PTH and cholelithiasis: Higher mean PTH levels in the blood were detected in patients reporting urinary tract stones (356.90 pg/mL vs. 296.42 pg/mL; p < 0.05), osteoporosis (356.03 pg/mL vs. 297.64 pg/mL; p < 0.05), and cholelithiasis (357 pg/mL vs. 298.52 pg/mL; p < 0.05).