21.2. Analysis.
Comparison 21: B ‐ Monetary incentives: Addition of monetary incentives vs usual follow‐up, Outcome 2: Retention‐ sensitivity anlysis removing quasi‐RCTs
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.