Table 1.
Demographics of the full sample and of the mobile phone and tablet administration groupsa (see Multimedia Appendix 1).
| Demographics | Full Sample (N=129) | Mobile phone (N=63) | Tablet (N=66) | |
| Age; mean (standard deviation) | 43 (12) | 43 (11.28) | 44 (12.63) | |
| Sex; N (%) | ||||
| Female | 83 (65) | 41 (65) | 42 (64) | |
| Male | 45 (35) | 22 (35) | 23 (36) | |
| Race; N (%) | ||||
| Asian | 1 (1) | 1 (2) | 0 (0) | |
| African-American | 109 (86) | 52 (83) | 57 (86) | |
| Caucasian | 17 (13) | 9 (14) | 8 (12) | |
| Ethnicity; N (%) | ||||
| Non-Hispanic | 123 (98) | 59 (98) | 64 (98) | |
| Hispanic | 2 (2) | 1 (2) | 1 (2) | |
aMissing values: sex (1 in tablet group), race (1 in mobile phone group, 1 in tablet group), and ethnicity (3 in mobile phone group, 1 in tablet group)