Table 1

Comparison of demographic characteristics of participants at study enrolment by study arm

Control armTreatment arm
n=514n=516
Age in years
 Median (IQR)30 (24 to 43)30 (23 to 42)
% (95% CI)% (95% CI)
Gender
 Male56.2 (51.8 to 60.6)52.5 (48.1 to 56.9)
 Female43.8 (39.4 to 48.2)47.5 (43.1 to 51.9)
Ethnicity/Race
 White, non-Hispanic57.8 (53.4 to 62.2)55.8 (51.4 to 60.2)
 White, Hispanic10.3 (7.6 to 13)8.7 (6.2 to 11.2)
 Black/African-American, non-Hispanic23.0 (19.3 to 26.7)26.7 (22.8 to 30.6)
 Black/African-American, Hispanic6.0 (3.9 to 8.1)5.2 (3.2 to 7.2)
 Other2.9 (1.4 to 4.4)3.5 (1.9 to 5.1)
Years of formal education
 <12 years34.6 (30.4 to 38.8)40.1 (35.8 to 44.4)
 Grade 1229.8 (25.8 to 33.8)30.2 (26.2 to 34.2)
 College 1–3 years27.2 (23.3 to 31.1)23.1 (19.4 to 26.8)
 College 4 years (college graduate)/>College8.4 (6.0 to 10.8)6.6 (4.4 to 8.8)
Baseline health insurance status
 Private22.4 (18.7 to 26.1)21.7 (18.1 to 25.3)
 Governmental38.9 (34.6 to 43.2)39.7 (35.4 to 44.0)
 None38.7 (34.4 to 43.0)38.6 (34.3 to 42.9)
Baseline partner status
 Married12.1 (9.2 to 15.0)11.8 (9.0 to 14.6)
 Divorced/Widowed/Separated14.6 (11.5 to 17.7)17.8 (14.4 to 21.2)
 Never married52.5 (48.1 to 56.9)51.6 (47.2 to 56.0)
 Unmarried couple20.8 (17.2 to 24.4)18.8 (15.4 to 22.2)
Homeless status
 Currently homeless11.5 (8.7 to 14.3)12.6 (9.7 to 15.5)
 Past 12 months homeless8.2 (5.8 to 10.6)9.1 (6.6 to 11.6)
 Never/Not homeless past 12 months80.4 (76.9 to 83.9)78.3 (74.7 to 81.9)
Employment status
 Disability19.8 (16.3 to 23.3)22.5 (18.8 to 26.2)
 Employed39.5 (35.2 to 43.8)32.8 (28.7 to 36.9)
 Student7.8 (5.4 to 10.2)8.0 (5.6 to 10.4)
 Unemployed32.9 (28.8 to 37)36.8 (32.6 to 41)
Usual source of medical care
 Private clinic/practice26.5 (22.6 to 30.4)27.1 (23.2 to 31)
 Hospital or community health clinics29.8 (25.8 to 33.8)30.4 (26.4 to 34.4)
 Emergency department40.7 (36.4 to 45)39.9 (35.6 to 44.2)
 Urgent care centre2.7 (1.3 to 4.1)2.5 (1.1 to 3.9)
 Don’t know/refuse to answer0.4 (0.0 to 1.0)0.0 (0.0 to 0.0)
Born in USA
 Yes92.8 (90.5 to 95.1)92.4 (90.1 to 94.7)
 No7.2 (4.9 to 9.5)7.6 (5.3 to 9.9)
Family status
 Never had children43.4 (39.0 to 47.8)40.5 (36.2 to 44.8)
 Children≤17 years old41.6 (37.3 to 45.9)45.5 (41.1 to 49.9)
 Children>17 years old15.0 (11.9 to 18.1)14.0 (10.9 to 17.1)