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. 2015 Apr 8;10(4):e0121537. doi: 10.1371/journal.pone.0121537

Table 3. Pb2+ and Cd2+ concentration of cholesterol and pigment gallstone.

Element Cholesterol GS Mean ± SD Pigment GS Mean ± SD P value *
Lead (μg/g) 18.42 ± 33.80 (n = 14) 26.72 ± 23.49 (n = 20) 0.039
Cadmium (μg/g) 0.16 ± 0.53 (n = 14) 0.26 ± 0.39 (n = 20) 0.143

*—Two sample t test