Adult BMI Change and Risk of Colon Cancer in Postmenopausal Women
Table 2
Odds ratios (ORs) of colon cancer for BMI by age, decadesa.
All postmenopausal women
Postmenopausal women with no HRT
Postmenopausal women with HRT
Case/control
OR
Case/control
OR
Normalc (ref)
147/315
1.00
—
72/105
1.00
—
75/210
1.00
—
BMI 2 yrsb
Overweight
159/302
0.98 (0.73–1.32)
0.88
87/117
0.95 (0.60–1.49)
0.82
72/185
1.01 (0.67–1.52)
0.96
Obese
188/279
1.25 (0.92–1.69)
0.16
0.19
120/123
1.39 (0.89–2.17)
0.15
0.11
68/156
1.21 (0.78–1.87)
0.39
0.57
Normal (ref)
192/410
1.00
—
101/145
1.00
—
91/265
1.00
—
BMI 50s
Overweight
125/242
0.96 (0.74–1.32)
0.77
73/91
1.06 (0.68–1.65)
0.79
52/151
0.95 (0.58–1.40)
0.66
Obese
126/163
1.27 (0.97–1.92)
0.07
0.19
70/79
1.18 (0.72–1.93)
0.50
0.64
56/84
1.74 (1.08–2.80)
0.02
0.08
Normal (ref)
250/529
1.00
—
127/192
1.00
—
123/337
1.00
—
BMI 40s
Overweight
101/176
1.07 (0.78–1.47)
0.66
57/64
1.29 (0.80–2.07)
0.30
44/112
1.01 (0.65–1.59)
0.93
Obese
71/114
1.25 (0.85–1.82)
0.26
0.43
43/59
1.18 (0.69–2.00)
0.54
0.81
28/55
1.45 (0.82–2.57)
0.20
0.25
Normal (ref)
306/629
1.00
—
159/227
1.00
—
147/402
1.00
—
BMI 30s
Overweight
66/115
1.06 (0.74–1.52)
0.76
37/52
1.02 (0.60–1.72)
0.95
29/63
1.11 (0.65–1.87)
0.71
Obese
42/56
1.42 (0.90–2.27)
0.13
0.90
27/27
1.50 (0.80–2.83)
0.21
0.47
15/29
1.38 (0.68–2.83)
0.38
0.76
Normal (ref)
333/650
1.00
—
178/250
1.00
—
153/400
1.00
—
BMI 20s
Overweight
48/74
1.15 (0.76–1.75)
0.50
29/30
1.32 (0.73–2.40)
0.35
19/44
1.10 (0.60–2.02)
0.77
Obese
18/36
0.87 (0.47–1.63)
0.67
0.50
13/20
0.85 (0.38–1.87)
0.68
0.20
5/16
0.91 (0.31–2.65)
0.86
0.93
aAdjusted for age, race, gender, education, income, physical activity, smoking, alcohol, nonsteroidal anti-inflammatory drugs use, family history of colorectal cancer, age at menarche, and parity. b2 years before recruitment/interview. cNormal: ≥18.5 to <25 kg/m2; overweight: ≥25 to <30 kg/m2; obese: ≥30 kg/m2. * value for trend.