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An Application for Pairing with Wearable Devices to Monitor Personal Health Status

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A Digital Lifestyle App for Hypertension During Pregnancy: Mixed Methods Intervention Development Study Using the

Lucy Goddard¹, Katherine Tucker¹, Nerys M Astbury¹

¹Nuffield Department of Primary Care Health Sciences, University of Oxford, Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, United Kingdom, 44 01865 ext 289215.

JMIR Formative Research

|July 24, 2025

Summary

This study developed the DAPHNY app to help pregnant women with chronic hypertension adopt healthy lifestyle behaviors. The app aims to improve pregnancy outcomes and future cardiovascular health through digital support.

Keywords:

behavior change hypertension intervention development lifestyle mobile phone person-based approach pregnancy

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Area of Science:

Obstetrics and Gynecology
Cardiovascular Health
Digital Health Interventions

Background:

Chronic hypertension affects 1-5% of pregnancies, increasing risks for adverse outcomes and long-term cardiovascular disease.
Effective management includes blood pressure monitoring and medication, with lifestyle behaviors being crucial.
Optimal methods for supporting pregnant women with chronic hypertension in adopting healthy behaviors remain under-researched.

Purpose of the Study:

To develop and optimize a digital lifestyle intervention, the DAPHNY (Diet and Activity for Pregnancy Hypertension) app.
To support women experiencing chronic hypertension during pregnancy in adopting healthy behaviors.
To improve pregnancy outcomes and future cardiovascular health.

Main Methods:

Utilized a person-based approach, literature review, and expert/patient input for intervention development.
Conducted focus groups with maternity professionals and interviews with affected women.
Employed the capability opportunity motivation-behavior model for theoretical underpinning and iterative app refinement.

Main Results:

Developed the evidence-based DAPHNY app with features like supportive messaging, goal setting, and progress reports.
User testing showed variable engagement; action-based pages (e.g., blood pressure recording) were accessed more frequently than informational ones.
Identified key app features for engagement and behavior change in hypertensive pregnancies.

Conclusions:

The DAPHNY app development offers insights into supporting healthy behaviors for pregnant women with chronic hypertension.
Future iterations should enhance engagement and integration with health systems.
Larger studies are needed to evaluate clinical effectiveness and implementation strategies.