| Variables | % | Crude PR(CI 95%) | p | Adjusted PRa (CI 95%) | p |
---|---|---|---|---|---|---|
Staging | 0–2 | 46.4 | 1 | 0.001 | 1 | 0.216 |
 | 3–4 | 43.8 | 2.23(1.33–3.72) |  | 1.15(0.78–2.92) |  |
Type of surgery (breast) | Conservative | 40.2 | 1 | 0.04 | 1 | 0.91 |
 | Radical | 59.8 | 0.63(0.38–1.04) |  | 0.96(0.45–2.00) |  |
Level of axillary lymphadenectomy | Sampling | 6.3 | 1 | <0.01 | 1 | 0.52 |
 | Dissection-low | 42.0 | 3.76(1.50–9.42) |  | 1.81(0.53–6.17) |  |
 | Dissection-high | 35.7 | 4.44(1.73–11.40) |  | 1.42(0.39–5.18) |  |
Chemotheraphy performed | No | 11.6 | 1 | <0.01 | 1 | 0.69 |
 | Yes | 87.5 | 3.22(1.62–6.38) |  | 4.71(0.62–5.74) |  |
Any chemotherapy performed on arm ipsilateral to surgery | No | 74.1 | 1 | 0.11 | 1 | 0.91 |
 | Yes | 11.6 | 2.01(0.76–5.29) |  | 1.06(0.34–3.33) |  |
Radiotherapy performed | No | 9.8 | 1 | 0.478 | Â | Â |
 | Yes | 90.2 | 1.12(0.49–2.54) |  |  |  |
Area administered radiotherapy | Biopsy | 56.3 | 1 | 0.008 | 1 | 0.13 |
 | Axilla-breast | 28.6 | 2.67(1.27–5.59) |  | 2.83(0.93–8.56) |  |
 | Breast, axilla, supraclavicular fossa | 15.2 | 2.66(1.17–6.02) |  | 1.52(0.47–4.86) |  |