Table 2.
Comparison of Change From Baseline Prevalence and Mean Intensity for Villages Inside the Hotspot at Year 1 to Villages Outside the Hotspot, 9- to 12-Year-Olds
| Comparison | All Villages (N = 150) | P | Matched Villages (N = 42) | P |
|---|---|---|---|---|
| Prevalence | PR (95% CI) | PR (95% CI) | ||
| Change from year 1 to year 2 | 1.15 (1.05–1.26) | .0033 | 1.08 (0.93–1.25) | .2944 |
| Change from year 1 to year 3 | 1.46 (1.29–1.64) | <.0001 | 1.49 (1.16–1.93) | .0022 |
| Change from year 1 to year 4 | 1.90 (1.61–2.24) | <.0001 | 2.14 (1.65–2.78) | <.0001 |
| Change from year 1 to year 5 | 2.20 (1.88–2.59) | <.0001 | 2.28 (1.57–3.31) | <.0001 |
| Mean intensity | AMR (95% CI) | AMR (95% CI) | ||
| Change from year 1 to year 2 | 1.07 (0.85–1.36) | .5585 | 0.94 (0.68–1.29) | .7043 |
| Change from year 1 to year 3 | 1.49 (1.12–1.99) | .0068 | 2.70 (1.69–4.31) | <.0001 |
| Change from year 1 to year 4 | 1.68 (1.17–2.42) | .0053 | 3.13 (1.97–5.00) | <.0001 |
| Change from year 1 to year 5 | 2.34 (1.70–3.22) | <.0001 | 2.46 (1.28–4.73) | .007 |
All 150 villages are included in first set of analyses, whereas matched villages includes villages inside the year 1 hotspot who were paired with a village outside the hotspot with a similar distance to Lake Victoria (<1 km of difference), baseline prevalence (<10% difference), and the same study arm. Results for prevalence analyses are reported as PRs of the change in prevalence from year 1 and as AMRs for the change in mean intensity from year 1.
Abbreviations: AMRs, arithmetic means ratio; CI, confidence interval; PR, prevelance ratio.