Table 3.

Pearson correlation matrix (one-tailed)

		1	2	3	4	5	6	7	8	9	10
1.	Cervical pain
2.	Lumbar pain	0.735∗
3.	Age	0.092	0.056
4.	Smoker†	0.118	0.166‡	−0.047
5.	Sex§	0.130	0.050	−0.106	−0.005
6.	Quantitative work demands	0.344∗	0.184‡	0.105	−0.039	−0.061
7.	Degrees of freedom at work	−0.183‡	−0.164‡	0.095	−0.118	−0.125	−0.063
8.	Shift work (0 = no, 1 = yes)	0.091	0.064	0.028	−0.010	0.175‡	0.205‡	0.019
9.	Work–family conflict	0.305∗	0.307∗	0.202‡	0.014	−0.203‡	0.390∗	−0.180‡	0.138
10.	Interruptions	0.250∗	0.231∗	−0.066	−0.071	−0.111	0.338∗	−0.006	0.090	0.298∗
11.	Influence at work	−0.195‡	−0.236∗	0.084	−0.047	−0.046	−0.144	0.267∗	−0.040	−0.132	−0.091

^∗p < 0.01.

^†0 = no, 1 = yes.

^‡p < 0.05.

^§1 = male, 2 = female.