	1.810	1.229	2.664	1.625	1.075	2.456	1.516	0.976	2.353
> 2–10 ton-years	873	2.555	2.020	3.231	2.670	2.108	3.381	2.022	1.568	2.608	1.702	1.291	2.245
> 10–20 ton-years	625	2.897	2.250	3.729	2.966	2.301	3.822	2.210	1.681	2.905	1.899	1.414	2.551
> 20 ton-years	984	4.141	3.345	5.128	4.163	3.359	5.159	2.775	2.199	3.502	2.596	2.024	3.332

	Women	Unadjusted (n = 2247)			Model 1 (n = 2165)			Model 2 (n = 2165)			Model 3 (n = 1993)
	N	OR	95% CI		OR	95% CI			95% CI			95% CI
Walking
0 ton-years	1152	1 (ref)			1 (ref)			1 (ref)			1 (ref)
> 0–2 ton-years	188	1.894	1.093	3.282	2.088	1.199	3.635	1.526	0.829	2.808	1.514	0.781	2.937
> 2–10 ton-years	379	2.410	1.609	3.610	2.628	1.746	3.955	1.764	1.122	2.772	1.791	1.098	2.920
> 10–20 ton-years	228	3.922	2.564	6.000	4.077	2.656	6.257	2.253	1.407	3.610	1.895	1.122	3.201
> 20 ton-years	218	2.317	1.419	3.781	2.313	1.414	3.785	1.659	0.970	2.838	1.591	0.905	2.796
Running
0 ton-years	1152	1 (ref)			1 (ref)			1 (ref)			1 (ref)
> 0–2 ton-years	188	1.021	0.724	1.438	1.120	0.791	1.584	0.861	0.583	1.270	0.787	0.511	1.212
> 2–10 ton-years	379	1.326	1.034	1.701	1.443	1.121	1.858	1.063	0.800	1.413	1.057	0.776	1.438
> 10–20 ton-years	228	2.299	1.720	3.074	2.403	1.791	3.226	1.438	1.033	2.001	1.292	0.897	1.859
> 20 ton-years	218	1.599	1.182	2.163	1.604	1.181	2.179	1.239	0.880	1.743	1.103	0.762	1.596
Climbing stairs
0 ton-years	1152	1 (ref)			1 (ref)			1 (ref)			1 (ref)
> 0–2 ton-years	188	0.999	0.656	1.522	1.090	0.713	1.666	0.773	0.479	1.248	0.776	0.462	1.302
> 2–10 ton-years	379	1.638	1.233	2.177	1.777	1.332	2.371	1.277	0.921	1.769	1.301	0.916	1.847
> 10–20 ton-years	228	2.428	1.762	3.346	2.522	1.824	3.487	1.407	0.974	2.033	1.392	0.933	2.079
> 20 ton-years	218	1.690	1.194	2.392	1.691	1.191	2.400	1.241	0.839	1.836	1.180	0.779	1.787

Walking: limitations in walking 400 m without resting. Dichotomized to “no difficulty” or “little or much difficulty or not able at all”. No difficulty is used as reference group

Running: limitations in running 100 m. Dichotomized “not limited at all” and “limited a little/a lot”. Not limited is used as reference group

Climbing stairs: limitations in climbing stairs to the second floor. Dichotomized to “not limited at all” and “limited a little/a lot”. Not limited is used as reference group

Ton-years: amount of lifting during working life. One ton year is lifting 1000 kg each day in one year

Model 1: including age. Model 2: Model 1 and chronic diseases and pain. Model 3: Model 2 and life style factors