Table 2 Median, crude mean and adjusted mean percentage and absolute mammographic density by smoking status

Current smokers

310

9.4 (0–59.4)

8.0 (7.0–9.1)

7.3 (6.5–8.3)

13.7 (0–110.1)

10.7 (9.4–12.2)

10.4 (9.0–12.0)

Former smokers

279

7.7 (0–51.1)

6.7 (5.8–7.7)

7.5 (6.6–8.5)

11.9 (0–155.2)

9.7 (8.4–11.4)

10.6 (9.2–12.2)

Never smokers

318

11.9 (0–69.2)

9.7 (8.6–11.0)

9.5 (8.4–10.7)

17.1 (0–152.3)

14.0 (12.3–15.9)

13.7 (11.9–15.7)

P value^a

0.03

0.003

0.004

0.005

P value^b

<0.001

0.006

<0.001

0.01