Table 3

Malaria odds ratios associated with distance to elevation categories


Controlling for person-time and year
 Controlling for person-time, year, and elevation
Elevation category
 Elevation values
 OR
 95% CI
 OR
 95% CI


for a 100 m increase in distance
 for a 100 m increase in distance
Kipsamoite
1 (highest)
 2085–2102
 1.022
 1.004
 1.040
 1.001
 0.978
 1.024
2
 2068–2085
 1.020
 1.000
 1.040
 0.991
 0.964
 1.018
3
 2051–2068
 1.042
 1.020
 1.063
 1.030
 0.994
 1.067
4
 2034–2051
 1.051
 1.029
 1.073
 1.048
 1.010
 1.087
5
 2017–2034
 1.078
 1.042
 1.117
 1.058
 1.003
 1.115
6
 2000–2017
 1.061
 1.005
 1.119
 1.013
 0.950
 1.081
7
 1982–2000
 0.962
 0.870
 1.064
 0.979
 0.900
 1.066
8
 1965–1982
 0.855
 0.776
 0.943
 0.919
 0.781
 1.080
9
 1948–1965
 0.905
 0.851
 0.962
 0.949
 0.837
 1.077
10 (lowest)
 1931–1948
 0.957
 0.934
 0.981
 0.976
 0.932
 1.022
Kapsisiywa
1 (highest)
 1996–2005
 0.995
 0.989
 1.002
 0.985
 0.975
 0.994
2
 1986–1996
 0.995
 0.988
 1.002
 0.984
 0.974
 0.994
3
 1977–1986
 1.014
 1.002
 1.025
 1.018
 1.003
 1.034
4
 1967–1977
 1.012
 0.992
 1.032
 1.011
 0.984
 1.040
5
 1958–1967
 1.005
 0.978
 1.033
 0.994
 0.958
 1.032
6
 1949–1958
 1.001
 0.970
 1.034
 0.991
 0.954
 1.029
7
 1939–1949
 0.944
 0.871
 1.023
 0.949
 0.876
 1.028
8
 1930–1939
 0.953
 0.879
 1.033
 0.959
 0.861
 1.069
9
 1920–1930
 0.999
 0.984
 1.014
 1.007
 0.987
 1.028
10 (lowest)
 1911–1920
 1.000
 0.989
 1.012
 1.008
 0.992
 1.024

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 elevation categories.

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