Table 2

Malaria odds ratios associated with distance to wetness categories


Controlling for person-time and year
 Controlling for person-time, year, and elevation


Wetness category
 Wetness values
 OR
 95% CI
 OR
 95% CI


for a 100 m increase in distance
 for a 100 m increase in distance
Kipsamoite
1 (driest)
 2.9–4.8
 1.084
 1.046
 1.123
 1.065
 1.005
 1.129
2
 4.8–6.7
 1.078
 0.879
 1.322
 0.812
 0.610
 1.079
3
 6.7–8.6
 0.204
 0.060
 0.695
 0.295
 0.089
 0.974
4
 8.6–10.5
 1.031
 0.810
 1.312
 1.253
 0.938
 1.674
5
 10.5–12.4
 1.033
 0.868
 1.230
 1.103
 0.923
 1.318
6
 12.4–14.3
 0.940
 0.818
 1.080
 1.066
 0.915
 1.243
7
 14.3–16.2
 0.894
 0.817
 0.978
 0.993
 0.874
 1.128
8
 16.2–18.1
 0.882
 0.815
 0.953
 0.924
 0.841
 1.016
9
 18.1–20.0
 0.870
 0.812
 0.934
 0.892
 0.827
 0.963
10 (wettest)
 20.0–21.8
 0.920
 0.885
 0.957
 0.932
 0.894
 0.972
Kapsisiywa
1 (driest)
 4.4–6.3
 0.987
 0.902
 1.080
 0.971
 0.883
 1.067
2
 6.3–8.2
 0.749
 0.515
 1.089
 0.684
 0.465
 1.006
3
 8.2–10.1
 1.070
 0.752
 1.524
 1.106
 0.776
 1.575
4
 10.1–12.0
 1.003
 0.895
 1.125
 1.027
 0.905
 1.165
5
 12.0–13.9
 0.972
 0.896
 1.055
 0.982
 0.899
 1.072
6
 13.9–15.8
 0.932
 0.858
 1.011
 0.936
 0.860
 1.019
7
 15.8–17.7
 0.929
 0.862
 1.002
 0.933
 0.863
 1.009
8
 17.7–19.6
 0.924
 0.856
 0.997
 0.927
 0.853
 1.007
9
 19.6–21.5
 0.917
 0.854
 0.984
 0.909
 0.838
 0.987
10 (wettest)
 21.5–23.4
 0.903
 0.857
 0.953
 0.894
 0.841
 0.950

Odds ratios for the presence of any household malaria in 2003–2004 associated with 100 m increases in distance between houses and the nearest 10 m2 grid-cell in each of ten wetness categories.

Cohen et al. Malaria Journal 2008 7:40   doi:10.1186/1475-2875-7-40

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