Analyzing musculoskeletal neck pain, measured as present pain and periods of pain, with three different regression models: a cohort study

Table 5 Poisson models – analyses of number of years with pain.

Explanatory variables from baseline	Exposed cases	Simple model		Adjusted model
	(Y>0)	Rate ratio	P-value	Rate ratio	P-value	95% CI
Women/men	245	1.7	< 0.001	1.6	< 0.001	1.37; 1.79
Overweight	36	0.95	0.525
Breakfast regularly	280	0.83	0.015	0.96	0.612	0.809; 1.13
Snuff use	9	0.84	0.126	1.0	0.824	0.856; 1.21
Smoking	23	1.4	0.045	1.2	0.210	0.862; 1.78
Physical activity		0.99	0.158	1.0	0.926	0.988; 1.01
High work/study demands (ref: not too high)	189		0.004		0.047
Not affecting home life	92	1.0		0.94		0.822; 1.08
Affecting home life	67	1.4		1.3		0.998, 1.58
High home life demands	21	1.4	0.039	1.1	0.532	0.802; 1.51
Work/study time		1.00	0.746
Good relationship with superiors	327	0.80	0.099	0.87	0.321	0.652; 1.17
Good relationship with colleagues	322	0.88	0.284
Computer use pattern (ref: 0)	185		0.003		0.024
One 4 h period without a break	53	1.2		1.1		0.953; 1.36
At least two 4 h periods without a break	110	1.2		1.2		1.04; 1.37
Asthma	36	1.4	0.006	1.3	0.102	0.934; 1.69
Perceived stress	239	1.4	< 0.001	1.3	< 0.001	1.17; 1.51

All rate ratios are adjusted for gender (using men as the reference category). For the adjusted odds ratios both p-values and 95% confidence intervals (CI) are presented. The total number of respondents varied between N = 677 – 801, because of incomplete data.

ISSN: 1471-2474