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Table 1 Comparison of the age and gender between mixed cholesterol GS and black pigment GS

From: Can the type of gallstones be predicted with known possible risk factors?: a comparison between mixed cholesterol and black pigment stones

Description Age at presentation (mean ± SD) years
Mixed cholesterol GS Black pigment GS P value
Total group 43.58 ± 11.80 45.00 ± 12.65 0.087*
Females 41.97 ± 09.81 46.10 ± 11.20 0.117*
Males 54.20 ± 18.86 51.25 ± 08.23 0.934ψ
  1. *Two sample t test.
  2. ψMann Whitney U test.