Table 2.
Comparisons of the incidence and severity of PLSP between the groups with drain and the other without drain before and after IPTW adjustment.
| PLSP | Before IPTW | P | After IPTW | P | ||
|---|---|---|---|---|---|---|
| Without drain | With drain | Without drain | With drain | |||
| (N = 257) | (N = 191) | (N = 442) | (N = 438) | |||
| Incidence | 0.039 | < 0.001 | ||||
| 98 (38.1%) | 55 (28.8%) | 175 (39.5%) | 114 (26.1%) | |||
| Crude HR = 0.71 (0.51–0.98) | Adjusted HR = 0.61 (0.48–0.77) | |||||
| Severity | 0.036 | < 0.001 | ||||
| Mild | 44 (17.1%) | 24 (12.6%) | 85 (19.2%) | 44 (10.2%) | ||
| Moderate | 36 (14.0%) | 26 (13.6%) | 57 (13.0%) | 61 (14.0%) | ||
| Severe | 18 (7.0%) | 5 (2.6%) | 32 (7.3%) | 9 (1.9%) | ||
| Crude OR = 0.66 (0.44–0.97) | Adjusted OR = 0.56 (0.43–0.74) | |||||
Data are exhibited as count (%). IPTW inverse probability of treatment weighting, HR hazard ratio, OR odds ratio, HR and OR are estimated using Cox and Ordinal logistic regression models, respectively, and presented in their estimated values (95% CI).