Table I.
The mean number of sleep hours during the overnight shift for every study participant
| Subject no. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Hours of sleep | 1.5 | 3 | 3 | 3 | 2 | 3 | 1.5 | 1.5 | 2 | 3 | 2 | 3 | 2.5 | 4 | 3 | 4 | 4 | 3 | 2 | 4 |
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