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

Table 2

Characteristics of included papers (in pediatric population).

Author	Area of origin	Population	Year of publication	Diagnosed criteria	Number of investigated people	Number of patients	Quality score
Xu et al. [18]	Guangdong Province	2–6 years	2008	Rome III	1022	32	4
Zhou et al. [77]	Guangdong Province	6-18 years	2010	Rome III	2075	130	5
Zhou et al. [78]	Shanghai City	10–18 years	2008	Rome II	51956	13467	5
Wang et al. [79]	Beijing City	2–14 years	2003	<3 BMs/week or hard	1001	38	5
Liu et al. [80]	Chengdu City	2–7 years	2007	Strain or hard or <3 BMs/week	1132	54	3
Hu [81]	Xian City	2–12 years	2003	Strain or hard or <3 BMs/week	1001	44	4
Zhang et al. [82]	Five cities in north	4–14 years	2010	Rome III	19286	913	4
M. F. Chan and Y. L. Chan [13]	Hong Kong	3–5 years	2010	<3 BMs/week	383	28	6
Lee et al. [14]	Hong Kong	3–5 years	2008	Rome II	368	106	6
Ip et al. [15]	Hong Kong	3–5 years	2005	Rome II	561	166	5
Liang and Song [83]	Guangdong Province	6–8 months	2003	Strain or hard or <3 BMs/week	287	78	3
Liu et al. [84]	Shanghai City	0–24 months	2009	Rome III	5030	690	4
Tam et al. [17]	Hong Kong	6–15 years	2012	Rome III	2318	282	5
Zhou et al. [16]	Shanghai City	12–18 years	2011	Rome III	3671	915	6