Table 4.
Independent associated factors for foot infections using multivariate logistical regression (odds ratios [95% CI])
| Risk factor | Unadjusted | P value | Adjusted | P value |
|---|---|---|---|---|
| Model 1 | ||||
| Acute foot trauma | 16·67 [3·73–74·43] | <0·001 | 19·16 [2·82–130·12] | 0·003 |
| Previous foot ulcer | 23·01 [7·97–66·44] | <0·001 | 39·81 [10·94–144·90] | <0·001 |
| Past surgeon treatment | 8·68 [2·71–27·83] | <0·001 | 19·88 [3·56–110·98] | 0·001 |
| Model 1 results | Pseudo R 2:0·452 omnibus: df = 3, P < 0·001 | Missing: 12 (1·6%); H&L: P = 1·00 | Pseudo R 2: 0·536 omnibus: df =10, P < 0·001 | Missing: 37 (5·0%); H&L: P = 0·904 |
| Model 2 | ||||
| Acute foot trauma | 13·65 [3·24–57·45] | <0·001 | No confounders identified | |
| Previous foot ulcer | 35·95 [13·11–98·56] | <0·001 | ||
| Model 2 results | Pseudo R 2:0·391 omnibus: df =2, P < 0·001 | Missing: 12 (1·6%); H&L: P = 1·00 | ||
Pseudo R 2, Nagelkerke R 2; omnibus, omnibus tests of model coefficients; df, degrees of freedom; missing, excluded missing cases; H&L, Hosmer and Lemeshow test.