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.
Population disposition for effectiveness at 3–6- and 7–12-month follow-ups. “Lost to follow-up” means the centers could not contact the patients despite using different techniques (e.g., letter, phone call, email), so the patients exited the study. “Exam not available” means the patient did not attend this follow-up, but may have attended a later one. PP: per-protocol population; ITT: intent-to-treat population.
