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.
A. Average rate of change (and 95% confidence bounds) for ALSFRS-R, 50 kHz Phase (mean), and 50 kHz Phase (muscle with steepest slope). Note the marked linearity, especially for the single muscle data and the relatively smaller standard deviation in the data from the most rapidly progressing muscle. B. Associated sample size calculations.
