Epidemiology Characteristics of Constipation for General Population, Pediatric Population, and Elderly Population in China

Table 1

Characteristics of included papers (in general population).

Author	Area of origin	Population	Year of publication	Diagnosed criteria	Number of investigated people	Number of patients	Quality score
Zhao et al. [10]	Five cities in China	18–80 years	2011	Rome II	16078	948	7
Cheng et al. [6]	Hong Kong	18–80 years	2003	Rome II	3282	458	7
Wei et al. [11]	Guangzhou City	>18 years	2001	Rome II	2892	108	5
Xiong et al. [8]	Guangdong Province	18–80 years	2004	Rome II	3931	159	6
Shen et al. [68]	Shanghai City	18–97 years	2012	Rome III	7648	211	4
Kan et al. [9]	Tianjin City	>18 years	2003	<3 BMs/week	7220	838	5
Tang et al. [69]	Anhui Province	>18 years	2008	Rome III	3709	139	4
Zuo and Han [70]	Henan Province	2–92 years	2012	Rome III	6102	1108	4
Shi et al. [7]	Xinjiang Autonomous Region	>10 years	2010	Rome II	1354	285	4
Lv et al. [71]	Nanchang City	10–91 years	2005	Rome II	3745	122	4
Guo et al. [72]	Beijing City	18–70 years	2001	Rome II	2486	151	6
Xiang et al. [73]	Chongqing City	>18 years	2004	Rome II	1492	47	4
Zhang et al. [74]	Sichuan Province	11–90 years	2008	Rome II	2912	96	5
Zhang et al. [75]	Henan Province	General population	2008	<3 BMs/week	1838	163	4
Liu et al. [76]	Hangzhou City	1 y–99 years	2004	<2 BMs/week	5107	899	4