Risk factors associated with symptomatic cholelithiasis in Taiwan: a population-based study

BMC Gastroenterology

Table 1 Age and Gender Characteristics of the Study Population^a

	Symptomatic Cholelithiasis
	Yes (n = 3725)	No (n = 11175)
Age (year)	55.9 ± 15.9	55.9 ± 15.9
Male	1621 (43.5%)	4863 (43.5%)
Female	2104 (56.5%)	6312 (56.5%)

^a The average ages and gender percentages for the case and control groups are identical, because individuals in the control group were age- and gender-matched to individuals in the case group.

ISSN: 1471-230X