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.
The standardized mean difference (SMD) between attending-only and teaching service cohorts across 25 covariates spanning demographic data, initial vital signs, and existing diagnoses. For a given covariate, the SMD is defined as the difference between the mean value for each cohort divided by the pooled standard deviation.
