Table 1.
Dataset characteristics by sleep schedule
| Fixed Sleep | Habitual Sleep | Shift Work Diurnal | Shift Work Nights | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | Mean | SD | Min | Max | n | Mean | SD | Min | Max | N | Mean | SD | Min | Max | n | Mean | SD | Min | Max | |
| Sex (M, F) | 12, 3 | 11, 3 | 7, 22 | 4, 15 | ||||||||||||||||
| Age (years) | 15 | 26.01 | 6.38 | 20.70 | 45.54 | 14 | 26.35 | 6.62 | 20.70 | 45.54 | 29 | 31.83 | 7.69 | 23.00 | 58.00 | 19 | 34.89 | 10.86 | 24.00 | 64.00 |
| BMI (kg/m2) | 15 | 22.70 | 2.52 | 19.20 | 28.22 | 14 | 22.55 | 2.61 | 19.20 | 28.22 | 29 | 24.23 | 4.14 | 15.90 | 32.00 | 19 | 24.38 | 3.60 | 15.90 | 29.70 |
| MEQ Score | 15 | 39.07 | 3.24 | 34.00 | 45.00 | 14 | 38.57 | 3.59 | 34.00 | 45.00 | 29 | 38.07 | 6.50 | 23.00 | 52.00 | 19 | 39.11 | 6.57 | 28.00 | 52.00 |
| Mean Sleep Onset (h) | 15 | 23.30 | 0.72 | 22.25 | 24.29 | 14 | 24.06 | 0.88 | 22.72 | 25.42 | 29 | 23.44 | 0.48 | 22.63 | 24.44 | 19 | 9.56 | 1.65 | 7.19 | 14.47 |
| Mean Sleep Offset (h) | 15 | 6.86 | 0.71 | 5.78 | 7.92 | 14 | 7.68 | 1.09 | 5.71 | 9.45 | 29 | 7.15 | 1.20 | 5.60 | 10.09 | 19 | 15.05 | 1.81 | 11.18 | 17.66 |
| Mean Mid-sleep Time (h) | 15 | 3.08 | 0.71 | 2.01 | 4.07 | 14 | 3.87 | 0.84 | 2.22 | 5.18 | 29 | 3.30 | 0.75 | 2.34 | 5.27 | 19 | 12.30 | 1.37 | 9.19 | 15.09 |
| Salivary Melatonin Phase (h) | 15 | 2.57 | 0.86 | 0.42 | 4.02 | — | — | — | ||||||||||||
| Urinary aMT6s Acrophase (h) | 13 | 3.72 | 1.21 | 0.92 | 5.68 | 14 | 4.24 | 1.05 | 2.40 | 6.37 | 29 | 3.90 | 1.77 | 20.22 | 6.75 | 19 | 5.16 | 2.85 | 22.95 | 14.18 |
| Bedtime Phase Angle (h) | 13 | −4.43 | 1.26 | −6.43 | −2.61 | 14 | −4.18 | 1.35 | −6.26 | −1.60 | 29 | −4.33 | 2.04 | −7.12 | 4.22 | 19 | 4.14 | 3.44 | −5.66 | 9.95 |
| Waketime Phase Angle (h) | 13 | 3.12 | 1.30 | 1.21 | 5.28 | 14 | 3.43 | 1.08 | 1.68 | 5.43 | 29 | 3.38 | 2.38 | −1.14 | 13.87 | 19 | 9.64 | 3.10 | 1.22 | 14.23 |
| Length of pre-processed data set (days) | 13 | 5.84 | 0.63 | 4.65 | 7.60 | 14 | 5.40 | 1.04 | 3.02 | 6.12 | 29 | 4.55 | 1.79 | 1.56 | 8.90 | 19 | 3.36 | 0.86 | 1.67 | 5.29 |
Note: Phase angle calculated using aMT6s acrophase. N = 2 on FS do not have aMT6s acrophase (only melatonin), and thus were excluded from this calculation. BMI = body mass index, MEQ = Horne & Ostberg Composite Morningness-Eveningness Questionnaire, aMT6s = urinary 6-sulphatoxymelatonin.