The sensitivity, specificity, PPV and NPV of various microscopy methods, using culture as the gold standard.

PPV = positive predictive value; NPV = negative predictive value; FoV = fields of view.*Assumed that all smears read by the microscopist had 100 FoV reviewed per slide, as data on exact numbers read for positive smears were not recorded. Exact numbers of digital images of FoV reviewed were recorded and so these are exact.