Table 2.

Descriptive statistics of the investigated variables

	n	Mean	SD
Cervical pain	115	1.56	0.53
Lumbar pain	115	1.59	0.61
Age	116	39.94	11.90
Smoker	116	0.26	0.44
Sex	116	1.84	0.37
Quantitative work demands	116	59.02	13.40
Degrees of freedom at work	116	35.02	15.84
Shift work (0 = no, 1 = yes)	116	0.91	0.29
Work–family conflict	116	37.72	25.74
Interruptions	116	2.13	0.50
Influence at work	116	39.19	18.64

SD, standard deviation.