Table 1.

Modifications to the EVMC protocol

Element and Phase	EVMC Protocol	Modified Protocol	Timing of Modification	Rationale
Collateral contact information (Engagement)	Collect contact information for at least three collaterals beyond immediate family	Did not collect contact information for collaterals beyond immediate family	After enrollment of first 38 participants	Participants often suspicious about how such information would be used Most participants living with parent(s) Fear of jeopardizing rapport
Interview scheduling (Engagement)	Schedule the date and time of next appointment at the end of each interview	Delayed scheduling until 1–4 weeks before target date	After enrollment of first 10 participants	More feasible for participants to schedule closer to target date Gave participants and parents more flexibility and control over scheduling
Interview confirmation (Confirmation)	Six weeks prior to next appointment, call participant every 24–48 hours until appointment is confirmed	Four weeks prior to next appointment, called once to remind participant One week prior, called every 24–48 hours until appointment was scheduled	After enrollment of first 10 participants	Kept participants and parents from feeling overwhelmed by phone contact Maintained flexibility in scheduling More feasible in terms of time and resources available to research staff
Lost participants (Confirmation)	If a participant is lost, first contact the three collaterals and then mobilize street outreach	Did not use street outreach	From start of study	Felt street outreach was too intrusive for this population Study lacked resources for travel to suburban areas (staff used public transportation)