Comparison of the combinations of two antibiotics selected by physicians with different seniority levels
| Medications, n (%) | <10 y (n=25) | 10–20 y (n=50) | >20 y (n=105) | χ2 | P value |
| BLIs+AAAs | 9 (36.0) | 16 (32.0) | 24 (22.9) | 8.246 | 0.410 |
| Carbapenems+GLPs | 8 (32.0) | 9 (18.0) | 25 (23.8) | ||
| Cephalosporins+AAAs | 5 (20.0) | 11 (22.0) | 21 (20.0) | ||
| Cephalosporins+PENs | 0 (0) | 8 (16.0) | 20 (19.0) | ||
| Carbapenems+AAAs | 3 (12.0) | 6 (12.0) | 15 (14.3) |
AAAs, antianaerobic agents; BLIs, beta-lactamase inhibitors; GLPs, glycopeptides; PENs, penicillins.