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KMID : 0353019720090010065
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Korean Journal of Public Health
1972 Volume.9 No. 1 p.65 ~ p.69
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A Statistical Study on Birth Intervals by Age of Mother & Delivery Order
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Abstract
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This study was made on the basis of the fertility survey result which was conducted during the period from March to May, 1965 in a middle town area of Echon Eup, Kyunggi Province. Of a total sample size of 2,024 eligible women(age 20-44) selected for the survey, only the results of 1,012 women who had neither practised family planning nor experienced abstinence were utilized for this study.
The following is a summary of the findings on the Birth Intervals by Age of Mether & Delivery Order;
1. As for the Birth Interval by delivery order. it showed a decreasing trend after the 8th delivery.
2. The birth interval showed an upward trend as the age of eligible women increased.
3. The manner of changes in the mean and variance of birth intervals was found to vary depending on whether the age of mother were measured at the beginning of interval or at the end of intervals. That is, no particular trend could be observed in the former case, while the latter showed clearly an increasing trend by the order of delivery and a decreasing trend by the age of mother. This implies that when birth intervals are to be classified by the age of mother, it should be made clear whether the age were taken at the beginning or the end of the intervals.
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