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Computer adaptive testing strategies for the Edinburgh Postnatal Depression Scale (EPDS).

Emily F Wong1, Eynav E Accortt2, Seung W Choi3

  • 1Department of Computational Biomedicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA. Emily.Wong@cshs.org.

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Summary

Computer Adaptive Testing (CAT) for Perinatal Mood and Anxiety Disorders (PMADs) using the Edinburgh Postnatal Depression Scale (EPDS) maintains diagnostic accuracy and shows no racial bias. This efficient screening can improve equitable care for diverse populations.

Keywords:
Algorithmic fairnessComputer adaptive testingEdinburgh postnatal depression scalePerinatal mood and anxiety disordersPostpartum depression

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Area of Science:

  • Psychiatry
  • Psychometrics
  • Public Health

Background:

  • Perinatal Mood and Anxiety Disorders (PMADs) affect parent, child, and family well-being, with disparities in diagnosis and treatment among minority groups.
  • Existing screening methods for PMADs can be lengthy, potentially hindering widespread adoption and equitable access.
  • Computer Adaptive Testing (CAT) offers a method to improve screening efficiency by reducing test length.

Purpose of the Study:

  • To evaluate if CAT-based short-form versions of the Edinburgh Postnatal Depression Scale (EPDS) maintain diagnostic accuracy.
  • To determine if these CAT methods exacerbate existing racial disparities in PMAD screening outcomes.

Main Methods:

  • Real data simulation was used to assess three CAT-based short-form EPDS versions derived from item response theory models.
  • Diagnostic precision of the short forms was evaluated.
  • Potential racial disparities in false negative rates were examined compared to the full-length EPDS.

Main Results:

  • CAT-based EPDS short forms showed high correlation (r=0.96-0.97) with the full-length EPDS, exceeding previous CAT-MDD correlations (r=0.82).
  • False negative rates for CAT-implied diagnoses did not significantly differ across racial groups, indicating no racial bias.
  • CAT application to EPDS maintains diagnostic precision.

Conclusions:

  • CAT-based EPDS versions are a promising tool for efficient PMAD screening.
  • These tools maintain diagnostic precision and do not worsen racial disparities.
  • Reduced evaluation time can facilitate wider, more equitable screening for earlier PMAD diagnosis and treatment.