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Cost-effectiveness of screening tools for identifying depression in early pregnancy: a decision tree model

Research output: Contribution to journalArticlepeer-review

Margaret Heslin, Huajie Jin, Kylee Trevillion, Xiaoxiao Ling, Selina Nath, Barbara Barrett, Jill Demilew, Elizabeth Ryan, Sheila O'Connor, Polly Sands , Jeannette Milgrom, Debra Bick, Nicky Stanley, Myra S. Hunter, Louise Howard, Sarah Byford

Original languageEnglish
JournalBMC Health Services Research
Early online date13 Jun 2022
DOIs
Accepted/In press4 May 2022
E-pub ahead of print13 Jun 2022

Documents

King's Authors

Abstract

Background
Although the effectiveness of screening tools for detecting depression in pregnancy has been investigated, there is limited evidence on the cost-effectiveness. This is vital in providing full information to decision makers. This study aimed to explore the cost-effectiveness of different screening tools to identify depression in early pregnancy compared to no screening.

Methods
A decision tree was developed to model the identification and treatment pathways of depression from the first antenatal appointment to 3-months postpartum using the Whooley questions, the Edinburgh Postnatal Depression Scale (EPDS) and the Whooley questions followed by the EPDS, compared to no screening. The economic evaluation took an NHS and Personal Social Services perspective. Model parameters were taken from a combination of sources including a cross-sectional survey investigating the diagnostic accuracy of screening tools, and other published literature. Cost-effectiveness was assessed in terms of the incremental cost per quality adjusted life years (QALYs). Cost-effectiveness planes and cost-effectiveness acceptability curves were produced using a net-benefit approach based on Monte Carlo simulations of cost-outcome data.

Results
In a 4-way comparison, the Whooley, EPDS and Whooley followed by the EPDS each had a similar probability of being cost-effective at around 30% for willingness to pay values from £20,000-30,000 per QALY compared to around 20% for the no screen option.

Conclusions
All three screening approaches tested had a higher probability of being cost-effective than the no-screen option . In the absence of a clear cost-effectiveness advantage for any one of the three screening options, the choice between the screening approaches could be made on other grounds, such as clinical burden of the screening options. Limitations include data availability and short time horizon, thus further research is needed.

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