Table 4.
Adjusted Hazard ratio after 1st episode of pneumothorax according to treatment groups and gender. Gray’s test was used for calculating subdistribution hazards.
| Variables | Treatment | Gender | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Group I (conservative) | Group II (surgery) | Male | Female | ||||||
| HR (95% CI) | p-value | HR (95% CI) | p-value | HR (95% CI) | p-value | HR (95% CI) | p-value | ||
| Age | |||||||||
| < 14 | 1.07 (0.99–1.16) | 0.073 | 5.74 (5.12–6.42) | < 0.001 | 1.63 (1.52–1.74) | < 0.001 | 0.97 (0.81–1.15) | < 0.001 | |
| ≥ 14, < 20 | 2.53 (2.46–2.61) | < 0.001 | 2.85 (2.72–2.99) | < 0.001 | 2.68 (2.62–2.75) | < 0.001 | 2.02 (1.87–2.18) | < 0.001 | |
| ≥ 20 | Ref | Ref | Ref | Ref | |||||
| Gender | |||||||||
| Male | Ref | Ref | |||||||
| Female | 0.59 (0.56–0.62) | < 0.001 | 0.74 (0.69–0.80) | < 0.001 | |||||
| Treatment | |||||||||
| Group I (conservative) | Ref | Ref | |||||||
| Group II (surgery) | 1.16 (1.13–1.18) | < 0.001 | 1.57 | (1.44–1.71) | < 0.001 | ||||
HR Hazard ratio, CI confidential interval.