Table 2 Odds ratios and 95% confidence intervals for breast cancer incidence in relation to moderate 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		 14-20 155
73
49
33		 182
101
99
93		 1.00
.83(.57-1.20)
.57(.38-.85)
.39(.24-.60)
<.0001		 1.00
.92(.57-1.47)
.80(.49-1.31)
.63(.36-1.12)
.068		 334
96
69
49		 284
92
117
117		 1.00
.88(.63-1.23)
.50(.35-.70)
.35(.24-.51)
<.0001		 1.00
.95(.62-1.45)
.59(.38-.91)
.65(.41-1.03)
.018
Inactive
<.8
.8-2.4
>2.4
P for trend		 21-34 187
59
33
31		 240
77
81
77		 1.00
.95(.65-1.41)
.52(.33-.81)
.49(.31-.78)
.0002		 1.00
1.18(.73-1.92)
.65(.37-1.13)
.66(.37-1.18)
.074		 390
71
37
50		 359
86
86
79		 1.00
.75(.53-1.07)
.39(.26-.60)
.58(.40-.85)
<.0001		 1.00
1.01(.66-1.54)
.46(.28-.77)
1.06(.64-1.75)
.063
Inactive
<.75
.75-2.5
>2.5
P for trend		 35-50 186
44
46
34		 231
82
83
79		 1.00
.69(.45-1.04)
.71(.47-1.08)
.52(.33-.82)
.0023		 1.00
.58(.27-.96)
.84(.51-1.39)
.79(.46-1.34)
.18		 368
74
50
56		 365
79
84
82		 1.00
.94(.66-1.34)
.59(.40-.87)
.67(.46-.97)
.0025		 1.00
.98(.62-1.54)
.64(.39-1.03)
1.07(.67-1.71)
.32
Inactive
<.8
.8-2.9
>2.9
P for trend		 >50 420
49
42
37		 426
69
57
58		 1.00
.73(.50-1.09)
.75(.49-1.15)
.65(.42-1.01)
.016		 1.00
.94(.57-1.56)
.94(.56-1.59)
1.02(.58-1.79)
.77
OR – odds ratios; CI – 95% confidence interval. - Adjusted for age. Adjusted for age, body mass index, age at first childbirth, parity, breast-feeding, family history of breast cancer, fruits and vegetable consumption, active and passive smoking, household and occupational physical activity, and vigorous recreational activity.