Evaluating the reliability of the Attitudes to Randomized Trial Questionnaire (ARTQ) in a predominantly African American sample.
OBJECTIVE
To evaluate the reliability of the Attitudes to Randomized Trial Questionnaire (ARTQ) in measuring perceptions of cancer clinical trials in a predominantly African American (AA) sample in South Carolina (SC).


METHODS
Principal Component Analysis (PCA) and Cronbach's alpha estimates were used to assess the reliability of the ARTQ in a convenience sample of 315 participants (81.4 % AA) who were recruited from 2008 to 2013, and who live in eleven different counties in South Carolina with high rates of racial disparities in cancer mortality rates.


RESULTS
Slightly more than half of the 315 participants had at least a college education (77.9 %), 84.8 % were female, and 53.1 % had an annual income of $40,000 or more. In this study, PCA confirmed that the ARTQ is unidimensional. Cronbach's alpha for the ARTQ was 0.86.


CONCLUSIONS
The ARTQ displayed strong evidence of high statistical reliability. This analysis has great implications for future research because it represents the first test of reliability of the ARTQ in a predominantly African American sample and lays the groundwork for use of the ARTQ in future studies in diverse populations.
Cancer Disparities Program, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC USA ; Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC USA.
Marvella E
ME
Ford
Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC USA.
Wei
W
Wei
College of Medicine, Medical University of South Carolina, Charleston, SC USA.
Leslie A
LA
Moore
College of Nursing, Medical University of South Carolina, Charleston, SC USA.
Dana R
DR
Burshell
Cancer Disparities Program, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC USA ; Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC USA.
Kimberly
K
Cannady
South Carolina State University, Orangeburg, SC USA.
Franshawn
F
Mack
College of Medicine, Medical University of South Carolina, Charleston, SC USA.
Nnadozie
N
Ezerioha
College of Charleston, Charleston, SC USA.
Kelley
K
Ercole
Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC USA.
Elizabeth
E
Garrett-Mayer
African Americans; Cancer; Clinical trials; Perceptions; Psychometric testing