EPCT Enrollment Total  
  Enrolled(n= 50) Non-Enrolleda(n= 50) (N=100)  
  n % n % N % pb
Patient's age: mean, (SD) 56.14 (11.5)   54.24 (13.9)   55.19 (12.7)   0.457 
Gender              
  Male 28 56.0 21 42.0 49 49.0 0.161
Place of birth              
  United States 47 94.0 40 80.0 87 87.0 0.026
  Mexico 1 2.0 9 18.0 10 10.0  
  Other 2 4.0 1 2.0 3 3.0  
Ethnicity              
  White (non-Hispanic) 39 78.0 8 16.0 47 47.0 <0.001
  Hispanic/Latino 8 16.0 31 62.0 39 39.0  
  Other 3 6.0 11 22.0 14 14.0  
Marital status              
  Married/Living with a significant other 39 78.0 26 52.0 65 65.0 0.028
  Separated/Divorced 5 10.0 7 14.0 12 12.0  
  Widowed 2 4.0 10 20.0 12 12.0  
  Single/Never married 4 8.0 7 14.0 11 11.0  
Educational level              
  High School or less 19 38.0 38 76.0 57 57.0 0.001
  Technical/Some College 12 24.0 6 12.0 18 18.0  
  College Degree or higher 19 38.0 6 12.0 25 25.0  
Employment status              
  Employed 19 38.0 10 20 29 29.0 0.002
  Retired 17 34.0 7 14 24 24.0  
  Disabled 10 20.0 19 38.0 29 29.0  
  Unemployed 4 8.0 14 28.0 18 18.0  
Have healthcare plan              
  Yes 46 92.0 41 82.0 87 87.0 0.137 
Yearly Household Income              
  $25,000 or less 21 42.0 43 86.0 64 64.0 <0.001
  $26,000 - $50,000 9 18.0 6 12.0 15 15.0  
  $51,000 and above 20 40.0 1 2.0 21 21.0  
Have participated in clinical trials before              
  Yes 15 30.0 1 2.0 16 16.2 <0.001 
aNon- Enrolled patients were not asked by their doctor to participate in an EPCT but responded no to a hypothetical question asking them if they would participate if offered that option.
bTwo-sided p-value from Chi-square tests for comparison of proportions and independent t-test for comparison of means.
Table 1: Characteristics of Study Participants by Enrollment Status.