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. 2013 Apr 2;8(4):e59834. doi: 10.1371/journal.pone.0059834

Table 3. Female probability of dying (35q15) and the maternal mortality ratio (and their coefficients of variation) obtained from sibling histories data reported by women only and pooled data reported by women and men for the 1–5 calendar years preceding the survey1.

Female mortality
Country Year of survey Based on reports of women Based on reports of women & men % Decrease in CI width
35q15 95% confidence interval Coefficient of variation 35q15 95% confidence interval Coefficient of variation
Cameroon 2004 0.212 0.190 0.234 5.3 0.216 0.197 0.236 4.6 12
Congo 2005 0.252 0.216 0.288 7.3 0.242 0.211 0.273 6.5 15
Indonesia 2007 0.079 0.066 0.092 8.2 0.079 0.068 0.090 7.3 11
Malawi 1992 0.221 0.180 0.263 9.5 0.213 0.176 0.251 8.9 9
Nigeria 2008 0.167 0.153 0.180 4.1 0.169 0.157 0.181 3.5 14
Tanzania 1996 0.178 0.147 0.210 9.0 0.179 0.151 0.207 8.0 11
Uganda 1995 0.279 0.242 0.315 6.7 0.282 0.252 0.313 5.5 16
Zambia 2007 0.454 0.406 0.502 5.4 0.437 0.404 0.471 4.0 29
Zimbabwe 1994 0.145 0.123 0.168 7.9 0.155 0.133 0.178 7.5 2
Zimbabwe 2005–06 0.465 0.438 0.492 3.0 0.477 0.453 0.502 2.5 8
Maternal Mortality Ratio
Country Year of survey Based on reports of women Based on reports of women & men 2 % Decrease in CI width
MMRatio 95% confidence interval Coefficient of variation MMRatio 95% confidence interval Coefficient of variation
Cameroon 2004 736 567 904 11.7 743 579 906 11.2 3
Congo 2005 944 542 1346 21.7 899 522 1275 21.4 6
Indonesia 2007 219 146 293 17.2 217 145 289 16.9 3
Malawi 1992 747 413 1081 22.8 713 398 1027 22.5 6
Nigeria 2008 709 598 819 8.0 715 608 822 7.6 3
Tanzania 1996 620 444 797 14.5 616 439 794 14.7 0
Uganda 1995 661 463 859 15.3 669 475 863 14.8 2
Zambia 2007 564 384 745 16.3 542 372 711 16.0 6
Zimbabwe 1994 435 275 594 18.7 419 266 572 18.7 4
Zimbabwe 2005–06 749 535 963 14.6 780 567 994 14.4 0
1

In order to pool data , the data obtained from women were weighted in a similar manner to data obtained from men to adjust for selection bias; however, women’s data had to be further adjusted for zero survival bias. The deaths and exposure reported by women were weighted by the inverse of the number of surviving siblings of the respondent to adjust for selection bias and further weighted by the inverse of the probability of being reported at all to adjust for zero survival bias (men provide information on women sibships with no surviving members).

2

The PMDF (obtained from women) is multiplied by female mortality (obtained from pooled data) to generate the MMRatio.