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Table 2 Multivariate adjusted * mean (95%CI) of percent (%) mammographic density by duration of physical activity (mins/week) for all women and stratified by BMI

From: Physical activity and mammographic density in a cohort of postmenopausal Norwegian women; a cross-sectional study

VARIABLES

ALL

In strata of BMI

  

< 25

≥ 25-29

≥ 30

 

N = 2218

N = 1235

N = 732

N = 251

Physical_activity (mins/week)

        

No activity

140

15.6 (14.0- 17.3)

58

21.8 (19.4- 24.2)

46

15.9 (13.6- 18.2)

36

8.4 (5.9- 10.9)

30- 45

129

16.2 (14.6- 17.7)

59

22.2 (20.3- 24.0)

46

15.2 (13.5- 17.0)

24

8.1 (6.3- 10.0)

46-100

280

16.7 (15.8- 17.5)

138

22.5 (21.7- 23.9)

108

14.6 (13.3- 15.8)

34

7.9 (6.5- 9.3)

101-180

408

17.8 (17.1- 18.5)

215

23.0 (22.0- 23.8)

134

13.9 (13.0- 14.8)

59

7.7 (6.5- 9.0)

181-360

630

18.5 (18.0- 19.0)

353

23.2 (22.2- 24.1)

221

13.2 (12.2- 14.3)

56

7.5 (6.0- 9.0)

> 360

631

19.9 (19.4- 20.4)

412

23.6 (22.4- 24.8)

177

12.6 (11.2- 14.0)

42

7.3 (5.2- 9.4)

p for trend

 

0.65

 

0.25

 

0.04

 

0.60

  1. * Least square means and p values for trend from linear regression. Adjusted for age at mammography (continuous), years of education (≤ 11, 12–14, 15+), number of pregnancies (nulliparous, 1,2,3,4, 5–10), age at first full-term pregnancy for parous women (<20, 20–24, 25–29, 30+), postmenopausal hormone therapy (never, past, current), body mass index (continuous).
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