Primary Outcome
From baseline to 3 months, the within-group mean change in MSK-HQ score was 4.6 points (95% CI, 2.9-6.3 points) for the usual care group, 5.4 points (95% CI, 3.7-7.2 points) for the app group, and 4.1 points (95% CI, 2.3-5.8 points) for the e-Help group. There were no statistically significant differences in MSK-HQ scores among participants in the app group compared with other groups. The adjusted mean MSK-HQ score at 3 months was 0.62 points (95% CI, −1.66 to 2.90 points; 