| Before health reform | After health reform | P | ||||
---|---|---|---|---|---|---|---|
 | Concentration index | 95% CI | Concentration index | 95% CI |  | ||
 |  | Lower | Upper |  | Lower | Upper |  |
Prenatal visits | |||||||
 Urban | 0.053 | 0.011 | 0.093 | 0.0004 | −0.024 | 0.025 | 0.030 |
 Rural | 0.017 | −0.012 | 0.471 | 0.029 | 0.013 | 0.045 | 0.471 |
Postnatal visits | |||||||
 Urban | 0.083 | −0.019 | 0.180 | −0.075 | −0.148 | −0.020 | 0.006 |
 Rural | 0.041 | −0.017 | 0.098 | −0.017 | −0.047 | 0.012 | 0.080 |