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Table 3 Adjusted estimated effect of ownership of mosquito net on malaria mortality in three models for Ifakara HDSS

From: Assessing the effects of mosquito nets on malaria mortality using a space time model: a case study of Rufiji and Ifakara Health and Demographic Surveillance System sites in rural Tanzania

  M1 M2 M3
IRR (95 % CI) IRR (95 % CI) IRR (95 % CI)
All age
 Intercept 0.0005 (0.00, 0.007) 0.0203 (0.00, 2.376) 0.0215 (0.00, 2.495)
 Mosquito nets 0.885 (0.830, 0.879) 0.879 (0.806, 0.959) 0.887 (0.812, 0.970)
 Annual rainfall 1.015 (0.999, 1.031) 1.008 (0.986, 1.030) 1.006 (0.983, 1.027)
 Average temperature 1.007 (0.996, 1.017) 0.993 (0.975, 1.009) 0.993 (0.974, 1.009)
 Mean NDVI 1.066 (1.016, 1.118) 1.031 (0.972, 1.0935) 1.022 (0.961, 1.086)
 Spatial random effect   87.4 (11.7, 347.2) 82.9 (10.9325.9)
 Temporal random effect   25.7 (5.3, 72.4) 24.7 (5.1, 69.9)
 Spatial–temporal random effect    18,607.1 (1277.5, 67, 205.5)
 DIC 1305.891 1226.043 1241.542
Under five
 Intercept 0.003 (0.00, 0.055) 0.010 (0.00, 1.208) 0.011 (0.00, 1.428)
 Mosquito nets 0.883 (0.812, 0.961) 0.899 (0.816, 0.995) 0.904 (0.818, 1.003)
 Annual rainfall 1.016 (0.995, 1.038) 1.013 (0.988, 1.039) 1.012 (0.987, 1.038)
 Average temperature 1.007 (0.993, 1.021) 0.999 (0.981, 1.017) 0.999 (0.980, 1.017)
 Mean NDVI 1.048 (0.983, 1.117) 1.026 (0.956, 1.099) 1.020 (0.949, 1.096)
 Spatial random effect   27,728.7 (3108.7, 87, 940.7) 27,988.6 (3083.7, 87,704.5)
 Temporal random effect   54.137 (6.794, 186.754) 47.28 (6.32, 160.28)
 Spatial–temporal random effect    18,164.1 (1237.6, 65, 880.6)
 DIC 1061.281 1047.046 1062.05
  1. The effect of rainfall was estimated for every 100-mm increase in mean total annual rainfall, and the effect of mosquito net for every 10 % increase in household ownership
  2. The effect of NDVI was estimated for every 0.1 increase in mean NDVI
  3. IRR incidence rate ratio; M 1 model without spatial and temporal random terms; M 2 model with spatial and temporal random terms; M 3 model with spatial and temporal random terms, and interaction