Table 3 Decomposition of the socioeconomic inequality in adequate (≥ 3) uptake of IPTp-SP among pregnant women in Nigeria, 2018
Variables | Marginal effect | Elasticities | Ck | Contribution to Cn | Percentage contribution (%) | |
|---|---|---|---|---|---|---|
Absolute | Summed | |||||
Age group | ||||||
15–24 (ref) | ||||||
25–34 | 0.007*** | 0.009 | 0.017 | 0.000 | ||
35–49 | 0.010*** | 0.012 | 0.007 | 0.000 | ||
Marital status | ||||||
Married | 0.012*** | 0.031 | − 0.059 | − 0.001 | − 0.001 | − 1.90 |
Others (ref) | ||||||
Level of education (women) | ||||||
No formal education (ref) | ||||||
Primary | − 0.017*** | − 0.009 | − 0.096 | 0.001 | ||
Secondary | − 0.015*** | − 0.023 | 0.197 | − 0.003 | ||
Tertiary | − 0.021*** | − 0.009 | 0.459 | − 0.003 | ||
Level of education (husband) | ||||||
No formal education (ref) | ||||||
Primary | 0.003*** | 0.002 | − 0.097 | 0.000 | ||
Secondary | 0.052** | 0.067 | 0.173 | 0.008 | ||
Tertiary | 0.054** | 0.033 | 0.395 | 0.010 | 0.018 | 20.01 |
Wealth index of households | ||||||
Poorest (ref) | ||||||
Poorer | − 0.075* | − 0.056 | − 0.437 | 0.018 | ||
Middle | − 0.091* | − 0.068 | − 0.437 | 0.022 | ||
Richer | − 0.078* | − 0.064 | 0.563 | − 0.026 | ||
Richest | − 0.083* | − 0.070 | 0.563 | − 0.029 | − 0.016 | − 25.90 |
Employment status | ||||||
Unemployed (ref) | ||||||
Employed | − 0.015*** | − 0.038 | 0.018 | − 0.001 | − 0.001 | − 0.84 |
Religion | ||||||
Christian (ref) | ||||||
Muslim | 0.035*** | 0.072 | − 0.129 | − 0.007 | ||
Others | − 0.139 | − 0.003 | − 0.147 | 0.000 | − 0.006 | − 10.57 |
Place of residence | ||||||
Urban | − 0.024*** | − 0.042 | 0.282 | − 0.009 | − 0.009 | − 14.28 |
Rural (ref) | ||||||
Geopolitical zone | ||||||
North-Central (ref) | ||||||
North-East | − 0.073* | − 0.045 | − 0.235 | 0.008 | ||
North-West | − 0.091* | − 0.102 | − 0.206 | 0.016 | ||
South-East | 0.249 | 0.113 | 0.180 | 0.015 | ||
South-South | 0.070* | 0.031 | 0.228 | 0.005 | ||
South-West | − 0.014*** | − 0.009 | 0.351 | − 0.002 | 0.041 | 67.38 |
Distance to health facility (big problem) | − 0.029** | − 0.029 | − 0.175 | 0.004 | 0.004 | 6.17 |
Permission for self-medical help (big problem) | 0.005*** | 0.002 | − 0.106 | 0.000 | 0.000 | − 0.31 |
Number of ANC visits (≥ 4 times) | 0.068* | 0.151 | 0.148 | 0.016 | 0.016 | 26.92 |
Sum | 0.041 | 66.67 | ||||
Residual | 0.020 | 33.33 | ||||
Total Cn | 0.061 | 100.00 | ||||