Table 5.
Anaesthesia exposure and cluster membership. *Inverse probability of treatment weighting was used to account for imbalances in covariates across exposure categories. The values in the table represent the proportion of patients in each cluster by exposure status after weighting. †Overall P-value for the exposures variable. P<0.05 indicates that exposure status was significantly associated with cluster membership. ‡P=0.001, multinomial linear regression.
| Weighted proportion within each exposure status* (%) |
Odds ratios (95% confidence interval) |
P-value† | ||||
|---|---|---|---|---|---|---|
| Cluster A | Cluster B | Cluster C | Cluster A vs Cluster B | Cluster C vs Cluster B | ||
| Exposures | 0.002 | |||||
| None | 10.1 | 58.2 | 31.3 | 1.00 (reference) | 1.00 (reference) | |
| Single | 9.8 | 57.6 | 32.7 | 1.02 (0.50, 2.09) | 1.06 (0.69, 1.63) | |
| Multiple | 23.3 | 48.1 | 28.6 | 2.83 (1.49, 5.35)‡ | 1.09 (0.72, 1.67) | |