Table 1. Epidemiological characteristics of patients infected with H7N9 from rural and urban areas of Zhejiang, China.
| Characteristics | Rural cases (n = 16) | Urban cases (n = 30) | P value | |
| Age and sex | Median age (y) | 61.5 | 60 | |
| Interquartile range | 12.25 | 32.75 | ||
| Age (20–39) | 1 (6%) | 7 (23%) | 0.603 | |
| Age (40–59) | 6 (38%) | 8 (27%) | ||
| Age (60–79) | 9 (56%) | 13 (43%) | ||
| Age (80+) | 0 (0) | 2 (7%) | ||
| Male | 5 (31%) | 24 (80%) | 0.001 | |
| Female | 11 (69%) | 6 (20%) | ||
| Exposure history | No poultry exposure (%) | 1 (7) | 9 (36) | 0.038 |
| Poultry exposure history (%) | 14 (93) | 16 (64) | ||
| Chickens (%) | 11 (79) | 13 (81) | 1.000 | |
| Ducks (%) | 3 (21) | 3 (19) | 1.000 | |
| Pigeons (%) | 1 (7) | 1 (6) | 1.000 | |
| Bird (%) | 0 | 1 (6) | ||
| Exposure frequency | ||||
| Every day before onset (%) | 5 (36) | 5 (31) | ||
| <3 days before onset (%) | 4 (29) | 2 (13) | ||
| 3–7 days before onset (%) | 4 (29) | 6 (38) | ||
| >7 days before onset (%) | 1 (7) | 3 (19) | ||
| Type of exposure to poultry | ||||
| Buying poultry (%) | 6 (43) | 9 (56) | 0.715 | |
| Visiting poultry market (%) | 1 (7) | 2 (13) | 1.000 | |
| Breeding poultry (%) | 6 (43) | 3 (19) | 0.236 | |
| Killing and cleaning poultry (%) | 3 (31) | 1 (6) | 0.315 |