Table 1. Baseline characteristics of all enrolled patients.
| Factor | N | % |
|---|---|---|
| Age at diagnosis (years) | ||
| <30 | 22 | 25.0 |
| 30–40 | 57 | 64.8 |
| ≥40 | 9 | 10.2 |
| Gravidity | ||
| G0 | 3 | 3.4 |
| ≥G1 | 81 | 92.0 |
| Missing | 4 | 4.5 |
| Parity | ||
| P0 | 8 | 9.1 |
| ≥P1 | 76 | 86.4 |
| Missing | 4 | 4.5 |
| Breastfeeding time (year)* | ||
| <1 | 54 | 71.1 |
| ≥1 | 19 | 25.0 |
| Missing | 3 | 3.9 |
| Time since last breastfeed (years)* | ||
| <1 | 15 | 19.7 |
| 1–2 | 21 | 27.6 |
| 2–3 | 12 | 15.8 |
| 3–4 | 13 | 17.1 |
| ≥4 | 12 | 15.8 |
| Missing | 3 | 3.9 |
| Affected breast | ||
| Left | 49 | 55.7 |
| Right | 38 | 43.2 |
| Bilateral | 1 | 1.1 |
| Lump size at the first visit (cm) | ||
| <2 | 4 | 4.5 |
| 2–5 | 59 | 67.0 |
| ≥5 | 25 | 28.4 |
| Affected quadrant | ||
| Upper inner quadrant | 20 | 22.7 |
| Lower inner quadrant | 6 | 6.8 |
| Upper outer quadrant | 34 | 38.6 |
| Lower outer quadrant | 12 | 13.6 |
| Central region | 16 | 18.2 |
| Pain | ||
| Painless | 22 | 25.0 |
| Light | 42 | 47.7 |
| Moderate to severe | 22 | 25.0 |
| Skin redness | 43 | 48.9 |
| Abscess | 48 | 54.5 |
| Sinus | 16 | 18.2 |
| Axillary node enlargement | 26 | 29.5 |
*, 12 women with no history of breastfeeding were not included in this data.