Table 2.
Univariate and multivariate binary logistic regression association of patient and policy factors to adverse events (emergency presentation and complications)
| Univariate | Multivariate | |||
|---|---|---|---|---|
| OR (95% CI) | p-value | OR (95% CI) | p-value | |
| Any complication | ||||
| Age* | 1.12 (1.05–1.21) | <0.001 | 1.10 (1.02–1.17) | 0.009 |
| Female sex | 1.43 (0.66–2.75) | 0.324 | 1.13 (0.54–2.36) | 0.742 |
| Recurrent hernia type | 1.34 (0.05–0.07) | 0.705 | 1.13 (0.60–2.11) | 0.713 |
| After policy change | 1.33 (0.90–1.98) | 0.161 | 1.26 (0.85–1.88) | 0.257 |
| Emergency presentation | 4.60 (2.54–7.95) | <0.001 | 3.68 (2.04–6.63) | <0.001 |
| Major complications | ||||
| Age* | 1.10 (0.10–1.30) | 0.246 | 1.02 (0.88–1.19) | 0.760 |
| Female sex | 1.43 (0.66–2.75) | 0.324 | 0.51 (0.06–4.07) | 0.526 |
| Recurrent hernia type | 1.14 (0.55–2.12) | 0.705 | 1.63 (0.46–5.80) | 0.448 |
| After policy change | 1.33 (0.90–1.98) | 0.161 | 1.12 (0.44–2.85) | 0.813 |
| Emergency presentation | 4.60 (2.54–7.95) | <0.001 | 12.96 (4.68–35.87) | <0.001 |
OR = odds ratio; CI = confidence interval
*
OR relates to a 10% increase in age. All models were repeated using age as an unadjusted continuous variable; there were no alterations to significance and the maximum change to the Akaike information criterion was 0.8%.