|
Ezell 2013 [37]
|
Post-hoc analysis method
|
All partcipants were offered the possibility of receiving incentives ($80) for completion of all program modules and surveys)
|
4 retention strategies (re-dials of non-working telephone numbers, mailings to the student’s home, obtaining assistance from school administration and communication through Facebook) were used to reconnect with partcipants who were overdue for the 12-month follow-up surveys
|
The increase in overall questionnaire response (i.e. retention) rate was 21.6% at 12-month follow-up
|
No secondary end point reported
|
|
Sellers 2015 [38]
|
Before and after study
|
The first 1686 participants received routine strategies (support groups, home visits, transportation to and from study visits, frequent attempts to contact clients to reschedule missed visits)
|
The subsequent 683 participants received enhanced intensive tracing efforts (broadcast a radio announcement in Chichewa, the local language, hiring a community educator to trace missing participants via motorcycle)
|
Intensive tracing efforts increased the overall response rate from 80% to 87.8% at 28 weeks after randomisation
|
No secondary end point reported
|
