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Table 1 Age and Gender Characteristics of the Study Populationa

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

  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%)
  1. 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.