TABLE 2.

Non-response and attrition analyses.

	Non-response analysis				Attrition analysis
	N	%	OR	95% CI	N	%	OR	95% CI
Sex
Female	6478	51.2			4733	52.8	1.09	0.99–1.20
Male	6174	48.8	–	–	4232	47.2	–	–
Total	12652	100.0			8965	100
Age
<35	2638	20.9	–	–	1740	19.4	–	–
35–55	7837	61.9	0.82	0.74–0.91	5742	64.0	0.78	0.69–0.87
>55	2177	17.2	1.10	0.97–1.26	1483	16.5	0.89	0.76–1.04
Skill level
>15	3408	26.9	–		2438	27.2	–	–
13–15	3126	24.7	0.82	0.73–0.92	2334	26.0	1.55	1.36–1.77
10–12	4895	38.7	1.35	1.22–1.49	3214	35.9	1.65	1.45–1.87
<10	127	1.0	1.84	1.26–2.67	71	0.8	1.86	1.13–3.08
Uspesifisert	7096	8.7	0.53	0.43–0.62	908	10.1	0.80	0.65–0.98
Workplace
Public sector	9914	78.4	–	–	6995	78.0	–	–
Private sector	2738	21.6	0.86	0.78–0.95	1790	22.0	1.19	1.07–1.33
Organizational change
No change					3184	35.5	–	–
One change					3310	36.9	1.05	0.94–1.18
Two or more changes					2471	27.6	1.09	0.97–1.23

Non-response analysis and attrition analysis. Non-response defined as not completing work factor items at baseline. Attrition defined as completing work factor items baseline, but not at follow-up. The bold significance values are p < 0.05.