Losses to follow-up indicate that the participant was not seen at that visit or at any subsequent visits. Withdrawals and loss to follow-up indicates a change in the denominator of total participants remaining in the study. Besides the loss to follow-up, there are missing assessments at each timepoint, which indicate people who did not complete a given assessment, but were not entirely lost to follow-up (ie, they later returned and completed an assessment). AMMI=automated text messaging and monitoring. *Including 250 participants with HIV who were enrolled into ATN-147 and ATN-148. Study terminated at 12 months per sponsor. The analytical sample includes young people who completed at least one follow-up assessment. This group excludes participants who were lost to follow-up, withdrew, or were withdrawn before the 4-month follow-up.
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