Multiple regression analysis for any complication
| Incidence rate ratio | 95% CI | p Value | ||
|---|---|---|---|---|
| Lower | Upper | |||
| Continuous PTT* | 1.01 | 1.008 | 1.02 | 0.031 |
| BMI category | ||||
| Normal weight 18.0–24.9 | Reference | |||
| Underweight <18.0 | 1.50 | 0.68 | 3.32 | 0.32 |
| Overweight 25–29.9 | 0.95 | 0.56 | 1.60 | 0.85 |
| Obese 30–39.9 | 0.89 | 0.46 | 1.72 | 0.73 |
| Morbidly obese >40 | No events (constant) | |||
| Fluid volume removed category | ||||
| 0 | No events (constant) | |||
| 1–1500 mL | Reference | |||
| >1500 mL* | 3.88 | 2.35 | 6.40 | <0.0001 |
| Bilateral* | 0.45 | 0.27 | 0.77 | 0.003 |
| Needle passes category | ||||
| 1 | Reference | |||
| ≥2 | 3.13 | 0.74 | 13.23 | 0.12 |
*Statistically significant at p<0.05.
BMI, body mass index; PTT, partial thromboplastin time.