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. 2011 Feb 1;89(4):258–266. doi: 10.2471/BLT.10.083329

Fig. 2.

Change between successive Demographic and Health Surveys (DHS) in the concentration indexa of met contraceptive needs for spacing and for limiting births, by country

a A concentration index of 0 indicates that there is no wealth-related inequality in met contraceptive need. A positive change in the index represents a decrease in wealth-related inequality; a negative change in the index represents an increase in wealth-related inequality.

Fig. 2