Table 1.
Epidemiologic characteristics of patients with confirmed H7N9 infection in China from early 2013 to February 10, 2014.
| Characteristics | Confirmed H7N9 casesa | |||
|
|
Internet-based data (up to Dec 1, 2013) |
Li’s report (up to Dec 1, 2013) |
Most updated Internet-based data (up to Feb 10, 2014) |
|
| Total number of cases | 138 | 139 | 334 | |
| Age (years) |
|
|
|
|
|
|
Number of cases | 132 | 139 | 327 |
|
|
Median (IQRb) | 61 (48-73) | 61 (46-73) | 58 (41-69) |
|
|
<5 years, n/N (%) | 3/132 (2.3) | 4/139 (2.9) | 6/327 (1.8) |
|
|
≥ 65 years, n/N (%) | 55/132 (41.7) | 58/139 (41.7) | 111/327 (33.9) |
| Male sex, n/N (%) | 93/132 (70.5) | 98/139(70.5) | 219/327 (67.0) | |
| Area of residence, n/N (%) |
|
|
|
|
|
|
Urban | 83/110 (75.5) | 101/139 (72.6) | 186/278 (66.9) |
|
|
Rural | 27/110 (24.5) | 38/139 (27.3) | 92/278 (33.1) |
| Poultry worker, n/N (%) | 6/99 (6.1) | 9/139 (6.6) | 7/201 (3.5) | |
| Presence of underlying medical conditions, n/N (%) | 3/3 (100.0) | 79/108 (73.1) | 5/5 (100.0) | |
| Exposure to a symptomatic case within 2 week before illness onset, n/N (%) | 5/NEc (NE) | 5/120 (4.2) | 7d/NE (NE) | |
| Exposure to poultry, n/N (%) | 12/26 (46.0) | 107/131 (81.7) | 39/56 (69.6) | |
|
|
Chickens | 7/12 (58.3) | 88/107 (82.2) | 12/39 (30.8) |
|
|
Ducks | 3/12 (25.0) | 24/107 (22.4) | 4/39 (10.3) |
|
|
Pigeons | 1/12 (8.3) | 13/107 (12.1) | 1/39 (2.7) |
|
|
Quails | 1/12 (8.3) | 2/107 (1.9) | 1/39 (2.7) |
|
|
Pet birds | 1/12 (8.3) | 3/107 (2.8) | 1/39 (2.7) |
|
|
Direct contact with poultry | 9/12 (75.0) | 63/107 (58.9) | 17/39 (43.6) |
| Nucleic acid detection confirming, n/N (%) | 58/78 (74.4) | 89/139 (64.0) | 71/91 (78.0) | |
aUnless stated otherwise, data in the table provided are the number of patients with a certain characteristics, the total number of patients having data on that characteristic and the corresponding percentage.
bIQR: interquartile range
cNE: not estimable
dTwo cases in Zhejiang were not confirmed by February 10, 2014.