Table 4. Hematoma risk factors.
| Risk factors | Total number | Haematoma | |||
|---|---|---|---|---|---|
| Number | % | Odds ratio* (95% CI) | P value** | ||
| Treatment | 1.91 (0.53–6.88) | 0.322 | |||
| TXA | 48 | 5 | 10.4 | ||
| Control | 33 | 6 | 18.2 | ||
| Previous radiotherapy | 0.64 (0.13–3.25) | 0.593 | |||
| No | 61 | 9 | 14.8 | ||
| Yes | 20 | 2 | 10.0 | ||
| Neoadjuvant chemotherapy | 2.37 (0.41–13.58) | 0.333 | |||
| No | 73 | 9 | 12.3 | ||
| Yes | 8 | 2 | 25.0 | ||
| Smoker | 3.67 (0.59–22.97) | 0.165 | |||
| No | 75 | 9 | 12.0 | ||
| Yes | 6 | 2 | 33.3 | ||
| Flap type | 5.80 (1.52–22.15) | 0.010 | |||
| DIEP | 45 | 3 | 6.7 | ||
| PAP | 7 | 1 | 14.3 | ||
| TMG | 18 | 6 | 33.3 | ||
| S-GAP | 11 | 1 | 9.1 | ||
| Age | 10.00 (1.18–84.76) | 0.035 | |||
| ≤50 years | 38 | 1 | 2.6 | ||
| >50 years | 43 | 8 | 18.6 | ||
For two patients with multiple procedures the data from the procedure without use of TXA only were used. *, odds ratio was calculated as second versus first category, for flap type as TMG versus other types; **, univariate logistic regression. DIEP, deep inferior epigastric perforator; PAP, profunda artery perforator; TMG, transverse myocutaneous gracilis; S-GAP, superior gluteal artery; TXA, tranexamic acid.