Showing 2 results for First Birth Interval
E Mohammadi Farrokhran, M Mahmoodi, K Mohammad, A Rahimi, F Majlesi, M Parsaeian,
Volume 9, Issue 1 (5-2013)
Abstract
Background & Objectives: Although several studies have been carried out for evaluation of the first birth interval, none of them has considered the presence of infertile women within the sample. Therefore, the aim of this study was to employ survival analysis to study the first birth interval and its determinant factors more accurately.
Methods: In Data from 1068 married women of reproductive age in west Azarbaijan province were considered in this investigation. Two-stage sampling design was used to collect data via a questionnaire, modified Gompertz model, a special kind of cure models, was employed in this study. For descriptive and analytical data analysis, SPSS 16 and R 2.12 were used respectively.
Results: In this study, the average interval between marriage and first birth was 3.9± 0.7 (± SD) years. Using modified Gompertz model, among all demographic factors only mother’s education had significant effect on the first birth interval so that with increasing mother’s educational level, the first birth interval had also increased.
(P =0.007). In addition, the estimation of the proportion of women who did not have any children was 0.062 that showed a positive trend with increasing mother’s educational level.
Conclusion: This study revealed that due to the presence of infertility among married women the use of Modified Cured Gompertz model is an appropriate method for evaluation of the first birth intervals and it's determinant factors.
A Bagheri, M Saadati,
Volume 15, Issue 1 (5-2019)
Abstract
Background and Objectives: One of the most important determinants of the fertility level is the birth interval. Considering the importance of this issue, the aim of this study was to analyze the first and second birth intervals using shared frailty survival model and comparing factors affecting these intervals.
Methods: Probability proportional to size stratified sampling was used to select 610 married women aged 15-49 years from different regions of Tehran during the winter and spring of 2017. Data were collected using a structured questionnaire. The shared frailty survival model was fitted to investigate the effect of calendar period, age at marriage, education level, education level of the spouse, job and migration status, household costs, and place of residence on first and second birth intervals.
Results: The median length of the first and second birth interval was 38 and 55 months, respectively. Calendar period had a significant effect on the first birth interval (p-value=0.016). Job status (p-value=0.045) and place of residence (p-value=0.025) had a significant effect on the second birth interval. The hazard rate of the first birth interval for women in the recent calendar period compared to women in the first period was equal to 0.448, and the hazard rate of the second birth interval for employed compared to unemployed, living in developed versus undeveloped regions was 0.812, and 0.724, respectively
Conclusion: Delayed childbearing among young women and longer second birth intervals in employed women may result from economic and social conditions that can be prevented by providing appropriate conditions.
