Table 3

Positive and negative test results predicted for our patients if the best-performing rapid NAAT and POC tests had been used

Actual and predicted performance of different chlamydia assays
Actual outcomes*GeneXpert best†GeneXpert worst†CRT best†CRT worst†
True +ve10098–9997–988741
False +ve027191
True −ve17371737173517301546
False −ve1–22–31359
Actual and predicted performance of different gonorrhoea assays
Actual outcomes*GeneXpert best†GeneXpert worst†GC Check
best†
GC Check
worst†
True +ve10098–100967054
False +ve0592137
True −ve45754575457044834438
False −ve0–243046
  • *The actual results obtained in our patients using the BD ProbeTec assay.

  • †Predicted outcomes if these assays had been used in the clinic.

  • CRT, chlamydia rapid test; GC, gonococcal infection; NAAT, nucleic acid amplification technique; POC, point-of-care.