Table 4.
Results of the generalized linear models (GLMs) analysing the influence of geography, test type, year and annual parasite incidence (API) on the positivity rate of malaria diagnostics in the Solomon Islands during the years 2017–2019 for Plasmodium falciparum and Plasmodium vivax
| Explanatory factors | P. falciparum | P. vivax | ||||
|---|---|---|---|---|---|---|
| χ2(a) | dfb | P valuec | χ2(a) | dfb | P valuec | |
| National level model | ||||||
| Test | 1665 | 1 | < 2e-16* | 1036.1 | 1 | < 2e-16* |
| Year | 621.2 | 1 | < 2e-16* | 3709.8 | 1 | < 2e-16* |
| API | 13184 | 1 | < 2e-16* | 12309.4 | 1 | < 2e-16* |
| Province level model | ||||||
| Province | 15278.7 | 8 | < 2e-16* | 25686 | 8 | < 2e-16* |
| Test | 1534.6 | 1 | < 2e-16* | 956.5 | 1 | < 2e-16* |
| Year | 766.3 | 1 | < 2e-16* | 3976.1 | 1 | < 2e-16* |
| API | 2179.4 | 1 | < 2e-16* | 1190.1 | 1 | < 2e-16* |
| Health zone level model | ||||||
| Health zone | 27439.7 | 43 | < 2e-16* | 44317 | 43 | < 2e-16* |
| Test | 211.3 | 1 | < 2e-16* | 0 | 1 | 0.4857 |
| Year | 162 | 1 | < 2e-16* | 4941 | 1 | < 2e-16* |
| API | 4474.9 | 1 | < 2e-16* | 2077 | 1 | < 2e-16* |
aχ2, Chi-square values that measure the difference between observed and expected value
bdf, degrees of freedom
c*P < 0.05, indicates significant influence on the choice of diagnostic test type