. Author manuscript; available in PMC: 2015 Apr 23.

Published in final edited form as: Respir Med. 2009 Dec 4;104(4):578–583. doi: 10.1016/j.rmed.2009.09.023

Table 3.

Multivariate logistic regression model for factors associated with clinical trial participation.

Predictor variables	Odds ratio	95%CI	P value
Age, per additional decade	2.07	1.26, 3.41	0.004
Disease duration, per year	1.01	0.95, 1.07	0.823
College educated	0.47	0.18, 1.26	0.134
Oxygen therapy	2.08	0.93, 4.62	0.074
Presentation with chest pain	0.29	0.08, 1.05	0.059