Table 3 Odds ratios and 95% confidence intervals for breast cancer incidence in relation to vigorous recreational physical activity (average hrs/week/year) during four periods of life by menopausal status.
Physical Premenopausal women Postmenopausal women
activity Ages Cases Controls OR† (95%CI) OR† † (95%CI) Cases Controls OR† (95%CI) OR† † (95%CI)
Inactive
<1.7
1.7-4.5
>4.5
P for trend		 14-20 150
72
51
37		 162
110
115
88		 1.00
.68(.47-.99)
.47(.31-.70)
.42(.26-.60)
<.0001		 1.00
.81(.55-.39)
.65(.40-1.05)
.65(.38-1.12)
.036		 340
117
61
30		 280
104
102
124		 1.00
.93(.68-1.26)
.49(.34-.70)
.20(.13-.30)
<.0001		 1.00
.90(.61-.33)
.55(.35-.86)
.26(.15-.44)
<.0001
Inactive
<.56
.56-1.8
>1.8
P for trend		 21-34 211
36
36
27		 225
86
83
81		 1.00
.43(.28-.67)
.44(.28-.68)
.33(.20-.53)
<.0001		 1.00
.55(.32-.92)
.50(.30-.85)
.33(.18-.62)
<.0001		 417
71
28
32		 392
69
74
75		 1.00
.96(.67-1.36)
.40(.26-.61)
.35(.22-.56)
<.0001		 1.00
1.16(.74-.82)
.60(.34-1.04)
.49(.28-.83)
.037
Inactive
<.49
.49-1.74
>1.74
P for trend		 35-50 205
39
31
35		 260
71
71
73		 1.00
.73(.47-.13)
.56(.35-.89)
.59(.40-.93)
.0024		 1.00
.68(.41-1.15)
.63(.37-1.08)
1.02(.59-1.77)
.30		 414
59
38
37		 420
65
65
60		 1.00
.91(.63-1.34)
.58(.40-.89)
.60(.39-.93)
.0024		 1.00
1.00(.60-.69)
.72(.42-1.22)
.93(.53-1.61)
.30
Inactive
<.52
.5.2-1.74
>1.74
P for trend		 >50 473
32
26
17		 478
40
50
42		 1.00
.83(.51-1.34)
.53(.32-.86)
.40(.23-.72)
.0001		 1.00
.80(.44-.45)
.58(.29-.16)
.52(.27-.97)
.013
OR – odds ratios; CI – 95% confidence interval.
- Adjusted for age.
Adjusted for age, body mass index, parity, breast-feeding, family history of breast cancer, fruits and vegetable consumption, active and passive smoking, household and occupational physical activity, and moderate recreational activity.