Table 3. Associations between different types of preoperative psychiatric morbidity and short-term surgery outcomes.
| Preoperative psychiatric morbidity | General complication within 30 days (missing = 234) | Surgical complication within 30 days (missing = 231) | Death within 90 days | |||
|---|---|---|---|---|---|---|
| Number of event/total (%) | RR bold>(95% CI)* | Number of event/ total (%) | RR (95% CI)* | Number of event/ total (%) | RR (95% CI)* | |
| Specified by identification approach | ||||||
| No | 330/1797 (18.4%) | Reference | 361/1797(20.1%) | Reference | 116/1956(5.9%) | Reference |
| Psychiatric medication only | 138/565 (24.4%) | 1.36 (1.08–1.70) |
145/568 (25.5%) | 1.27 (1.01–1.59) |
57/625(9.1%) | 1.59 (1.13–2.25) |
| Inpatient/outpatient diagnosis | 32/150 (21.3%) | 0.99 (0.63–1.54) |
39/150 (26.0%) | 1.25 (0.84–1.86) |
15/165 (9.1%) | 1.42 (0.70–2.89) |
* CI confidence interval; RR, relative risk. Relative risk was estimation by inverse probability of treatment weights (IPTW) weighted Poisson regression model, weighed by propensity score and adjusted for hospital volume (low, median, or high), preoperative chemotherapy (yes/no), preoperative radiotherapy (yes/no), operation type (curative/palliative), history of mental disorder (yes/no).