Limitations
nonadherence, hypertension
HYPERTENSION, RECRUITMENT
This study has limitations. First, patient recruitment was conducted using convenience sampling from a single site, which may be biased by demographic characteristics and might limit the generalizability of the results. However, this study lays the groundwork for future research on the efficacy of the mHealth app in a larger sample of patients with hypertension at multiple sites. Second, the study had a relatively high attrition rate. However, the comparison of baseline data of the remaining participants of the 2 groups found no significant difference, and the results are still representative. Follow-up studies are needed to further identify reasons for participant attrition to prevent future dropouts and the incentives that can help keep participants engaged and reduce the likelihood of dropping out. Third, all participants in the intervention group were mobile phone owners and likely to have a higher socioeconomic status. Previous studies have suggested that this population is at a lower risk of nonadherence to medication management [