Log-in Status and Duration
For the web-based tailored intervention only, program use data were used to evaluate whether participants logged into a given session and how long they spent logged in. Log-in status was defined based on whether a participant logged into a given session at all. The log-in duration was calculated based on the time stamp for logging in, requesting a page, and logging out. If a participant did not interact with the website for >30 minutes, then the session ended at the time the participant requested the last page. In a given week, the participants were able to log in and out of a content session multiple times to complete the session. Thus, log-in duration reflects the total accumulated time spent on a content session in a given week.