Table 1.
Data from each hospital, detailing the number of hospital-apportioned C. difficile cases, the number of PIIs, and the number of PIIs confirmed as outbreaks by the two typing methodsa
| Hospital | Study arm | No. of mandatory reported hospital-apportioned C. difficile cases | Rate of C. difficile cases per 10,000 patient days | No. of PIIs | Mean (min, max) no. of cases per PII | No. of PIIs confirmed as outbreaks by ribotyping | No. of PIIs confirmed as outbreaks by MLVA |
|---|---|---|---|---|---|---|---|
| A | Control | 32 | 1.7 | 3 | 3.0 (2, 4) | 1 | 1 |
| B | Control | 108 | 2.8 | 10 | 4.4 (2, 9) | 7 | 7 |
| C | Control | 48 | 2.1 | 5 | 2.6 (2, 3) | 1 | 1 |
| D | Control | 52 | 2.1 | 8 | 2.0 (2, 4) | 2 | 1 |
| E | Control | 246 | 3.5 | 58 | 3.2 (2, 10) | 11 | 5 |
| F | Control | 131 | 3.0 | 8 | 2.5 (2, 4) | 2 | 2 |
| G | Control | 156 | 3.1 | 8 | 5.8 (2, 10) | 5 | 4 |
| H | Control | 95 | 2.4 | 19 | 2.6 (2, 6) | 3 | 1 |
| I | Test | 63 | 2.7 | 3 | 3.3 (2, 4) | 1 | 1 |
| J | Test | 199 | 3.1 | 33 | 2.7 (2, 10) | 9 | 7 |
| K | Test | 46 | 4.3 | 3 | 3.3 (2, 5) | 1 | 1 |
| L | Test | 57 | 1.5 | 11 | 2.5 (2, 6) | 2 | 2 |
| M | Test | 74 | 1.8 | 15 | 2.9 (2, 8) | 5 | 5 |
| N | Test | 108 | 2.1 | 15 | 3.3 (2, 7) | 5 | 4 |
| O | Test | 167 | 3.5 | 46 | 3.7 (2, 15) | 20 | 17 |
| P | Test | 100 | 2.6 | 0 | 0 (NA, NA) | 0 | 0 |
a
Six PIIs contained two different outbreaks. NA, not available; min, minimum; max, maximum.