Table 3.
Effects from geostatistical models estimating prevalence of A. lumbricodes, T. trichiura and hookworm in Rwanda in 2014. Bolded text displays statistically significant associations.
| Coefficient |
A. lumbricoides Mean (95% CI) b |
T. trichiura Mean (95% CI) b |
Hookworm Mean (95% CI) b |
|---|---|---|---|
| Intercept | −1.651(−3.981, 0.214) | −2.891 (−4.417, −1.121) | −4.585 (−7.184, −2.656) |
| Male (versus female) | −0.032 (−0.150, 0.086) | 0.036 (−0.098, 0.167) | −0.043 (−0.257, 0.159) |
| Age 12 to 14 years old (versus 9 to 11 years old) | 0.357 (−0.502, 1.248) | 0.998 (0.015, 2.024) | 0.996 (−0.890, 3.573) |
| 15 to 18 years old (versus 9 to 11 years old) | 0.316 (−0.651, 1.323) | 0.791(−0.308, 1.931) | 0.542 (−1.703, 3.192) |
| Normalized difference vegetation index a | 0.166 (0.015, 0.322) | 0.083 (−0.088, 0.249) | −0.117 (−0.337, 0.089) |
| Land surface temperature a | −0.080 (−0.251, 0.100) | 0.045 (−0.141, 0.230) | −0.065 (−0.288, 0.178) |
| Normalized difference water index a | 0.296 (0.107, 0.491) | 0.263 (0.074, 0.450) | 0.308 (0.054, 0.583) |
| φ Phi (rate of decay) c | 3.154 (0.988, 5.696) | 2.912 (0.541, 5.520) | 7.911 (3.343, 13.610) |
| σ2Sigma (variance) | 5.888 (2.788, 13.550) | 6.639 (2.818, 23.750) | 2.268 (1.336, 3.910) |
| Tau (precision) | 0.210 (0.074, 0.359) | 0.197 (0.042, 0.355) | 0.475 (0.256, 0.748) |
Results based on Bernoulli Bayesian Geostatistical Model (Burn-in: 5000. Sample: 10,000); a Variables were standardized to have mean = 0 and standard deviation = 1; b CI = Credible Interval; c Measured in decimal degrees; 3/phi determines cluster size; one decimal degree is approximately 111 km at the Equator (the size of the radii of the clusters).