Table 3 Statistically significant spatio-temporal clusters of A(H7N9) human infections in China identified by use of the space-time permutation scan test with 5-days scanning unit (phase II)

Location

Ningbo, Shaoxing, Jiaxing, Zhuji, Hangzhou, Shanghai, Yiwu, Huzhou, Suzhou, Taizhou

Fuyang, Lu’an, Hefei, Xuzhou, Anqing, Tongling, Ma’anshan, Xuancheng, Nanjing, Huaian, Zhenjiang, Taian, Taizhou, Yancheng, Changzhou, Wuxi, Huangshan, Leping

Zhaoqing, Foshan, Jiangmen, Guangzhou

Province or region

Zhejiang, Jiangsu, Shanghai

Anhui, Jiangsu, Shandong, Jiangxi

Guangdong

Coordinates

29.86 N, 121.56 E

32.89 N, 115.81 E

23.06 N, 112.45 E

Radius (km)

194.90 km

453.14 km

80.49 km

Time frame

2014 1/12–1/31

2014 4/22–5/31

2014 2/16–3/2

Duration (days)

19

39

14

O^a

61

14

19

E^b

33.80

3.58

6.53

O / E^c

1.80

3.91

2.91

LLR^d / Test statistic

10.292886

8.856121

8.095875

P-value^e

0.0016

0.011

0.028