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Table 1 General descriptive overview of the composition of the gallstone samples:

From: Predictors of gallstone composition in 1025 symptomatic gallstones from Northern Germany

Substance Main
(> 30%)
Intermediate
(10–30%)
Trace
(< 10%)
Qualitative presence
Cholesterol 93.3% 0.8% 0.9% 95.0%
Bilirubin 5.5% 4.7% 19.8% 30.0%
Calcium (any mineral)     10.0%
Ca5(PO4)3(F,Cl,OH) – Apatite 1.2% 0.4% 1.5% 3.1%
CaCO3 – Aragonite 1.3% 0.1% 0.1% 1.5%
CaCO3 – Calcite 1.0% 0.4% 0.3% 1.7%
CaCO3 – mineral not defined 1.3% 0.7% 1.7% 3.7%
Magnesium     
Struvite (NH4)MgPO4·6H2O Not observed 0.1% Not observed 0.1%
Palmitate/Stearate 0.1% 0.3% 0.2% 0.7%
Polysaccharide 0.1% 0.2% 0.3% 0.6%
  1. The frequency of detection of either of the substances in the 2148 FTIR spectra obtained from the 1074 gallstones is given in the left column for the quantitative classifications of "Main", "Intermediate" and "Trace" components. The term "Qualitative presence" refers to the detection of the respective substance in any of the categories. Note, that numbers will not sum to 100% due to presence of multiple stone components. All bilirubinate salts were summarized as "bilirubin", i.e. the different bilirubin salts were not differentiated.