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.
Median bias for scenarios with 30% non‐compliance and sample sizes of (a) n=100 and (b) n=1000 (results are stratified by cost distribution, and correlation between cost and QALYs; results for two‐stage least squares (not plotted) are identical to those for three‐stage least squares; model uBGN was not applied to normal cost data): 
, zero bias; 
, three‐stage least squares; 
, BFL; 
, uBN; 
, uBGN
