Histogram
Usual number of hours of sleep per night, on weekends or days off, over the last 4 weeks vs Study Visit
| Intake | Visit 1 | Visit 2 | Visit 3 | Visit 4 | |
|---|---|---|---|---|---|
| Total | 433 | 433 | 433 | 433 | 433 |
| < 3 hours | - | - | - | 2 | - |
| 3.5 hours | 2 | - | - | 1 | - |
| 4 hours | 4 | - | 3 | - | - |
| 4.5 hours | 2 | - | 1 | - | - |
| 5 hours | 6 | - | 3 | 2 | - |
| 5.5 hours | 2 | - | 9 | 2 | - |
| 6 hours | 20 | - | 19 | 19 | - |
| 6.5 hours | 11 | - | 12 | 16 | - |
| 7 hours | 43 | - | 40 | 42 | - |
| 7.5 hours | 29 | - | 22 | 20 | - |
| 8 hours | 62 | - | 37 | 33 | - |
| 8.5 hours | 19 | - | 8 | 3 | - |
| 9 hours | 19 | - | 14 | 9 | - |
| 9.5 hours | 4 | - | - | - | - |
| 10 hours | 1 | - | 1 | 1 | - |
| 10.5 hours | - | - | - | - | - |
| 11 hours | - | - | - | - | - |
| > 11 hours | - | - | 1 | 1 | - |
| Unknown | 209 | 433 | 263 | 282 | 433 |