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Summary of clinical and social demographics (n = 70)
| Characteristics | Statistics | |
|---|---|---|
| Age (years), median (IQR) | 48 (39–62) | |
| Laterality, n (%) | Right | 27 (38.6%) |
| Left | 43 (62.0%) | |
| Birth history, n (%) | First birth | 17.9 ± 1.5 (16–24) |
| Last birth | 24.4 ± 2.4 (19–30) | |
| Duration of breast feeding (months), n (%) | < 3 | 12 (17.1%) |
| 3–6 | 46 (65.7%) | |
| 6–9 | 10 (14.3%) | |
| > 9 | 2 (2.9%) | |
| Menstrual history, mean ± SD (range) | Menarchy (years) | 14.3 ± 0.9 (12–16) |
| Menopause (years) | 49.4 ± 2 (42–52) | |
| Family history, n (%) | 7 (10.0%) | |
