Number of errors for each type of error
| Type of errors | No. (%) |
|---|---|
| Incorrect interpretation of hemagglutination grade | 4,159 (88.8) |
| Errors in result entry | 182 (3.9) |
| Limitations of test methods | 146 (3.1) |
| Specimen change | 157 (3.4) |
| Others | 37 (0.8) |
| Total | 4,681 (100.0) |