Table 1. Average sleep duration, alertness, mood and performance according to circadian rhythm type.
| Parameter | Mean raw data (SEM) | ||||
|---|---|---|---|---|---|
| Abnormally entrained advanced n = 4 | Normally entrained n = 26 | Abnormally entrained delayed n = 5 | Non-entralned n = 17 | Group | |
| n = 4 | n = 25 | n = 5 | n = 17 | ||
| Night-time sleep duration (h)* | 5.64 (0.55) | 6.70 (0.20) | 5.05 (0.70) | 5.49 (0.27) | 6.05 (0.18) |
| Total sleep time (h)* | 6.00 (0.49) | 6.88 (0.19) | 5.59 (0.39) | 5.96 (0.26) | 6.38 (0.15) |
| n = 4 | n = 24 | n = 5 | n = 16 | ||
| Alert – sleepy (1–9) | 4.36 (0.40) | 4.71 (0.20) | 4.64 (0.59) | 4.38 (0.26) | 4.57 (0.14) |
| Cheerful – miserable (1–9) | 3.82 (0.48) | 4.08 (0.13) | 4.79 (0.53) | 4.07 (0.20) | 4.13 (0.11) |
| Calm – tense (1–9) | 3.79 (0.56) | 4.22 (0.16) | 4.97 (0.53) | 4.27 (0.32) | 4.28 (0.15) |
| Depressed – elated (1–9) | 5.49 (0.43) | 5.20 (0.07) | 4.88 (0.32) | 5.08 (0.15) | 5.15 (0.08) |
| n = 3 | n = 20 | n = 3 | n = 15 | ||
| RT all responses (cs) | 55.22 (0.80) | 54.01 (2.21) | 61.53 (5.48) | 51.75 (3.03) | 53.82 (1.60) |
| RT incorrect responses (cs) | 33.90 (5.62) | 38.25 (3.68) | 38.39 (6.06) | 32.40 (3.34) | 35.80 (2.24) |
| RT correct responses (cs) | 55.16 (0.77) | 53.71 (2.15) | 61.89 (5.88) | 51.85 (2.99) | 53.73 (1.58) |
| % Incorrect | 3.02 (0.72) | 9.86 (3.99) | 5.35 (1.74) | 4.67 (0.96) | 7.13 (2.00) |
| % Lapses >1 s | 6.21 (1.22) | 6.70 (2.03) | 15.51 (4.02) | 4.14 (1.64) | 6.37 (1.25) |
RT, reaction time.
*
P < 0.05 between circadian rhythm groups.