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Table 2 Adjusted estimated effect of ownership of mosquito net on malaria mortality in three models for Rufiji 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

0.004 (0.00, 0.180)

0.0002 (0.0, 0.170)

0.0002 (0.0, 0.175)

 Mosquito nets

0.959 (0.944, 0.975)

0.948 (0.917, 0.977)

0.950 (0.919, 0.977)

 Annual rainfall

1.047 (1.024, 1.071)

1.066 (1.031, 1.107)

1.066 (1.031, 1.106)

 Average temperature

0.998 (0.986, 1.009)

1.007 (0.986, 1.031)

1.006 (0.986, 1.029)

 Mean NDVI

1.045 (0.985,1.109)

1.058 (0.974, 1.146)

1.059 (0.976, 1.147)

 Spatial random effect

 

21.89 (6.82, 57.92)

22.16 (6.89, 59.28)

 Temporal random effect

 

80.26 (11.49, 265.0)

120.96 (13.44, 475.23)

 Spatial–temporal random effect

  

24,453.3 (1988.4, 97, 438.8)

 DIC

1933.614

1880.076

1902.217

Under five

 Intercept

2.294 (0.01, 72.539)

0.151 (0.0, 18.81)

0.160 (0.0, 14.161)

 Mosquito nets

0.951 (0.929, 0.973)

0.946 (0.909, 0.982)

0.946 (0.910, 0.982)

 Annual rainfall

1.037 (1.003, 1.072)

1.056 (1.008, 1.110)

1.054 (1.007, 1.107)

 Average temperature

0.982 (0.965, 0.998)

0.989 (0.962, 1.100)

0.989 (0.963, 1.018)

 Mean NDVI

1.010 (0.926, 1.102)

1.030 (0.934, 1.137)

1.030 (0.934, 1.137)

 Spatial random effect

 

28,708.6 (3481.2, 89,382.7)

28,499.5 (3476.5, 88, 897.6)

 Temporal random effect

 

44.87 (7.71, 139.67)

54.73 (8.59, 180.77)

 Spatial–temporal random effect

  

18,370.02 (18,242.8, 66, 475.6)

 DIC

1504.408

1483.748

1508.173

  1. The effect of rain 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. The effect of NDVI was estimated for every 0.1 increase in mean NDVI
  2. 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