Table 1 The description and prevalence of the potential risk factors (N=129)

From: Disc degeneration of the lumbar spine in relation to overweight

Variable

N

%

Occupation

 Construction carpenter

37

29

 Machine operator

43

33

 Office worker

49

38

History of overweight

 BMI ≥25 kg/m2 at the age of 25 and 40–45 y

18

14

 Othera

52

40

 BMI <25 kg/m2 at the age of 25 and 40–45 y

59

46

History of accidental back injuries before baseline study

 One or more injuries before baseline

32

25

 No injuries before baseline

94

75

Smoking status at baseline

 Smoker

44

34

 Ex-smoker

39

31

 Non-smoker

45

35

History of car driving before baseline study

 >15 000 km/y

37

29

 Less driving

92

71

  1. aOther: BMI ≥25 kg/m2 either at the age of 25 or 40–45 y.
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