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Table 3 The sigma metrics and quality goal index ratio for Total cholesterol, Urea, and Total Protein

From: Applicability of commercial clinical chemistry test kits for horse serum

Analyte Bias (%) CV (%) TEo (%) TEa (%) Sigma QGI Problem
Total cholesterol 0.54 2.08 4.7 20 9.34 0.17 None
Urea 2.68 1.89 6.46 12 4.9 0.95 Impression and inaccuracy
Total protein 0.1 1.63 3.36 10 6.1 1.37 None