Table 1. Inequality decomposition of the Erreygers’s concentration index for childhood morbidity, 1993–2014.
| Variables | Coefficients & p-value | Elasticities | Erreygers concentration index (CI) | Contributions to Erreygers CI (%) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1993–94 (1996–97)1 |
2014 | 1993–94 (1996–97)1 |
2014 | 1993–94 (1996–97)1 |
2014 | 1993–94 (1996–97)1 |
2014 | Change | |||
| For diarrhea | |||||||||||
| Child’s age (months) | 0.00 | 0.00 | 0.00 | 0.00 | 1.26 | 1.56 | -0.26 | -0.16 | 10.01 | 8.21 | -1.80 |
| Child’s age squared | 0.07 | 0.02 | 0.05 | 0.02 | -0.78 | -1.86 | -0.09 | -0.08 | 7.21 | -6.10 | -13.31 |
| Child sex (= male) | -0.04 | 0.33 | 0.11 | 0.09 | -0.03 | 0.06 | -0.02 | -0.11 | -4.65 | -2.07 | 2.58 |
| Mother age (years) | -0.03 | 0.00 | -0.01 | 0.01 | -0.73 | -0.20 | -0.14 | 0.12 | -5.51 | -10.42 | -4.91 |
| Mother schooling (years) | -0.02 | 0.67 | -0.05 | 0.06 | -0.02 | 0.08 | 0.19 | 0.10 | 12.10 | 11.15 | -0.95 |
| Birth order | 0.08 | 0.00 | 0.04 | 0.05 | 0.26 | 0.90 | -0.12 | -0.17 | 10.37 | 14.03 | 3.66 |
| Preceding birth interval (months) | 0.02 | 0.42 | -0.01 | 0.03 | 0.08 | -0.03 | 0.22 | 0.08 | -2.20 | -7.29 | -5.09 |
| Antenatal care visits | -0.08 | 0.22 | -0.03 | 0.05 | -0.11 | -0.05 | 0.13 | 0.15 | 15.01 | 12.31 | -2.70 |
| Households size | 0.02 | 0.11 | 0.02 | 0.02 | -0.12 | 0.11 | 0.09 | 0.09 | 2.71 | 3.17 | 0.46 |
| Breastfeeding practice (= yes) | -0.03 | 0.01 | -0.09 | 0.05 | -0.05 | 0.13 | 0.06 | 0.08 | 6.92 | 6.22 | -0.70 |
| Access to health facility (= yes) | 0.04 | 0.09 | 0.03 | 0.02 | -0.07 | 0.06 | -0.08 | -0.05 | 3.56 | 5.26 | 1.70 |
| Mass media communication (= yes) | -0.05 | 0.00 | -0.09 | 0.00 | 0.08 | 0.09 | 0.05 | 0.03 | 2.06 | 2.19 | 0.13 |
| Chronic undernutrition status (= yes) | -0.05 | 0.01 | -0.16 | 0.01 | 0.14 | 0.13 | -0.16 | -0.09 | 13.96 | 13.10 | -0.86 |
| Vaccination coverage (= yes) | -0.13 | 0.02 | -0.28 | 0.02 | -0.03 | 0.01 | -0.05 | -0.04 | -8.20 | -9.13 | -0.93 |
| Residence (= rural) | 0.06 | 0.05 | 0.14 | 0.09 | 0.01 | 0.02 | 0.06 | 0.04 | -6.19 | -5.01 | 1.18 |
| Wealth index | -0.03 | 0.04 | -0.04 | 0.04 | 0.07 | -0.13 | 0.44 | 0.51 | 33.17 | 39.17 | 6.00 |
| Total | 90.33 | 74.79 | -15.54 | ||||||||
| For acute respiratory infection (ARI) | |||||||||||
| Child’s age (months) | 0.01 | 0.00 | - 0.03 | 0.04 | -0.24 | -0.96 | -0.07 | -0.29 | 22.11 | 17.21 | -4.90 |
| Child’s age squared | 0.00 | 0.05 | 0.00 | 0.08 | 0.19 | 0.90 | -0.08 | -0.11 | -8.09 | -4.12 | 3.97 |
| Child sex (= male) | 0.21 | 0.04 | 0.19 | 0.08 | 0.11 | 0.10 | -0.01 | 0.18 | -6.89 | -20.19 | -13.30 |
| Mother age (years) | 0.00 | 0.01 | - 0.00 | 0.01 | 0.01 | -0.03 | -0.27 | -0.12 | -6.86 | -10.52 | -3.66 |
| Mother schooling (years) | -0.08 | 0.09 | - 0.07 | 0.06 | -0.05 | -0.11 | 0.25 | 0.13 | 15.21 | 19.84 | 4.63 |
| Birth order | -0.01 | 0.01 | 0.01 | 0.04 | -0.03 | 0.03 | -0.28 | -0.14 | 8.79 | 12.31 | 3.52 |
| Preceding birth interval (months) | 0.01 | 0.02 | - 0.02 | 0.03 | 0.03 | -0.09 | 0.14 | 0.10 | -2.29 | -8.69 | -6.40 |
