Optimization of 25% Sulfosalicylic Acid Protein-to-Creatinine Ratio for Screening of Low-Grade Proteinuria

Table 3

Patient data for the calculation of performance characteristics of the 25% sulfosalicylic acid protein concentration versus pyrogallol red protein concentration.

	Diseased (PGR protein value ≥20 mg/dL)	Nondiseased (PGR protein value <20 mg/dL)
25% SSA (protein value ≥20 mg/dL)	45	1
25% SSA (protein value <20 mg/dL)	7	28

SSA: sulfosalicylic acid. PGR: pyrogallol red.