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Table 4

Performance of serology and microscopic examination of stools for the diagnosis of strongyloidiasis (N = 20 proven/probable and 321 negative/possible cases).

Microscopic examination of stools
S. stercoralis serology
Statistical significance
% (n/N) 95% CI % (n/N) 95% CI
Sensitivity 45 (9/20) 26–66 100 (20/20) 81–100 **
Specificity 100 (321/321) 99–100 97 (311/321) 94–98 **
PPV 100 (9/9) 66–100 67 (20/30) 49–81 ns
NPV 97 (321/332) 94–98 100 (311/311) 99–100 ***

PPV: positive predictive value, NPV: negative predictive value, ns: not significant, **p < 0.01, ***p < 0.001 (Fisher’s exact test).

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