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Table 5 Agreement between beach management that result from E. coli culture testing and, as the gold standard, enterococci qPCR testing

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

  Prior day sample Same day sample
Beach n Description, Kappa (95% LCL, UCL) n Description, Kappa (95% LCL, UCL)
1 105 None, 0.00 (−0.13, 0.14) 106 Minimal, 0.26 (0.10, 0.41)
2 40 undefined 40 undefined
3 44 None, 0.13 (−0.25, 0.52) 44 None, 0.13 (−0.25, 0.52)
4 43 undefined 43 undefined
5 46 None, −0.08 (−0.18, 0.02) 46 None, 0.25 (−0.04, 0.54)
6 100 None, 0.14 (−0.05, 0.32) 103 Weak, 0.44 (0.23, 0.64)
7 94 Inverse, −0.07 (−0.12, −0.02) 96 None, 0.07 (−0.16, 0.29)
8 102 None, −0.02 (−0.16, 0.12) 104 None, 0.14 (−0.05, 0.33)
9 102 None, −0.08 (−0.18, 0.03) 104 None, 0.11 (−0.05, 0.26)
ALL 676 None, 0.01 (−0.04, 0.07 686 Minimal, 0.22 (0.14, 0.30)
  1. Left half of the table: agreement between Day1 qPCR results and Day0 E. coli culture results. Right half of the table: agreement between Day0 E. coli culture results and Day0 qPCR results. “Undefined”: no qPCR exceedance