Table 3. Estimates of the net effect of LPM closures by comparing the reductions in the number of influenza A(H7N9) infections between study sites with and without closures, adjusting for similar season pattern of absolute humidity, China*.
| Study sites with LPM interventions | Reduction in no. infections, % (95% CI) |
|||||||
|---|---|---|---|---|---|---|---|---|
| Reference sites without LPM interventions |
Study sites with LPM interventions, R1 | Reference sites without LPM interventions, R2 | Difference in reduction, R1 – R2 | p value | ||||
| Site no. | Province | Cities | ||||||
| Site 1 | 1 | Jiangsu | Huaian (Huaian District, Qingpu District), Nantong (Haimen City, Rugao City), Xuzhou (Suining County), Yancheng (Dongtai City), Yangzhou (Hanjiang District) | 97.0 (93.0–100.0) | 52.0 (12.0–61.0) | 45.0 (32.0–88.0) | <0.001 | |
| Site 2 | 1 | 90.0 (88.0–94.0) | 57.0 (16.0–67.0) | 33.0 (21.0–78.0) | <0.001 | |||
| Site 3 | 1 | 90.0 (84.0–99.0) | 70.0 (42.0–76.0) | 20.0 (8.0–57.0) | <0.001 | |||
| Site 4 | 1 | 94.0 (89.0–99.0) | 49.0 (10.0–48.0) | 44.0 (30.0–89.0) | <0.001 | |||
| Site 5 | 1 | 98.0 (96.0–100.0) | 48.0 (20.0–58.0) | 51.0 (38.0–80.0) | <0.001 | |||
| Site 6 | 1 | 50.0 (32.0–74.0) | 32.0 (21.0–50.0) | 18.0 (10.0–23.0) | <0.001 | |||
| Site 14 | 1 | 93.0 (86.0–100.0) | 40.0 (27.0–63.0) | 52.0 (36.0–59.0) | <0.001 | |||
| Site 17 | 1 | 84.0 (78.0–94.0) | 46.0 (39.0–61.0) | 38.0 (33.0–39.0) | <0.001 | |||
| Site 13 | 2 | Hunan | Chenzhou (Beihu District, Yongxing County), Hengyang (Hengdong County, Shigu District, Zhuhui District), Loudi (Shuangfeng District), Shaoyang (Shaodong County, Xinning County, Xinshao County), Zhangjiajie (Yongding District) | 86.0 (81.0–87.0) | 85.0 (84.0–86.0) | 0.5 (−3.0 to 1.0) | 0.098 | |
*Similar seasonal patterns of absolute humidity had been observed among study sites with and without closures (e.g., study site 1–6, site 14, site 17, and reference site 1). LPM, live poultry market.