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.
Correlation between time since last medication (x-axis) versus Unified Parkinson’s Disease Rating Scale III (UPDRS III) scores (y-axis) for the (a) placebo and (b) niacin groups. The UPDRS III scores and the change in the time between the last dose of medication and the appointment were used to calculate the difference between visits; this data was used to construct dot plots and run a correlation analysis.
