Survival Analysis of Time to First Birth After Marriage
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Date
2015-07
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Addis Abeba university
Abstract
The first birth describes a woman’s transition into motherhood. It has a significant role in the future life of each individual woman and a direct relationship with fertility. The study aimed to model the determinant of the waiting time to first birth after marriage of Ethiopian women. The data source for the analysis was the 2011 EDHS data collected during September 2010 through January 2011. Survival analysis is a statistical method for data analysis where the outcome variable of interest is the time to the occurrence of an event. Non-parametric survival analysis techniques such as the life table, log-rank test and semi-parametric Cox proportional hazard regression analysis were used to investigate the determinants of waiting time to first birth after marriage. The Cox Proportional Hazard Model is a multiple regression method used to evaluate the effect of multiple covariates on the survival. Out of the total (7594) about 89% of women were give birth and the rest of 11% were not gave birth in marriage at all. The median of waiting time of a woman to first birth after marriage was 2 years. The minimum and maximum waiting time of first birth in the data was 1 years and 35 years respectively. The skewness of waiting time of a woman to first birth after marriage is 3.480. This shows that a data is skewed to the right distribution. The 25th and 75th percentile of waiting time of a woman to first birth after marriage was 2 and 4 years respectively. The result of Cox proportional hazard model showed that the factors that determine the waiting time to first birth after marriage which are Age at first marriage, Women educational level, Region, Place of residence, Educational level of husband and Employment status of the respondents are statistically significant.
Key words: First birth interval, Marriage, Survival
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Keywords
First Birth Interval, Marriage, Survival