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. 2013 Jun 12;3(6):e002507. doi: 10.1136/bmjopen-2012-002507

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Trends in the percentage of skilled birth attendance by (A) woman's education, (B) partner's education, (C) wealth index, 1993–2008. Note: Concentration index based on wealth index in 1993 (0.26, 95% CI 0.24 to 0.29); 1998 (0.29, 95% CI 0.26 to 0.31); 2003 (0.22, 95% CI 0.20 to 0.24); and 2008 (0.24, 95% CI 0.21 to 0.27).