Diagnostic accuracy of duplicate Kato-Katz thick smears and the FLOTAC basic technique at baseline.

Prevalence, quartiles, arithmetic mean and geometric mean eggs per gram of stool (EPG), and sensitivity with 95% confidence intervals (CI), as determined from stool samples examined with duplicate Kato-Katz thick smears and the FLOTAC basic technique at baseline in 343 school children from Kinyasini and Kilombero primary schools, Zanzibar, in March 2009. The diagnostic ‘gold’ standard was derived by the combined results of duplicate Kato-Katz thick smears and the FLOTAC basic technique.aDifferences in sensitivities determined by the McNemar test on positive individuals: P = 0.012.bκ measure of agreement taking into account positive and negative individuals: κ = 0.74.cDifferences in sensitivities determined by the McNemar test on positive individuals: P = 0.006.dκ measure of agreement taking into account positive and negative individuals: κ = 0.44.eDifferences in sensitivities determined by the McNemar test on positive individuals: P = 0.098.fκ measure of agreement taking into account positive and negative individuals: κ = 0.68.