Table 3

Univariate regression analyses: adjusted OR for back and lower extremity pain limiting work ability, with individual and rated health factors

	Back					Lower extremity
	n	Cases (%)	OR*	95% CI	p Value	n	Cases n (%)	OR*	95% CI	p Value
Individual factors
Age (years)
≤21	84	13 (15)	1.00			91	33 (36)	1.00
22–26	57	10 (18)	1.15	0.47 to 2.84	0.763	58	18 (31)	0.80	0.39 to 1.61	0.525
≥27	60	30 (50)	5.60	2.55 to 12.26	0.000	61	27 (44)	1.37	0.70 to 2.67	0.361
BMI (continuous)	200	52 (26)	1.14	1.01 to 1.28	0.035	209	78 (37)	0.98	0.87 to 1.09	0.655
Body height (m)
≤1.80	82	25 (30)	2.77	1.10 to 6.99	0.031	86	32 (37)	1.32	0.63 to 2.75	0.461
1.81–1.85	51	7 (14)	1.00			52	16 (31)	1.00
≥1.86	68	21 (31)	2.83	1.09 to 7.34	0.033	72	30 (42)	1.59	0.75 to 3.38	0.228
Rated health factors
Physical training (days/week)
≤1	24	13 (54)	4.30	1.69 to 10.92	0.002	27	9 (33)	0.81	0.33 to 1.98	0.641
2–4	102	22 (22)	1.00			103	39 (38)	1.00
≥5	74	17 (23)	1.08	0.53 to 2.22	0.826	79	29 (37)	0.97	0.53 to 1.79	0.933
Aerobic fitness training (h/week)
<0.3	60	19 (32)	1.25	0.58 to 2.66	0.571	67	24 (36)	0.95	0.48 to 1.88	0.891
0.3–3.0	73	20 (27)	1.00			80	30 (38)	1.00
>3.0	57	13 (23)	0.79	0.35 to 1.8	0.571	49	19 (39)	1.09	0.52 to 2.26	0.828
Muscular strength training (h/week)
<1.5	61	20 (33)	1.58	0.74 to 3.39	0.242	67	20 (30)	0.51	0.25 to 1.02	0.056
1.5–3.5	72	17 (24)	1.00			76	34 (45)	1.00
>3.5	66	16 (24)	1.04	0.47 to 2.27	0.931	65	24 (37)	0.70	0.36 to 1.39	0.311
Mental component summary
≤51.40	70	24 (34)	1.42	0.97 to 2.99	0.360	65	24 (37)	0.74	0.37 to 1.50	0.400
51.41–54.74	58	11 (19)	0.63	0.27 to 1.50	0.300	71	22 (31)	0.58	0.29 to 1.17	0.127
>54.75	63	17 (27)	1.00			67	29 (43)	1.00

Adjusted OR with corresponding 95% CI and significance level (p value) for back (lumbar and thoracic) and lower extremity (hip, knee and foot) pain limiting work ability.
*Adjusted for comorbidity (non-musculoskeletal).