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The pregnancy-related anxiety scale: A validity examination using Rasch analysis
Robyn J Brunton1, Rachel Dryer1, Chris Krägeloh2
1Charles Sturt University, School of Psychology, Bathurst NSW 2795, Australia.
Journal of Affective Disorders
|May 7, 2018
Summary
Pregnancy-related anxiety screening is improved with the validated Pregnancy-related Anxiety Scale (PrAS). Rasch analysis confirmed its psychometric soundness for early intervention and targeted support.
Area of Science:
- Psychiatry
- Psychometrics
- Maternal-Fetal Medicine
Background:
- Pregnancy-related anxiety is common, linked to adverse maternal and infant outcomes.
- Existing anxiety scales lack sufficient psychometric properties for effective screening.
- A need exists for a reliable measure to facilitate early intervention.
Purpose of the Study:
- To evaluate the psychometric properties of the Pregnancy-related Anxiety Scale (PrAS) using Rasch analysis.
- To refine the PrAS for improved clinical utility in screening for pregnancy anxiety.
- To confirm the scale's validity and reliability for assessing maternal anxiety during pregnancy.
Main Methods:
- Rasch analysis was applied to data from 497 pregnant women who completed the PrAS.
- Confirmatory Factor Analysis (CFA) was used to examine the scale's structure.
- The scale underwent minor modifications based on Rasch analysis findings.
Main Results:
- The 33-item, 8-factor Rasch model showed good fit, unidimensionality, and excellent targeting.
- Internal consistency was high, confirmed by Cronbach's alpha.
- CFA validated the final scale structure.
Conclusions:
- Rasch analysis supports the internal construct validity of the PrAS.
- The PrAS is a comprehensive, psychometrically sound scale for screening pregnancy-related anxiety.
- Subscales offer targeted insights for personalized interventions.
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