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Afghanistan Mortality Survey 2010 - Measure DHS

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ased on the sibling history (270). If that same relative difference were to be applied to the pregnancyrelatedmortality ratio of 327 from the sibling history for the seven years before the survey, the resultingestimate of the pregnancy-related mortality ratio for the seven-year period would increase to 453. Theexpected age pattern of the risk of pregnancy-related mortality is seen in the household data, with aparticularly high risk for very young women (age 15-19) and for older women (age 35-49).There are several ways to assess the quality of the AMS data used for the estimates in thischapter. Response rates for the AMS <strong>2010</strong> are high at both the household and woman’s level. Siblingsthat are reported have almost complete information on survival status, the age of living siblings and theyears since death of deceased siblings. The distribution of the year of birth of siblings is similar to thedistribution of the respondents’ own years of birth, which would be expected if the data are of reasonablequality. However, there appears to be some omission in the reporting of siblings, particularly of olderwomen. In addition, the sex ratio at birth of siblings that women reported is outside the high end of thenormal biological range, indicating that some sisters were likely to be underreported. This suggests thatthe pregnancy-related mortality ratios are likely to be underestimated to some extent.As in any sample survey, the mortality rates may vary somewhat due to heterogeneity in thepopulation and clustering in the sample design. In the AMS <strong>2010</strong>, the confidence interval around thepregnancy-related mortality ratio of 327 from the sibling history is 260-394. The confidence intervals ofthe estimates show the likely range within which the true value of the pregnancy-related mortality ratio islikely to fall. Based on the sampling errors, the pregnancy-related mortality ratio for the seven yearspreceding the AMS <strong>2010</strong> could be as high as 394. If an additional 14 percent is added on because of thehigher estimate using the Gakidou-King method, the pregnancy-related mortality ratio could be as high as449. If the pregnancy-related mortality ratio is taken from the verbal autopsy for the three years before thesurvey (374), the highest ratio would still be well below the 500 level even after the confidence intervalaround the estimate is considered.134 | Maternal <strong>Mortality</strong>

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