Related Experiment Video
Updated: Oct 1, 2025

Inverse Probability of Treatment Weighting Propensity Score using the Military Health System Data Repository and National Death Index
Published on: January 8, 2020
Predicting Uptake of the COVID Coach App Among US Military Veterans: Funnel Analysis Using a Probability-Based Panel.
Beth K Jaworski1, Katherine Taylor1, Kelly M Ramsey1
1National Center for Posttraumatic Stress Disorder, Dissemination & Training Division, US Department of Veterans Affairs, Menlo Park, CA, United States.
Most US veterans own smartphones, but COVID Coach app usage was low. Higher education and PTSD symptoms were linked to downloading the app, which offered stress management tools.
Area of Science:
- Mental Health
- Digital Health
- Veteran Health
Background:
- COVID-19 pandemic exacerbated mental health issues for some older veterans, linked to stressors and lack of social support.
- Mobile mental health apps offer scalable solutions for stress management, potentially bridging accessibility gaps.
- Understanding mobile app comfort and usage factors among older veterans is crucial for effective digital health interventions.
Purpose of the Study:
- Assess smartphone ownership among US veterans.
- Identify veteran characteristics associated with downloading and using the COVID Coach app.
- Characterize the usage of specific content within the COVID Coach app.
Main Methods:
- Analyzed data from the National Health and Resilience in Veterans Study (2019-2020), a nationally representative cohort of 3078 US military veterans.
- Offered the COVID Coach app to veterans completing a follow-up assessment on a mobile device (n=814).
- Collected app usage data from downloaded instances (n=34) between November 2020 and November 2021.
Main Results:
- 81.5% of US veterans own smartphones.
- Higher education, adverse childhood experiences, extraversion, and PTSD symptom severity predicted COVID Coach download.
- App uptake was low (3.3%), but 50% of users engaged for over one day, frequently using interactive stress management tools.
Conclusions:
- The COVID-19 pandemic highlighted the need for digital mental health tools.
- Digital mental health resources, like apps, may require tailoring for older veteran populations.
- Further research is needed to optimize digital mental health tool uptake and usage among older adults, especially those with trauma histories.
Related Concept Videos
Sample Proportion and Population Proportion
Comparing the Survival Analysis of Two or More Groups
Cancer Survival Analysis
Kaplan-Meier Approach
Statistical Methods for Analyzing Epidemiological Data
Parametric Survival Analysis: Weibull and Exponential Methods
Weibull Distribution
The Weibull distribution is a flexible model used in parametric survival analysis. It can handle both increasing and decreasing hazard rates, depending on its shape parameter...

