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Agreement expected by chance alone of LAMP and Kato-Katz technique.
| Kato-Katz (gold standard) | Total | ||
|---|---|---|---|
| Positive | Negative | ||
| LAMP | |||
| Positive | 18.2 | 12.8 | 31 |
| Negative | 8.8 | 0.2 | 9 |
| Total | 27 | 13 | 40 |
Percent agreement expected by chance alone = (18.2 + 0.2)/40 × 100 = 46%.
Kappa = ((percent agreement observed) − (percent agreement expected by chance alone))/(100% − (percent agreement expected by chance alone)) = (85 − 46)%/(100 − 46)% = 0.72%.
