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Table 4 Ratio of richest to poorest quintile and concentration indices for adolescent first births disaggregated by age: based on DHS data from 22 countries for women aged 20–24

From: Trends in adolescent first births in sub-Saharan Africa: a tale of increasing inequity?

Years at time of survey
  < 16 16/17 18/19 < 20
Ratio richest: poorest quintile
W/M Africa
  Baseline survey 0.42 0.60 0.70 0.58
  Final survey 0.31 0.42 0.57 0.44
E/S Africa
  Baseline survey 0.36 0.66 0.77 0.64
  Final survey 0.28 0.39 0.54 0.44
Concentration indices
W/M Africa
  Baseline survey −0.18 −0.11 −0.09 −0.12
  Final survey −0.27 −0.13 −0.12 −0.16
E/S Africa
  Baseline survey −0.19 −0.10 −0.08 −0.84
  Final survey −0.24 −0.17 −0.14 −0.15