| Antenatal care visits | 0.12 | 0.09 | 0.00 | 0.05 | 0.16 | -0.01 | 0.29 | 0.19 | 19.01 | 18.31 | -0.70 |
| Households size | -0.02 | 0.01 | - 0.04 | 0.02 | -0.16 | -0.23 | 0.20 | 0.15 | 14.66 | 16.50 | 1.84 |
| Breastfeeding practice (= yes) | -0.02 | 0.04 | -0.07 | 0.03 | -0.04 | 0.11 | 0.07 | 0.12 | 6.27 | 10.11 | 3.84 |
| Access to health facility (= yes) | 0.05 | 0.06 | 0.06 | 0.01 | -0.06 | 0.03 | -0.06 | -0.07 | 4.52 | 6.21 | 1.69 |
| Mass media communication (= yes) | -0.03 | 0.01 | -0.08 | 0.02 | 0.05 | 0.06 | 0.04 | 0.06 | 6.10 | 5.10 | -1.00 |
| Chronic undernutrition status (= yes) | -0.08 | 0.05 | -0.13 | 0.03 | 0.04 | 0.04 | -0.07 | -0.11 | 5.09 | 5.11 | 0.02 |
| Vaccination coverage (= yes) | 0.01 | 0.08 | - 0.17 | 0.16 | 0.00 | -0.01 | -0.06 | -0.04 | -5.12 | -7.03 | -1.91 |
| Residence (= rural) | 0.09 | 0.06 | 0.00 | 0.10 | 0.01 | 0.00 | 0.23 | 0.25 | -8.10 | -15.09 | -6.99 |
| Wealth index | -0.01 | 0.06 | - 0.06 | 0.00 | -0.04 | -0.18 | 0.38 | 0.35 | 29.71 | 35.19 | 5.48 |
| Total | 94.12 | 80.25 | -13.87 | ||||||||
| For fever | |||||||||||
| Child’s age (months) | -0.01 | 0.00 | 0.01 | 0.00 | -0.15 | 0.28 | -0.17 | -0.19 | 20.42 | 10.01 | -10.41 |
| Child’s age squared | 0.00 | 0.00 | 0.00 | 0.01 | -0.04 | -0.44 | -0.08 | -0.04 | -6.19 | -3.15 | 3.04 |
| Child sex (= male) | -0.01 | 0.04 | 0.01 | 0.03 | -0.01 | 0.01 | 0.01 | 0.04 | -6.67 | -9.72 | -3.05 |
| Mother age (years) | -0.02 | 0.01 | -0.01 | 0.08 | -0.40 | -0.15 | -0.17 | 0.12 | -4.61 | -11.51 | -6.90 |
| Mother schooling (years) | 0.04 | 0.03 | -0.01 | 0.01 | 0.03 | -0.01 | 0.12 | 0.09 | 12.98 | 11.35 | -1.63 |
| Birth order | 0.04 | 0.02 | 0.04 | 0.03 | 0.12 | 0.10 | -0.20 | -0.35 | 9.73 | 7.31 | -2.42 |
| Preceding birth interval (months) | 0.04 | 0.02 | -0.03 | 0.02 | 0.13 | -0.12 | 0.08 | 0.13 | -5.15 | -6.29 | -1.14 |
| Antenatal care visits | -0.02 | 0.05 | 0.03 | 0.03 | -0.02 | 0.06 | 0.14 | 0.11 | 11.21 | 12.09 | 0.88 |
| Households size | -0.02 | 0.01 | -0.01 | 0.01 | -0.11 | -0.08 | 0.08 | 0.09 | 3.22 | 9.17 | 5.95 |
| Breastfeeding practice (= yes) | -0.06 | 0.03 | -0.06 | 0.03 | -0.07 | 0.11 | 0.09 | 0.11 | 10.19 | 15.02 | 4.83 |
| Access to health facility (= yes) | 0.06 | 0.06 | 0.05 | 0.04 | -0.09 | 0.09 | -0.05 | -0.06 | 4.15 | 4.16 | 0.01 |
| Mass media communication (= yes) | -0.03 | 0.02 | -0.07 | 0.01 | 0.10 | 0.08 | 0.06 | 0.02 | 3.60 | 5.11 | 1.51 |
| Chronic undernutrition status (= yes) | -0.04 | 0.04 | -0.10 | 0.04 | 0.06 | 0.11 | -0.07 | -0.08 | 9.09 | 14.12 | 5.03 |
| Vaccination coverage (= yes) | -0.15 | 0.06 | -0.39 | 0.00 | -0.02 | -0.02 | -0.11 | -0.04 | -8.11 | -7.13 | 0.98 |
| Residence (= rural) | 0.05 | 0.07 | 0.05 | 0.04 | 0.01 | 0.02 | 0.07 | 0.08 | -4.19 | -6.19 | -2.00 |
| Wealth index | -0.04 | 0.02 | -0.02 | 0.04 | -0.12 | -0.07 | 0.23 | 0.31 | 40.78 | 32.17 | -8.61 |
| Total | 89.45 | 83.52 | -5.93 | ||||||||
Note: 1996–97 for fever due to paucity of data. Coefficients and p-values were derived using probit regression model.