Table 1.
Frequency and percentage (in parentheses) of WHO-confirmed cases of H5N1 and H7N9 by level of poultry contact in the case population, the sensitivity analysis and the case subset, to 30 September 2014
| Contact type | H5N1 | H7N9 |
|---|---|---|
| Case population | ||
| Unknown | 217 (32·0) | 191 (42·3) |
| Zero | 2 (0·3) | 3 (0·7) |
| Unspecified contact | 146 (21·5) | 195 (43·1) |
| Low (indirect) | 119 (17·6) | 22 (4·9) |
| Medium | 142 (20·9) | 32 (7·1) |
| High | 52 (7·7) | 9 (2·0) |
| Medium + high (direct) | 194 (28·6) | 41 (9·1) |
| Total | 678 | 452 |
| Sensitivity analysis | ||
| Indirect + unspecified contact | 265 (39·1) | 218 (48·2) |
| Direct + unspecified contact | 340 (50·1) | 236 (52·2) |
| Indirect + proportional distribution of unspecified contact* | 170·3 (25·1) | 76·7 (17·0) |
| Direct + proportional distribution of unspecified contact* | 288·7 (42·6) | 181·3 (40·1) |
| Case subset | ||
| Unknown | 15 (8·6) | 7 (10·8) |
| Zero | 3 (1·7) | 3 (4·6) |
| Low (indirect) | 34 (19·4) | 29 (44·6) |
| Medium | 87 (49·7) | 18 (27·7) |
| High | 36 (20·6) | 8 (12·3) |
| Medium + high (direct) | 123 (70·3) | 26 (40·0) |
| Total | 175 | 65 |
* Unspecified contact cases were distributed to indirect and direct contact categories in same proportions as original indirect and direct contact categories in case population.