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. 2004 Apr;42(4):1631–1636. doi: 10.1128/JCM.42.4.1631-1636.2004

TABLE 3.

Characterization of core Ag external controls over 11 runsa

Control Acceptable core Ag concn (pg/ml) Core Ag concn (pg/ml)
CV (%)
Mean SD
Negative ≤1.1 0 0 0
Low positive 3.0-12.7 4.7 0.67 14.3
High positive 20.5-44.5 26.7 1.74 6.5
a

All three controls were valid per quality control criteria for 11 runs.