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Table 2 qPCR data quality summary

From: Monitoring urban beaches with qPCR vs. culture measures of fecal indicator bacteria: Implications for public notification

Data quality metric

2015

2016

Accuracy in composite standard curves

Number of standard curves

9

9

R2

0.996

0.999

Amplification efficiency

1.933

2.097

Precision: calibrator samples CV

Number of samples

55

71

Enterococci target CV

2.05%

1.33%

SPC target CV

1.11%

1.41%

Inhibition

Frequency

Percent

Frequency

Percent

ΔCtSPC < 2

536

99.26

1210

96.3%

2 ≤ ΔCtSPC < 3

2

0.37%

32

2.5%

ΔCtSPC ≥ 3

2

0.37%

14

1.1%

Total

540

100%

1258

100%

  1. CV coefficient of variation