Table 1

Descriptive data at baseline presented by group

	Intervention group		Control group		Group differences
	N	%	N	%	P value
Total	370	100	266	100
Gender					0.157
Women	284	77	191	72
Men	86	23	75	28
Educational level*					0.007†‡
Elementary school	35	10	43	16
Upper secondary school	169	46	131	49
University courses	33	9	17	6
University exam	132	36	73	27
Having children living at home§	178	48	128	48	0.657
Sharing household with another person*	278	75	198	74	0.997
Living alone with children¶	13	4	15	6	0.224
Working area					0.403**
Social services	109	30	61	23
Technical services	124	34	112	42
Care and welfare	86	23	73	27
Call centre	51	14	20	8
Shift workers††	89	24	102	38	0.000†