Table 3.
The comparison of sleep time between harbor and sea and between day-watch and night-watch (N = 51).
| Sleep Parameters | Moored (N = 17) | Sailing (N = 34) | t (df) | p -Value |
| Mean (SD) | Mean (SD) | |||
| Total Sleep Time | 304.41 (163.37) | 267.77 (108.83) | −1.63 (78.9) | 0.107 |
| Number of Awakenings | 10.31 (9.90) | 14.31 (9.60) | 2.74 (101.2) | 0.007 |
| Sleep Fragmentation Index | 14.56 (14.04) | 22.31 (14.93) | 3.56 (238) | < 0.001 |
| Sleep Parameters | Day-Watch (N = 13) | Night-Watch (N = 21) | t (df) | p -Value |
| Mean (SD) | Mean (SD) | |||
| Total Sleep Time | 287.05 (123.33) | 248.17 (88.28) | −2.03 (57) | 0.047 |
| Number of Awakenings | 14.88 (10.62) | 12.09 (8.12) | −1.59 (57) | 0.118 |
| Sleep Fragmentation Index | 18.44 (12.56) | 21.00 (13.93) | 1.24 (57) | 0.220 |
SD = standard deviation.