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Factors associated with time to first birth interval among ever married Bangladeshi women: A comparative analysis on Cox-PH model and parametric models

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  • Sarmistha Paul Setu
  • Rasel Kabir
  • Md Akhtarul Islam
  • Sharlene Alauddin
  • Mst Tanmin Nahar

Abstract

The fertility rate of a married woman can be measured by the length of the first birth interval (FBI). This length is influenced by some significant factors. Better knowledge about the factors affecting the birth interval can help in controlling population growth and fertility progress. The main focus of this study was to compare the performance of Cox-Proportional Hazard (Cox-PH) and the parametric Accelerated Failure Time (AFT) model in assessing the impact of significant factors affecting the time to FBI of ever-married Bangladeshi women. Information of 14941 women having at least one birth was included in this study from the most recent nationally representative data 2017–18 Bangladesh Demographic and Health Survey (BDHS). We used the Cox-PH model and AFT model under various parametric forms of survival time distributions (Weibull, Exponential, and Log-normal distribution) to measure the effect of factors influencing FBI. And then, a respective Akaike information criterion (AIC) was calculated for selecting the best-fitted model. According to the AIC and BIC values, the log-normal model fitted better than other AFT models. Based on the log-normal model, women’s age and age at first marriage, maternal and paternal education, contraceptive use status, used anything to avoid pregnancy, sex of household head, and spousal age difference had a significant association with FBI of ever married Bangladeshi women. The parametric AFT model (log-normal distribution) was a better fitted model in evaluating the covariates associated with FBI of ever-married Bangladeshi Women. Higher education, the right age at marriage, and proper knowledge about family planning (i.e., contraception use) should be ensured for every married person to control the gap of the first birth.

Suggested Citation

  • Sarmistha Paul Setu & Rasel Kabir & Md Akhtarul Islam & Sharlene Alauddin & Mst Tanmin Nahar, 2024. "Factors associated with time to first birth interval among ever married Bangladeshi women: A comparative analysis on Cox-PH model and parametric models," PLOS Global Public Health, Public Library of Science, vol. 4(12), pages 1-17, December.
    • Handle: RePEc:plo:pgph00:0004062
    DOI: 10.1371/journal.pgph.0004062
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    References listed on IDEAS

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    1. Ray Miller & Mahesh Karra, 2020. "Birth Spacing and Child Health Trajectories," Population and Development Review, The Population Council, Inc., vol. 46(2), pages 347-371, June.
    2. MD MUKHLESUR RAHMAN & Mohitul Ameen Ahmed Mustafi & Mir Mohammad Azad, 2013. "Analysis of the Determinant’s of Marriage to First Birth Interval in Bangladesh," International Journal of Management and Sustainability, Conscientia Beam, vol. 3(12), pages 208-219.
    3. Md Mukhlesur Rahman & Mohitul Ameen Ahmed Mustafi & Mir Mohammad Azad, 2013. "Analysis of the Determinants of Marriage to First Birth Interval in Bangladesh," International Journal of Management and Sustainability, Conscientia Beam, vol. 2(12), pages 208-219.
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