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.
Number of impaired cognitive outcomes per patient among study participant and the distribution of number of outcomes in the study population. An impaired outcome is defined by a Z-score ≤ 1.5 in any cognitive test explained in detail in Methods.
