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Table 2 Parameter estimates in the Zero-inflated negative binomial regression model for childhood mortality among female partners

From: Prevalence and determinants of childhood mortality in Nigeria

Variable IRR Std.err 95% CI P
Age (years) 1.081 0.004 1.073–1.089 <0.001***
Region
 North Central (ref) 1    
 North East 1.215 0.114 1.012–1.460 0.037***
 North West 1.383 0.123 1.161–1.647 <0.001***
 South East 1.760 0.203 1.405–2.205 <0.001***
 South South 1.341 0.145 1.086–1.657 0.007***
 South West 1.364 0.140 1.117–1.667 0.002***
Residence
 Urban (ref) 1    
 Rural 1.283 0.083 1.130–1.458 <0.001***
Education
 No Education (ref) 1    
 Primary 0.733 0.046 0.648–0.830 <0.001***
 Secondary 0.603 0.048 0.515–0.705 <0.001***
 Tertiary 0.541 0.074 0.413–0.707 <0.001***
Wealth Index
 Poorest (ref) 1    
 Poorer 0.973 0.053 0.875–1.083 0.619
 Middle 0.889 0.071 0.760–1.040 0.141
 Richer 0.625 0.054 0.527–0.742 <0.001***
 Richest 0.510 0.059 0.406–0.641 <0.001***
Age at 1st birth (years) 0.926 0.006 0.914–0.938 <0.001***
Religion
 Christianity (ref) 1    
 Islam 1.184 0.108 0.990–1.416 0.064
 Traditionalist 1.432 0.142 1.179–1.740 <0.001***
Employment
 No (ref) 1    
 Yes 1.096 0.054 0.996–1.207 0.061
  1. ***Significant at p < 0.05; IRR = Incidence-rate ratios. Vuog test of ZINB vs standardized negative binomial z = 4.97; p < 0.001. McFadden Pseudo R2 = 0.322
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