Race
Visit vs 7 AM - how long since last caffeinated drink
| N | Mean | StdDev | Median | Min | Max | Unknown | Total | |
|---|---|---|---|---|---|---|---|---|
| Visit 5 | 727 | 4.5 | ± 0.8 | 5.0 | 1.0 | 5.0 | 8 | 735 |
Participant's age (category) vs 7 AM - how long since last caffeinated drink
Visit 5
| N | Mean | StdDev | Median | Min | Max | Unknown | Total | |
|---|---|---|---|---|---|---|---|---|
| Total | 650 | 4.5 | ± 0.8 | 5.0 | 1.0 | 5.0 | 8 | 658 |
| 5-14 yrs old | 63 | 4.5 | ± 0.8 | 5.0 | 1.0 | 5.0 | 1 | 64 |
| 15-24 yrs old | 112 | 4.6 | ± 0.6 | 5.0 | 1.0 | 5.0 | - | 112 |
| 25-34 yrs old | 62 | 4.5 | ± 0.7 | 5.0 | 1.0 | 5.0 | - | 62 |
| 35-44 years | 96 | 4.4 | ± 0.8 | 4.0 | 1.0 | 5.0 | 2 | 98 |
| 45-54 years | 145 | 4.5 | ± 0.7 | 5.0 | 1.0 | 5.0 | 3 | 148 |
| 55-64 years | 83 | 4.5 | ± 0.7 | 5.0 | 1.0 | 5.0 | 1 | 84 |
| 65-74 years | 56 | 4.3 | ± 1.0 | 4.5 | 1.0 | 5.0 | 1 | 57 |
| 75-84 years | 31 | 4.1 | ± 1.1 | 4.0 | 1.0 | 5.0 | - | 31 |
| 85 years or older | 2 | 4.5 | ± 0.7 | 4.5 | 4.0 | 5.0 | - | 2 |
Participant's sex vs 7 AM - how long since last caffeinated drink
Visit 5
| N | Mean | StdDev | Median | Min | Max | Unknown | Total | |
|---|---|---|---|---|---|---|---|---|
| Total | 727 | 4.5 | ± 0.8 | 5.0 | 1.0 | 5.0 | 8 | 735 |
| Female | 404 | 4.4 | ± 0.9 | 5.0 | 1.0 | 5.0 | 2 | 406 |
| Male | 323 | 4.5 | ± 0.6 | 5.0 | 1.0 | 5.0 | 6 | 329 |
Participant's race vs 7 AM - how long since last caffeinated drink
Visit 5
| N | Mean | StdDev | Median | Min | Max | Unknown | Total | |
|---|---|---|---|---|---|---|---|---|
| Total | 727 | 4.5 | ± 0.8 | 5.0 | 1.0 | 5.0 | 8 | 735 |
| White | 302 | 4.4 | ± 0.7 | 4.0 | 1.0 | 5.0 | 2 | 304 |
| Black | 403 | 4.5 | ± 0.8 | 5.0 | 1.0 | 5.0 | 6 | 409 |
| More than one race | 22 | 4.5 | ± 0.5 | 5.0 | 4.0 | 5.0 | - | 22 |