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Table 2 Concentration indices and contributions of determinants to immunization inequality

From: Determinants of immunization inequality among urban poor children: evidence from Nairobi’s informal settlements

  Concentration index Percentage contribution
  Estimate 95% CI Estimate 95% CI
Not fully immunized −0.080 −0.083 −0.077    
Sex (male) 0.007 0.005 0.009 14% 5% 23%
Birth order (order 1) −0.028 −0.030 −0.026 18% 12% 24%
Mother's education level (primary or less) −0.080 −0.082 −0.078 78% 58% 98%
Mother's employment status (not involved in IGA) −0.057 −0.058 −0.055 22% 12% 31%
Marital status (not in union) 0.021 0.017 0.026 −6% −10% −2%
Mother age at birth of the child (<25 years) −0.035 −0.037 −0.033 13% 4% 22%
Ethnic group (ref: other)       
Kamba −0.085 −0.089 −0.082 −16% −27% −5%
Kikuyu 0.165 0.162 0.169 −34% −53% −15%
Luhya −0.041 −0.045 −0.038 11% −2% 24%
Luo 0.004 0.000 0.009 8% 4% 13%