Spatial distribution patterns of anorectal atresia/stenosis in China: Use of two-dimensional graph-theoretical clustering

Table 1 Average incidences of anorectal atresia/stenosis in different provinces, municipal cities or autonomous regions of China from 2001 to 2005

Province/Autonomous region/Municipal city	Perinatal births	Cases	Average incidence (per 10 000)
Liaoning	79 760	39	4.89
Zhejiang	111 690	54	4.83
Guangdong	127 648	61	4.78
Chongqing	60 979	28	4.59
Beijing	114 741	47	4.10
Guangxi	64 444	26	4.03
Tianjin	62 542	25	4.00
Anhui	100 631	36	3.58
Fujian	95 970	34	3.54
Ningxia	65 064	23	3.53
Jiangsu	149 984	52	3.47
Jilin	112 606	38	3.37
Shanxi	76 653	24	3.13
Henan	126 082	39	3.09
Hubei	59 964	18	3.00
Hebei	130 441	39	2.99
Gansu	61 629	18	2.92
Hunan	85 919	25	2.91
Heilongjiang	71 224	20	2.81
Hainan	54 234	14	2.58
Shandong	164 141	42	2.56
Guizhou	58 695	15	2.56
Sichuan	88 783	22	2.48
Shanghai	144 361	34	2.36
Inner Mongolia	63 061	14	2.22
Yunnan	85 398	17	1.99
Jiangxi	84 015	15	1.79
Xinjiang	56 214	10	1.78
Shaanxi	64 634	11	1.70
Qinghai	36 666	6	1.64
Tibet	12 194	0	0.00
Total	2 670 367	846	3.17