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In the diagram above, which deaths would be counted in the numerator of the crude mortality rate?
Keep in mind that the survey respondent will have to accurately place in time a household death relative to the beginning of the recall period. Therefore, the recall period should be an easily remembered point in time, such as a large festival or holiday or a date on which something memorable occurred. Do not use arbitrary time periods, such as 3 months or 6 months. Most populations are not oriented enough to a western calendar to easily think of a date 3 or 6 months ago. Surveys using such recall periods risk overestimating mortality rates because people generally tend to remember traumatic events as having occurred more recently than they really did. This is called "telescoping."
The end of the recall period is usually the date of the interview.