Table I.
Clinical and demographic characteristics of breast cancer patients and healthy controls.
| Cases (n=47) | Controls (n=165) | ||||
|---|---|---|---|---|---|
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| Characteristics | No. (%) | Median (IIQ or SD) | No. (%) | Median (IIQ or SD) | P-value |
| Age (years)a | 57.6 (10.6) | 56.1 (8.1) | 0.295 | ||
| BMI (kg/m2)b | 28.2 (5.9) | 28.9 (7.2) | 0.206 | ||
| Abdominal circumference (cm)b | 93.0 (17.0) | 94.0 (17.0) | 0.850 | ||
| Age at menarche (years)b | 13.0 (3.0) | 13.0 (2.0) | 0.584 | ||
| Age at first pregnancy (years)b | 20.0 (5.0) | 22.0 (8.0) | 0.365 | ||
| Exclusive breast feeding (months)b | 15.0 (45.0) | 12.0 (32.0) | 0.526 | ||
| No. of children, n (%) | |||||
| 1–3 | 32 (68.1) | 114 (53.77) | |||
| >4 | 15 (31.9) | 51 (46.2) | 0.730 | ||
| Menopausal status, n (%) | 0.434 | ||||
| Yes | 31 (67.4) | 102 (61.1) | |||
| Hormone therapy use, n (%) | 0.179 | ||||
| Yes | 5 (11.1) | 33 (19.8) | |||
| Contraceptive use, n (%) | 0.403 | ||||
| Yes | 34 (73.9) | 133 (79.6) | |||
a
Median and standard deviation (SD), t-test.
b
Median and interquartile range (IIQ), Mann-Whitney non-parametric test and Chi-square test.
BMI, body mass index.