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.
Overview of the study design
*1 For the evaluation of long-term use (3 years) the absence of cancer until the end of 2014 was required; follow-up started at the beginning of 2015.
*2 Depicted is the lag time of the main analysis (lag time of 1 year); for the evaluation of long-term use (3 years), no lag time was included.
*3 Data censored because of death, end of insurance cover, or end of study.
