Table 5. Univariate capsular contracture grade III–IV and risk estimates.
| Factors | No. of patients/at risk | Odd ratio (95% CI) | P value |
|---|---|---|---|
| Radiation | |||
| No | 7/48 | Ref | |
| Yes | 16/38 | 4.35 (1.55–12.27) | 0.005 |
| RT dose | |||
| 50 Gy | 10/31 | Ref | |
| >50 Gy | 2/4 | 1.38 (0.17–11.15) | 0.413 |
| Radiation volume | |||
| Chest wall/breast + RNI | 10/24 | Ref | |
| Chest wall | 4/8 | 0.5 (0.3–7.99) | 0.624 |
| Breast + tumor bed boost | 1/3 | 0.71 (0.14–3.55) | 0.681 |
| Subpectoral | 15/70 | Ref | |
| Prepectoral | 6/25 | 1.79 (0.63–5.09) | 0.275 |
CI, confidence interval; Ref, reference; RT, radiotherapy; RNI, regional lymph node irradiation.