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Influence of co-morbidity on antibiotic prophylaxis
| Co-morbidity | χ2 | Degrees of freedom | p-value |
|---|---|---|---|
| Age >60 years | 0 | 1 | 1 |
| Diabetes | 2.876 | 1 | 0.090 |
| Chronic respiratory disease | 0.084 | 1 | 0.771 |
| Systemic steroid use | 2.426 | 1 | 0.119 |
| Valvular heart disease/replacement | 24.96 | 1 | 5.9 x 10–7 |
| Cardiovascular disease | 0 | 1 | 1 |
| ASA grade 2 | 0 | 1 | 1 |
| ASA grade 3 | 0.332 | 1 | 0.564 |
| ASA grade 4 | 0.516 | 1 | 0.473 |
ASA = American Society of Anesthesiologists
