Characteristics of incidents
| BWH n=4102 | KUH n=3084 | p Value* | ||
| Profession of reporter | Physician | 151 (3.7) | 163 (5.3) | 0.001 |
| Non-physician | 3951 (96.3) | 2921 (94.7) | ||
| Degree of injury | Major | 19 (0.5) | 24 (0.8) | 0.087 |
| Minor or none | 4083 (99.5) | 3060 (99.2) | ||
| Year | 2004 | 1933 (47.1) | 1414 (45.8) | 0.284 |
| 2005 | 2169 (52.9) | 1670 (54.2) |
Data are shown as n (%). Hypothesis testing was performed using Pearson χ2 tests.
BWH, Brigham and Women's Hospital; KUH, Kyoto University Hospital.