| Chinese seafarers (Mean) | European seafarers (Mean) | Officers (Mean) | Ratings (Mean) |
Age | 34.18 (n = 461, SD = 9.16, S.E = 0.43) | 38.06 (n = 443, SD = 10.49, S.E = 0.49) | 36.66 (n = 486, SD = 9.81, S.E = 0.45) | 35.57 (n = 379, SD = 10.07, S.E = 0.52) |
Sailing Age | 8.36 (n = 469, SD = 7.78, S.E = 0.36) | 13.58 (n = 405, SD = 9.30, S.E = 0.46) | 11.59 (n = 480, SD = 9.16, S.E = 0.42) | 9.81 (n = 364, SD = 8.42, S.E = 0.44) |
Contract work hours (weekly) | 56.93 (n = 294, SD = 9.42, S.E = 0.55) | 58.57 (n = 341, SD = 14.05, S.E = 0.76) | 59.20 (n = 325, SD = 12.26, S.E = 0.68) | 56.34 (n = 284, SD = 11.90, S.E = 0.71) |
Actual work hours (weekly) | 60.40 (n = 283, SD = 10.58, S.E = 0.63) | 63.58 (n = 382, SD = 14.11, S.E = 0.72) | 64.52 (n = 346, SD = 12.62, S.E = 0.68) | 59.73 (n = 291, SD = 12.72, S.E = 0.75) |
Amount of time at sea | 7.91 (n = 367, SD = 1.23, S.E = 0.07) | 5.32 (n = 367, SD = 1.82, S.E = 0.10) | 6.13 (n = 408, SD = 2.26, S.E = 0.11) | 7.29 (n = 298, SD = 1.51, S.E = 0.87) |
Actual sleep | 8.06 (n = 444, SD = 1.61, S.E = 0.07) | 8.06 (n = 441, SD = 1.94, S.E = 0.09) | 7.82 (n = 484, SD = 1.76, S.E = 0.08) | 8.38 (n = 365, SD = 1.78, S.E = 0.09) |
Ideal sleep | 8.68 (n = 457, SD = 1.22,S.E = 0.06) | 7.76 (n = 442, SD = 1.52, S.E = 0.07) | 8.13 (n = 490, SD = 1.42, S.E = 0.06) | 8.36 (n = 373, SD = 1.50, S.E = 0.08) |
Sleep quality | 1.24 (n = 472, SD = 0.59, S.E = 0.03) | 0.86 (n = 452, SD = 0.47, S.E = 0.02) | 1.16 (n = 501, SD = 0.56, S.E = 0.03) | 0.93 (n = 386, SD = 0.55, S.E = 0.03) |
Distress at work | 1.39 (n = 420, SD = 0.81,S.E = 0.04) | 0.73 (n = 424, SD = 0.61, S.E = 0.03) | 1.21 (n = 475, SD = 0.79, S.E = 0.04) | 0.87 (n = 342, SD = 0.74, S.E = 0.04) |
Tiredness at work | 2.17 (n = 449, SD = 0.91, S.E = 0.04) | 1.71 (n = 431, SD = 0.82, S.E = 0.04) | 2.09 (n = 472, SD = 0.87, S.E = 0.04) | 1.78 (n = 374, SD = 0.89, S.E = 0.05) |