Multiple regression analysis for pneumothorax
| Significant variable | Iatrogenic pneumothorax | |||
|---|---|---|---|---|
| Incidence ratio | 95% CI | p Value | ||
| Lower | Upper | |||
| Female | 0.93 | 0.51 | 1.70 | 0.82 |
| BMI category | ||||
| Normal weight 18.0–24.9 | Reference | |||
| Underweight <18.0* | 3.00 | 1.22 | 7.38 | 0.017 |
| Overweight 25–29.9 | 1.17 | 0.59 | 2.33 | 0.65 |
| Obese 30–39.9 | 0.97 | 0.40 | 2.34 | 0.94 |
| Morbidly obese >40 | No events (constant) | |||
| PTT | 1.01 | 1.00 | 1.02 | 0.059 |
| Volume category (mL)* | ||||
| 0 | No events (constant) | |||
| 1–1500 | Reference | |||
| >1500 | 4.87 | 2.52 | 9.42 | <0.0001 |
| Supine | 1.37 | 0.51 | 3.67 | 0.53 |
| Bilateral* | 0.39 | 0.19 | 0.81 | 0.011 |
| Needle passes category | ||||
| 1 | Reference | |||
| ≥2*† | 5.23 | 1.17 | 23.88 | 0.031 |
*Statistically significant at p<0.05.
†Data driven by three needle passes.
BMI, body mass index; PTT, partial thromboplastin time.