Table 5. Distribution of 454 endometrial cancer cases and 908 controls, and corresponding odds ratio (OR) with 95% confidence intervals (CIs)a, by body mass index (BMI) at ages 30 and 50 years in strata of BMI at diagnosis,b Italy, 1992–2006.
|
BMI at age 30 yearsc
|
BMI at age 50 yearsd
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Cases
|
Controls
|
Cases
|
Controls
|
|||||||
| BMI (kg m−2) at diagnosis | No. | (%) | No. | (%) | OR (95% CI) | No. | (%) | No. | (%) | OR (95% CI) |
| <25 | ||||||||||
| <25 | 114 | (93.4) | 351 | (93.4) | 1e | 79 | (85.9) | 270 | (89.4) | 1e |
| ⩾25 | 8 | (6.6) | 25 | (6.7) | 1.24 (0.49–3.13) | 13 | (14.1) | 32 | (10.6) | 1.59 (0.71–3.52) |
| ⩾25 to <30 | ||||||||||
| <25 | 117 | (76.5) | 237 | (75.5) | 1e | 55 | (42.0) | 113 | (40.5) | 1e |
| 25 to <30 | 31 | (20.3) | 64 | (20.4) | 0.99 (0.58–1.68) | 66 | (50.4) | 147 | (52.7) | 1.02 (0.63–1.65) |
| ⩾30 | 5 | (3.3) | 13 | (4.1) | 0.95 (0.30–3.02) | 10 | (7.6) | 19 | (6.8) | 1.70 (0.66–4.35) |
| χ2 for trend (P-value) | 0.01 (P=0.93) | 0.52 (P=0.47) | ||||||||
| ⩾30 | ||||||||||
| <25 | 76 | (47.2) | 64 | (49.6) | 1e | 11 | (7.5) | 10 | (8.4) | 1e |
| 25 to <30 | 61 | (37.9) | 48 | (37.2) | 1.12 (0.62–2.00) | 51 | (34.7) | 48 | (40.2) | 0.89 (0.29–2.76) |
| ⩾30 | 24 | (14.9) | 17 | (13.2) | 1.23 (0.54–2.82) | 85 | (57.8) | 61 | (51.3) | 1.60 (0.52–4.96) |
| χ2 for trend (P-value) | 0.29 (P=0.59) | |||||||||
a
ORs from conditional logistic regression models, conditioned on age and study centre, adjusted for year of interview, education, smoking status, age at menarche, age at menopause, oral contraceptives use, parity, and hormone replacement therapy use, when appropriate.
b
The sum does not add up to the total because of some missing values.
c
Women ⩾30 years old only.
d
Women ⩾50 years old only.
e
Reference category.