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Table 2 All-cause multivariate risk factor analysis for infant mortality in Agincourt sub-district, 1992-2007, using Bayesian geostatistical and temporal models

From: Young and vulnerable: Spatial-temporal trends and risk factors for infant mortality in rural South Africa (Agincourt), 1992-2007

  Spatial model   Temporal model   Spatial-temporal model  
Covariate IRR [95%CI] signif α IRR [95%CI] signif α IRR [95%CI] Signif α
Later year of birth 1.09 [1.06,1.13] * 1.20 [1.03,1.42] * 1.25 [1.07,1.53] *
Cumulative household deaths 12.45 [9.41,16.31] * 12.52 [9.47,16.26] * 12.59 [9.53,16.49] *
Male gender 1.09 [0.84,1.4]   1.09 [0.83,1.4]   1.09 [0.84,1.4]  
Mother died in infant's first year 49.82 [7.85,204.7] * 49.62 [8,189.9] * 51.11 [8.49,200.8] *
Pregnancy parity 0.91 [0.80,1.05]   0.94 [0.82,1.08]   0.94 [0.82,1.06]  
Previous child died 2.33 [0.99,4.86] # 2.07 [0.93,4.07] # 2.02 [0.89,3.96] #
Previous birth stillborn 8.13 [2.08,22.99] * 6.24 [1.55,16.99] * 6.29 [1.56,17.85] *
Constant (b0) -3.24 [-4.60,-1.82]   -0.10 [-2.09,1.65]   -0.63 [-3.08,0.97]  
σ2 (spatial) 9.15 [4.29,18.33]   ---   0.09 [0.03,0.22]  
σ2 (temporal) ---   0.42 [0.14,1.05]   0.44 [0.14,1.11]  
DIC β 8680.07   8617.10   8617.34  
  1. α: * significant at the 5% level; # significant at the 10% level
  2. β: Deviance Information Criterion