# Table 4 Multivariate adjusted*mean (95%CI) of percent (%) mammographic density by moderateâ€‰+â€‰strenuous physical activity (mins/week) for all women combined and stratified by BMI

VARIABLES

ALL

In strata of BMI

Â Â

< 25

â‰¥ 25-29

â‰¥ 30

Â

Nâ€‰=â€‰2218

Nâ€‰=â€‰1235

Nâ€‰=â€‰732

Nâ€‰=â€‰251

Moderateâ€‰+â€‰strenuous activity (mins/week)

Â Â Â Â Â Â Â Â

No activity

566

16.9 (16.3- 17.5)

287

20.9 (20.2- 21.6)

200

14.8 (14.2- 15.5)

79

8.0 (7.5- 8.5)

â‰¤ 30

193

17.2 (16.1- 18.2)

90

21.9 (20.8- 23.1)

73

14.9 (13.9- 16.0)

30

8.4 (7.6- 9.2)

31- 45

265

17.2 (16.2- 18.2)

139

22.9 (21.8- 24.0)

84

13.0 (12.0 - 14.1)

42

7.5 (6.7- 8.3)

46- 100

435

18.5 (17.8- 19.1)

238

23.2 (22.4- 23.9)

149

13.8 (13.1- 14.6)

48

7.3 (6.6- 8.0)

101-180

426

19.1 (18.4- 19.8)

254

24.0 (23.2- 24.8)

136

12.5 (11.7 -13.3)

36

7.7 (6.8- 8.7)

>180

333

20.6 (20.0- 21.3)

227

25.4 (24.6- 26.1)

90

12.1 ( 11.2- 13.0)

18

7.2 (5.8- 8.6)

p for trend

Â

0.81

Â

0.06

Â

0.001

Â

0.51

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