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Table 1 Performance of each diagnostic test, compared to the composite reference standard (CRS), defined as a positive result on one or more of the individual tests: Hain GenoQuick, BD CHROMagar, Cepheid Xpert SA Nasal Complete

From: Comparative assessment of methicillin resistant Staphylococcus aureus diagnostic assays for use in resource-limited settings

 

aCRSMRSA (+) (n = 27)

CRS MRSA (−) (n = 472)

Sensitivity

(%, 95 CI)

GenoQuick (n = 470)

 MRSA (+)

26

0

96 (81–100)

 MRSA (−)

1

443

CHROMagar (n = 500)

 MRSA (+)

19

0

70 (50–86)

 MRSA (−)

8

472

GeneXpert SA complete (n = 499)

 MRSA (+)

14

0

52 (32–71)

 MRSA (−)

13

473

  1. CI Confidence interval
  2. aA true positive culture was defined as MRSA detected by one or more of the three tests, and also called the composite reference standard (CRS)