Table 2. Characteristics of the 83 patients and results of statistical differences between patients with DFIs and DFOs.
| DFI (n=68) | DFO (n=15) | Total (DFI+DFO) (n=83) | p | |
|---|---|---|---|---|
| Age, mean (SD) | 73.1 (10.6) | 67.7 (9.9) | 72.1 (10.6) | 0.074 |
| Charlson comorbidity index, median (IQR) | 6 (5-7) | 5 (4-6) | 6 (5-7) | 0.162 |
| Male, n (%) | 42 (61.8) | 10 (66.7) | 52 (62.7) | 0.777 |
| Prior hospitalization, n (%) | 27 (39.7) | 4 (26.7) | 31 (37.3) | 0.394 |
| Prior antimicrobial use, n (%) | 37 (54.4) | 11 (73.3) | 48 (57.8) | 0.251 |
| Oral hypoglycemic drugs, n (%) | 18 (26.5) | 6 (40) | 24 (28.9) | 0.350 |
| Insulin, n (%) | 47 (69.1) | 9 (60) | 56 (67.5) | 0.549 |
| Appropriate empiric antimicrobial treatment, n (%) | 40 (58.8) | 6 (40) | 46 (55.4) | 0.253 |
| Duration of hospitalization, median (IQR) | 15.5 (8.8-21) | 19 (10-24) | 17 (9.5-21) | 0.284 |
DFI - diabetic foot infection; DFO - diabetic foot osteomyelitis; IQR - interquartile range; SD - standard deviation.
Statistical tests performed for comparison of characteristics among patients with DFI and DFO included Student’s t-test for comparison of age, Mann-Whitney for comparison of Charlson’s Comorbidity Index and duration of hospitalization, and Fischer’s exact test for comparison of proportions of male, prior hospitalization, prior antimicrobial use, oral hypoglycemic drugs, insulin use, and appropriateness of antimicrobial treatment.