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Table 3 Malaria odds ratios associated with distance to elevation categories

From: Topography-derived wetness indices are associated with household-level malaria risk in two communities in the western Kenyan highlands

   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
  1. 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.