Table 1

Number and percentage of total for exposure groups

Predictor variables	n	%
Low work demands	572	10
Medium work demands	4521	79
High work demands	613	11

Low decision latitude	576	10
Medium decision latitude	4442	78
High decision latitude	390	7

Low social support	560	10
Medium social support	4532	79
High social support	598	11

Not supervisor	4536	80
Supervisor	1124	20

Blue collar	2498	45
Middle white collar	2189	39
High white collar	905	16

Non-solitary work	4781	84
Solitary work	896	16
Sedentary work	3582	64
Non-sedentary work	2041	36

Low physical load	1538	27
Intermediate physical load	3462	61
High physical load	679	12

Part time	472	8
Full time	2807	50
Overtime 1–7 h	1554	28
Overtime 8–15 h	640	12
Overtime >15 h	116	2

No extra work	5153	91
Extra work	530	9

Day work	3535	63
Shift work with day work only	1512	27
Shift work with night work	539	10

Married	4097	72
Unmarried	1603	28

Male	3250	57
Female	2470	43

Age <30	990	17
Age 30–45	2203	39
Age 45+	2527	44

Not having children	3046	54
Having children <7 y	2633	46

No exercise	1331	23
Exercise	4371	77

Coffee <4 cups	4069	71
Coffee ≥4 cups	1651	29

Not smoking	4256	74
Smoking	1439	25

BMI <28	4851	85
BMI ≥28	844	15

Not disturbed sleep	5346	94
Disturbed sleep	356	6

Not snoring	4917	88
Snoring	664	12