Table 4 Demographics and life style characteristics in the five different user groups. The NOWAC study, 2003–2011, Tromsø, Norway

Number of observations

2131

43239

28455

38037

2340

Characteristics

Mean (SD)

Mean (SD)

Mean (SD)

Mean (SD)

Mean (SD)

p-value

 Age at answering questionnaire

55.0 (5.0)

54.6 (4.8)

55.0 (4.9)

54.9 (4.8)

54.9 (4.8)

p < 0.01^a

 Education, years

12.3 (3.9)

13.1 (3.6)

12.7 (3.4)

12.9 (3.4)

13.0 (3.5)

p < 0.01^a

 Household income, 10 000’s NOK

47.9 (23.2)

55.9 (22.0)

56.7 (21.4)

58.3 (22.1)

56.1 (23.4)

p < 0.01^a

 BMI, kg/m²

27.7 (5.8)

25.7 (4.8)

25.1 (4.0)

24.7 (3.8)

24.2 (3.9)

p < 0.01^a

 Physical activity^d

5.1 (2.1)

5.6 (1.8)

5.9 (1.8)

6.1 (1.8)

6.5 (2.0)

p < 0.01^a

 Age at menarche

13.2 (1.5)

13.3 (1.4)

13.3 (1.4)

13.3 (1.4)

13.2 (1.5)

p = 0.36^a

 Age at menopause

48.5 (5.2)

49.0 (4.8)

49.1 (4.7)

49.0 (4.9)

48.6 (5.3)

p < 0.01^a

 Age at first birth

23.9 (4.7)

24.3 (4.7)

24.0 (4.4)

24.0 (4.4)

23.8 (4.3)

p < 0.01^a

 Number of children

2.4 (1.4)

2.2 (1.2)

2.2 (1.1)

2.1 (1.1)

2.1 (1.1)

p < 0.01^a

Median (25^th–75^thpercentile)

Median (25^th–75^thpercentile)

Median (25^th–75^thpercentile)

Median (25^th–75^thpercentile)

Median (25^th–75^thpercentile)

Breast feeding, months

11 (4–21)

12 (6–21)

11 (5–19)

10 (5–18)

10 (4–19)

p < 0.01^b

Alcohol, gr/day

0.95 (0–3.3)

1.98 (0.5–5.5)

2.55 (0.9–6.2)

2.92 (1.0–6.3)

2.53 (0.9–6.3)

p < 0.01^b

%

%

%

%

%

 Never

39.9

38.8

35.0

34.0

34.4

p < 0.01^c

 Former

27.4

37.7

41.0

42.2

40.3

 Current

32.7

23.5

24.0

23.8

25.3

 Never

48.4

31.3

38.2

36.0

36.6

p < 0.01^c

 Former

51.0

58.3

61.3

63.5

62.6

 Current

0.6

0.5

0.5

0.6

0.8

 Never

73.8

66.6

60.6

57.8

53.8

p < 0.01^c

 Former

17.0

20.7

23.6

23.4

24.4

 Current

9.2

12.7

15.8

18.8

21.8

 Ever

8.1

11.1

11.6

11.9

12.3

p < 0.01^c

p < 0.01^c

 Current

5.9

10.7

10.7

10.8

9.9