Comparison of primary and secondary outcomes before and after stabilized inverse probability of treatment weighting
| Variable | Before sIPTW | After sIPTW | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Propofol group (n = 461) | Sevoflurane group (n = 372) | OR or mean difference (95% CI) | Propofol group (n = 462.1) | Sevoflurane group (n = 359.2) | OR or mean difference (95% CI) | ||||
| Primary outcome | |||||||||
| Chronic postsurgical pain | 184 (39.9) | 177 (47.6) | 0.73 (0.56–0.96) |
0.027 | 184.4 (39.9) | 168.9 (47.0) | 0.75 (0.57–0.99) |
0.041 | |
| Secondary outcomes | |||||||||
| Length of stay (days) | 5.0 ± 3.3 | 5.5 ± 4.5 | –0.49 (–0.06 to 1.04) |
0.124 | 5.0 ± 3.4 | 5.3 ± 4.5 | –0.29 (–0.83 to 0.24) |
0.277 | |
| Opioid prescriptions at outpatient clinic between 3 to 6 mo postoperatively | 12 (2.6) | 7 (1.9) | 1.39 (0.54–3.58) |
0.490 | 10.4 (2.3) | 8.1 (2.3) | 1.00 (0.40–2.54) |
0.993 | |
The values are presented as means ± standard deviations, numbers (%), OR, or mean difference (95% CI).
sIPTW: stabilized inverse probability of treatment weighting, OR: odds ratio, CI: confidence interval.