Limitations
RECRUITMENT
This study has several limitations. The originally intended sample size of 360 participants was not achieved due to recruitment limitations during the COVID-19 pandemic, and we revised the sample size to 200 in consultation with the Western Sydney Local Health District Human Research Ethics Committee. This reduced the accuracy of findings, although the primary outcome was still achieved. The intervention was also consistent among all patients, with little personalization or variation. This kept costs low and facilitated scaled delivery, although it may have limited engagement with protracted delivery. The lack of discrimination among patients for medication adherence measures was disappointing and likely due to limitations of the 3-item scale selected to reduce survey burden. Furthermore, it is possible that contamination occurred in which control participants were exposed to the intervention, diluting intervention effect. Remote content delivery to personal devices reduced this risk. Additionally, time since AF diagnosis and CHA