Table 1.
Baseline Demographic Characteristics of the Study Population
| Characteristic | 2001–2002 (n = 20) | 2014 (n = 20) | OR (95% CI) P Value |
|---|---|---|---|
| Sex, No. (%) | |||
| Male | 12 (60) | 11 (55) | 1 |
| Female | 8 (40) | 9 (45) | 1.22 (.29–5.16) |
| Ratio (M/F) | 1.5 | 1.22 | |
| Age, y | |||
| Mean | 6.37 | 19.5 | .00048 |
| Range | (0.7–16.1) | (1.9–44.6) | |
| Parasite density/µL | |||
| Mean | 11757.5 | 6283.2 | .0038 |
| Range | (150–29450) | (25–45000) | |
| Location, No. (%) | |||
| Dielmo | 10 (50) | 11 (55) | |
| Ndiop | 10 (50) | 9 (45) | |
| mEIR | |||
| Dielmo | 29.6a | 2.19 | <.0001 |
| Ndiop | 7.9b | 0.0c | .06 |
| IR, mean (95% CI) | |||
| Dielmo | 2.25 (2.13–2.37) | 0.136 (0.099–0.173) | <.0001 |
| Ndiop | 1.98 (1.865–2.087) | 0.104 (0.072–0.136) | <.0001 |
Characteristics of the sample populations from Dielmo and Ndiop are listed for the 2 time periods described in this study, 2001–2002, and 2014. Kruskal–Wallis and Fisher exact tests were used to compare distribution of quantitative and qualitative variables respectively between subgroups. For all statistical tests, α = .05.
Abbreviations: CI, confidence interval; IR, annual incidence rate (number of episodes per person per year); mEIR, mean entomological inoculation rate (number of infected bites per person per year, averaged over the year); ND, not determined; OR, odds ratio.
aFrom previously published data [5].
bFrom previously published data [6].
cUnpublished data.