TABLE 4.
Rates of Gram-negative bacteria susceptibility to different antibiotics [% (n)].
| Variable | Total (N = 159) | ARDS (N = 38) | Non-ARDS (N = 121) | Statistics | P |
| Penicillin | |||||
| Piperacillin | 21.8 (26) | 15.4 (4) | 23.7 (22) | 0.814 | 0.367 |
| Beta-lactam | |||||
| Ampicillin + Sulbactam | 45.2 (66) | 48.6 (17) | 44.1 (49) | 0.211 | 0.646 |
| Piperacillin + Tazobactam | 73.5 (108) | 72.2 (26) | 73.9 (82) | 0.038 | 0.845 |
| Cephalosporin | |||||
| Cefazolin | 31.1 (47) | 33.3 (12) | 30.4 (35) | 0.107 | 0.743 |
| Ceftazidime | 59.7 (92) | 55.6 (20) | 61.0 (72) | 0.342 | 0.559 |
| Cefotaxime | 39.9 (61) | 30.6 (11) | 42.7 (50) | 1.703 | 0.192 |
| Carbapenem | |||||
| Imipenem | 91.9 (143) | 91.7 (33) | 90.9 (110) | 0.00 | 1.000 |
| Quinolone | |||||
| Levofloxacin | 87.8 (130) | 75.0 (27) | 92.0 (103) | 5.837 | 0.016 |
| Ciprofloxacin | 86.1 (130) | 77.8 (28) | 88.7 (102) | 2.730 | 0.099 |
| Aminoglycoside | |||||
| Amikacin | 96.5 (138) | 94.3 (33) | 97.2 (105) | 0.676 | 0.770 |
| Gentamicin | 76.8 (116) | 63.9 (23) | 80.9 (93) | 4.440 | 0.035 |
| Others | |||||
| ESBL (+),% (n) | 53.3 (72) | 66.7 (22) | 49.0 (50) | 3.120 | 0.077 |
Partial strains were not tested for sensitivity to this drug; the denominator inside parentheses comprises the actual bacterial strains tested for sensitivity to this drug. ESBL: extended-spectrum β-lactamases.