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.
Effects of the fully observed covariates on a subject's probability to leave a questionnaire item unanswered, as estimated by a binomial regression model, for each MMSE cut-off point, under a LB estimation strategy. Black (white) symbols indicate significant (not significant) estimates at a .95 confidence level.
