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Prenatal and Childbirth Risk Factors of Postpartum Pain and Depression: A Machine Learning Approach

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Abstract

Objectives

About 74.91% of U.S. mothers experience postpartum pain at 6 to 10 weeks postpartum, and one in seven U.S. mothers suffer from postpartum depression. We used machine learning to explore physical, psychological, and social factors during pregnancy and childbirth and identify the most important predictors of postpartum pain and depression.

Methods

Data were from the Listening To Mothers III survey (2012), a national representative sample of postpartum mothers. We randomly split the dataset into a training set (N = 1467) and a test set (N = 723). The final models included 34 risk factors identified from previous literature. Postpartum pain was measured as “to what extent the pain interferes with mothers’ daily life”. PHQ2 scores measured depression. We used the random forest model, an aggregate of many regression trees, to accommodate potential nonlinear/interaction effects.

Results

In the test data set, our models explained 15.8% of the variance in pain and 27.1% of the variance in depression. The model’s strongest predictors for postpartum pain were Cesarean delivery, holding back while communicating with providers, non-use of pain relief medications, and perceived discrimination. For depression scores, the model’s strongest predictors included needing help for depression during pregnancy, perceived discrimination, holding back, gestational diabetes, and pain.

Conclusions for Practice

Mental and physical health are intertwined and should be considered integratively in the perinatal period. Besides, practitioners should also be aware of the importance of patient-provider-relationship, which both independently and interact with other risk factors to predict postpartum health.

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Data Availability

The data used in this study are publicly available at https://dataverse.unc.edu/dataset.xhtml?persistentId=doi:10.15139/S3/11925&studyListingIndex=0_18875299f82a36fd0aae67b748c3.

Code Availability

Code are available by contacting author YL at yu.liu.uh.phls.2021@gmail.com.

Notes

  1. The permutation importance measures capture the importance of each variable. To compute it, we first randomly shuffled values in one variable and made predictions with rest variables. By comparing the predictions with the actual value, we calculated the permutation importance measures to represent how much model accuracy were lost due to the shuffling of that variable.

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Funding

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Authors and Affiliations

Authors

Contributions

Conceptualization and data curation: WX. Methodology and data analysis: WX. Writing, review and editing: WX and MS.

Corresponding author

Correspondence to Wen Xu.

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Conflict of interest

The authors declare that they have no conflict of interest.

Ethical Approval

The study was exempted by the University of Houston Institutional Review Board.

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Supplementary file1 (DOCX 38 KB)

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Xu, W., Sampson, M. Prenatal and Childbirth Risk Factors of Postpartum Pain and Depression: A Machine Learning Approach. Matern Child Health J 27, 286–296 (2023). https://doi.org/10.1007/s10995-022-03532-0

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  • DOI: https://doi.org/10.1007/s10995-022-03532-0

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