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Sample estimates and inter-rater agreement (Kappa index) for the prevalence of parasitaemia above a specific density cutoff comparing two rater microscopy parasite density counts.
| Cut-off density/μl | Rater A | Rater B | Expected | Kappa index |
|---|---|---|---|---|
| (%) | (%) | (%) | ||
| 1000 | 14.0 | 14.5 | 15.0 | 0.82 |
| 2500 | 12.0 | 13.0 | 13.0 | 0.77 |
| 5000 | 13.0 | 14.5 | 14.5 | 0.69 |
| 10000 | 15.0 | 14.5 | 13.5 | 0.63 |
| 20000 | 13.5 | 14.0 | 15.0 | 0.58 |
| 30000 | 32.5 | 29.5 | 29.0 | 0.40 |
