Table 4 Crude differences and Slope Index of Inequality (SII) for vaccination coverage among 12–23 months’ children by maternal education and household wealth quintile (2001–2016)
| Â | 2001 | 2006 | 2011 | 2016 | P-value* |
|---|---|---|---|---|---|
Rate difference (95% CI) | |||||
 No education (ref.) | |||||
  Primary | 26.2 (18.3,34.0) | 13.9(6.1,21.6) | 16.5 (8.5,24.6) | 8.0(−0.5,16.5) | 0.0184 |
  Secondary | 32.6 (25.1,40.1) | 23.4 (17.6,29.3) | 17.1 (9.0,25.2) | 12.0(3.5,20.6) | 0.0023 |
  Higher education | 33.9 (24.0,43.8) | 24.6 (18.7,30.5) | 14.3 (7.2,21.4) | 23.4 (16.3,30.6) | 0.0136 |
SII (95% CI) | −61.8 (−73.5,-50.1) | −47.9(−61.2,-34.6) | −29.8 (−43.7,-15.8) | −30.5 (−40.7,-20.2) | < 0.0001 |
Rate difference (95% CI) | |||||
 Poorest (ref.) | |||||
  Poorer | 8.2(−1.6,18.0) | 14.4 (4.2,24.6) | −0.7 (−9.0,7.6) | 0.5 (−8.8,9.9) | 0.0970 |
  Middle | 10.4 (−1.0,21.7) | 19.1 (9.0,29.3) | −0.5(− 10.5,9.5) | −5.8(− 15.1,3.6) | 0.0023 |
  Richer | 20.6(9.5,31.6) | 22.7(12.3,33.1) | 7.0 (−0.8,14.8) | 8.2 (−0.3,16.7) | 0.0355 |
  Richest | 27.4 (16.5,38.3) | 25.5 (15.3,35.6) | 11.2 (4.1,18.2) | 5.0(−5.8,15.8) | 0.0040 |
SII (95% CI) | −32.3 (−45.5,-19.1) | −32.8 (−45.7,-19.9) | −12.6 (−21.6,-3.6) | −8.4 (− 18.6,-1.7) | < 0.0001 |