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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