Exposure to Systemic Antibiotics in Days 29-180 Before Admission Among 253 Subjects With Aplastic Anemia and 1,174 Controls
| Drug . | Subjects: No. (%) . | Controls: No. (%) . | Crude Relative Risk . | Multivariate Relative Risk (95% confidence interval) . |
|---|---|---|---|---|
| Chloramphenicol | 4 (2) | 8 (1) | 2.3 | 2.7 (0.7-10) |
| Sulfonamides | 5 (2) | 3 (0.3) | 7.9* | — |
| Tetracyclines | 5 (2) | 13 (1) | 1.8 | 1.8 (0.6-5.6) |
| Penicillins | 6 (2) | 25 (2) | 1.1 | 1.0 (0.4-2.7) |
| Ampicillin/amoxicillin | 13 (5) | 48 (4) | 1.3 | 1.3 (0.6-2.8) |
| Other named antibiotics† | 2 (1) | 9 (1) | — | — |
| Unspecified antibiotic | 23 (9) | 71 (6) | — | — |
| Drug . | Subjects: No. (%) . | Controls: No. (%) . | Crude Relative Risk . | Multivariate Relative Risk (95% confidence interval) . |
|---|---|---|---|---|
| Chloramphenicol | 4 (2) | 8 (1) | 2.3 | 2.7 (0.7-10) |
| Sulfonamides | 5 (2) | 3 (0.3) | 7.9* | — |
| Tetracyclines | 5 (2) | 13 (1) | 1.8 | 1.8 (0.6-5.6) |
| Penicillins | 6 (2) | 25 (2) | 1.1 | 1.0 (0.4-2.7) |
| Ampicillin/amoxicillin | 13 (5) | 48 (4) | 1.3 | 1.3 (0.6-2.8) |
| Other named antibiotics† | 2 (1) | 9 (1) | — | — |
| Unspecified antibiotic | 23 (9) | 71 (6) | — | — |