Table 2.
Baseline Sleep Characteristics
Total (n=49) |
Low-Dose (n=23) |
High-Dose (n=26) |
p-value | |
---|---|---|---|---|
Average Sleep Parameters | ||||
Bedtime (h:min) | 10:54 PM | 10:50 PM | 10:57 PM | 0.73 |
Arising time (h:min) | 7:03 AM | 6:55 AM | 7:10 AM | 0.34 |
TIB (min) | 489.62 (47.43) | 485.30 (44.37) | 493.50 (50.54) | 0.55 |
TST (min) | 441.36 (42.52) | 440.0 (41.30) | 442.60 (44.35) | 0.84 |
SOL (min) | 5.27 (0.95) | 5.08 (0.90) | 5.44 (0.98) | 0.19 |
Activity counts (#) | 30,989.65 (15,210.13) | 29,001.80 (13,256.60) | 32,748.10 (16,813.30) | 0.40 |
WASO (min) | 42.99 (20.92) | 40.18 (19.12) | 45.48 (22.47) | 0.38 |
Number of awakenings (#) | 14.20 (4.53) | 13.51 (4.14) | 14.80 (4.84) | 0.32 |
Night-to-Night Variability (7-day SD) | ||||
Bedtime (min) | 57.20 (36.85) | 63.37 (41.42) | 51.73 (32.10) | 0.27 |
Arising time (min) | 50.89 (27.11) | 54.88 (32.41) | 47.35 (21.42) | 0.34 |
TIB (min) | 69.07 (45.26) | 77.35 (51.49) | 61.74 (38.48) | 0.23 |
TST (min) | 63.31 (37.34) | 68.78 (44.06) | 58.48 (30.29) | 0.34 |
SOL (min) | 1.36 (1.09) | 1.19 (0.93) | 1.50 (1.21) | 0.31 |
Activity counts (#) | 13,423.87 (10321.29) | 14,350.40 (11,817.70) | 12,604.20 (8,952.60) | 0.56 |
WASO (min) | 18.57 (9.96) | 19.35 (9.70) | 17.87 (10.32) | 0.61 |
Number of awakenings (#) | 4.52 (1.70) | 4.45 (1.79) | 4.58 (1.65) | 0.79 |
Night-to-Night Variability (CV) | ||||
Bedtime | 4.16 (2.69) | 4.64 (3.12) | 3.73 (2.21) | 0.24 |
Arising time | 11.79 (5.38) | 12.79 (6.25) | 10.90 (4.42) | 0.22 |
TIB | 14.12 (9.03) | 15.81 (9.79) | 12.62 (8.20) | 0.22 |
TST | 14.47 (8.59) | 15.63 (9.58) | 13.44 (7.66) | 0.38 |
SOL | 25.47 (18.90) | 24.73 (21.64) | 26.12 (16.51) | 0.80 |
Activity counts | 42.45 (18.23) | 47.80 (19.85) | 37.72 (15.54) | 0.05 |
WASO | 45.95 (16.85) | 51.49 (17.22) | 41.04 (15.20) | 0.03 |
Number of awakenings | 34.10 (13.90) | 34.48 (13.32) | 33.77 (14.64) | 0.86 |
Note. CV = coefficient of variation; SOL = sleep onset latency; TIB = total time in bed; TST = total sleep time; WASO = wake after sleep onset. Values presented are M (SD). P-values were obtained from t-tests, with statistical significance defined at the alpha < 0.05 level.