TABLE 2.
Univariate analysis of risk factors for IH repair.
| Hazard ratio | 95% CIs | p-value | |
|---|---|---|---|
| Gender | |||
| Female | Reference | Reference | Reference |
| Male | 1.44 | 1.39, 1.48 | <0.001 |
| Age at index operation | |||
| 18–50 | Reference | Reference | Reference |
| 51–70 | 1.82 | 1.75, 1.89 | <0.001 |
| 71+ | 1.83 | 1.75, 1.92 | <0.001 |
| Ethnicity | |||
| White (Caucasian) | Reference | Reference | Reference |
| Asian | 0.74 | 0.67, 0.81 | <0.001 |
| Black or Black British | 0.59 | 0.52, 0.66 | <0.001 |
| Other | 0.75 | 0.66, 0.86 | <0.001 |
| Not known | 0.57 | 0.53, 0.61 | <0.001 |
| Not Recorded | 0.29 | 0.17, 0.49 | <0.001 |
| Charlson Comorbidity Index (CCI) | |||
| 0 | Reference | Reference | Reference |
| 1 | 0.65 | 0.41, 1.02 | 0.061 |
| 2+ | 1.74 | 1.69, 1.80 | <0.001 |
| Comorbidities | |||
| Diabetes a | 1.31 | 1.25, 1.37 | <0.001 |
| Smoking a | 1.38 | 1.33, 1.44 | <0.001 |
| Chronic obstructive pulmonary disease [COPD] a | 1.91 | 1.80, 2.02 | <0.001 |
| Obesity a | 1.29 | 1.24, 1.35 | <0.001 |
| Immunosuppression a | 1.26 | 1.14, 1.40 | <0.001 |
a
Reference level = “absence”.