Table 1.
Usability participant demographics by device type
| Characteristic | SMS (n=10) | PDA (n=10) | Total N (%) |
|---|---|---|---|
| Age, yr | |||
| ≤65 | 7 | 6 | 13 (65) |
| >65 | 3 | 4 | 7 (35) |
| eGFR, ml/min per 1.73 m2 | |||
| ≥45 | 6 | 4 | 10 (50) |
| <45 | 4 | 6 | 10 (50) |
| Sex | |||
| Men | 5 | 7 | 12 (60) |
| Women | 5 | 3 | 8 (40) |
| Race | |||
| Black | 8 | 7 | 15 (75) |
| Nonblack | 2 | 3 | 5 (25) |
| Self-reported comorbidity | |||
| Diabetes | 6 | 8 | 14 (70) |
| CVD | 7 | 6 | 13 (65) |
| Cancer | 1 | 2 | 3 (15) |
| Education | |||
| Less than or equal to high school diploma | 2 | 4 | 6 (30) |
| More than high school diploma | 8 | 6 | 14 (70) |
| Annual household income | |||
| ≤$50,000 | 1 | 2 | 13 (65) |
| >$50,000 | 9 | 8 | 7 (35) |
| Computer usage | |||
| Access to computer | |||
| No | 1 | 1 | 2 (10) |
| Yes | 9 | 9 | 18 (90) |
| Ever used internet | |||
| No | 1 | 4 | 5 (25) |
| Yes | 9 | 6 | 15 (75) |
| Mobile telephone usage | |||
| Mobile telephone type | |||
| Cellular telephone | 7 | 9 | 16 (80) |
| Smartphone | 3 | 1 | 4 (20) |
| Used only for calls | |||
| No | 4 | 5 | 8 (42) |
| Yes | 6 | 5 | 11 (58) |
| Mobile telephone uses | |||
| Text messaging | 6 | 4 | 10 (50) |
| Mobile web | 3 | 2 | 5 (25) |
| Social networking | 2 | 1 | 3 (15) |
| Apps | 3 | 1 | 4 (20) |
| 4 | 1 | 5 (25) | |
| Camera | 6 | 4 | 10 (50) |
CVD, cardiovascular disease; SMS, short messaging service; PDA, personal digital assistant.