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Probit analysis of 1998 WHO multicentre study. The discriminating dose is 2× the LD99. Abbreviations: LD = lethal dose; CI = confidence interval; DD = discriminating dose; DoF = degrees of freedom.
| Deltamethrin | Permethrin | |
|---|---|---|
| Number exposed | 8258 | 9582 |
| LD99 (95% CI) | 0.05 (0.023–1.166) | 0.73 (0.452–2.067) |
| Calculated DD | 0.1 | 1.46 |
| Chi-square 1 | 2215.41 | 2055.49 |
| Heterogeneity (DoF) | 39.56 (56) | 32.12 (64) |
| Current WHO DD | 0.05 | 0.75 |
1 Chi-square provides a measure of fit.
