Table 3

OR and 95% CI for reporting LBP for more than 30 days in the past year at follow-up for low, medium and high levels of emotional demands, role conflicts, influence at work and quality of leadership measured at baseline (N=1040)

			Risk for LBP for more than 30 days in the past year at follow-up
			Model 1†		Model 2‡		Model 3§		Model 4¶
	At risk	Cases, n/%	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI
Emotional demands
High	241	30/12.4	2.19	1.16 to 4.14	3.02	1.47 to 6.21	2.41	1.17 to 4.96	1.56	0.71 to 3.45
Medium	569	36/6.3	1.04	0.59 to 1.85	1.51	0.79 to 2.89	1.39	0.72 to 2.68	1.18	0.60 to 2.31
Low	230	14/6.1	1	Reference	1	Reference	1	Reference	1	Reference
Role conflicts
High	291	30/10.3	2.28	1.16 to 4.49	2.13	1.02 to 4.44	1.81	0.87 to 3.75	1.27	0.60 to 2.71
Medium	482	37/7.7	1.64	0.89 to 3.05	1.67	0.87 to 3.19	1.46	0.76 to 2.80	1.27	0.65 to 2.46
Low	267	13/4.9	1	Reference	1	Reference	1	Reference	1	Reference
Influence at work
Low	238	26/10.9	6.97	2.35 to 20.70	5.95	1.91 to 18.56	4.97	1.61 to 15.41	4.16	1.36 to 12.75
Medium	570	50/8.8	5.49	1.95 to 15.46	5.10	1.81 to 14.35	4.64	1.64 to 13.14	3.93	1.37 to 11.22
High	232	4/1.7	1	Reference	1	Reference	1	Reference	1	Reference
Quality of leadership
Low	226	22/9.7	1.79	0.92 to 3.50	1.93	0.96 to 3.88	1.73	0.86 to 3.48	1.64	0.77 to 3.48
Medium	602	46/7.6	1.38	0.75 to 2.52	1.52	0.80 to 2.86	1.41	0.73 to 2.70	1.61	0.80 to 3.24
High	212	12/5.7	1	Reference	1	Reference	1	Reference	1	Reference

†Model 1: adjusted for age.
‡Model 2: model 1 plus body mass index, smoking, leisure time physical activity, tenure and job group.
§Model 3: model 2 plus physical workload (Hollmann index).
¶Model 4: model 3 plus adjustment for depressive symptom score at baseline.
LBP, low back pain.