Table 1 Descriptive statistics for sleep-wake characteristics and tests of differences between sleep deprived and normal sleep-wake groups for each characteristic.

From: Evidence for widespread alterations in cortical microstructure after 32 h of sleep deprivation

 

Sleep-wake (n = 23)

Sleep deprived (n = 18)

t-test of group differences

Age

25.7 (6.97)

26.28 (7.05)

t = −0.26 (df = 36.46,

p = 0.79, g = −0.08)

Sex (% women)

15 (65%)

11 (61%)

t = 0.26 (df = 36.14,

p = 0.79, g = 0.08)

PSQI (0–42)a

4.5 (1.92)

4.78 (1.86)

t = −0.46 (df = 36.85,

p = 0.65, g = −0.14)

MEQ (16 – 86)a

50.52 (9.16)

50.11 (8.02)

t = 0.15 (df = 37.8,

p = 0.88, g = 0.05)

BIS (0 – 42)a

7.25 (5.25)

6.39 (4.1)

t = 0.58 (df = 37.94,

p = 0.56, g = .18)

ES (0 – 24)a

6.55 (4.48)

5.72 (2.63)

t = 0.72 (df = 34.79,

p = 0.47, g = .21)

Mean TST week before study start (h.hh)1,a

7.02 (0.93)

6.9 (0.94)

t = 0.41 (df = 36.33,

p = 0.68, g = .13)

Mean TST night before study start (h.hh)1,b

6.42 (0.79)

6.54 (1.31)

t = −0.34 (df = 25.64,

p = 0.74, g = −0.11)

Mean TST night of study (h.hh)

6.63 (0.78)

-

-

Change in KSS (0 – 28 h into study)c

−0.57 (1.5)

2.18 (2.96)

t = −3.63 (df = 23.61,

p = 0.001 = g = −0.42)

Change in PVT (0 – 30 h into study)d

1.43 (3.34)

3.94 (6.45)

t = −0.9 (df = 27.88,

p = 0.35, g = 0.28)

  1. Mean (standard deviation).
  2. PSQI Pittsburgh Global Sleep Quality Index, MEQ Horne-Östberg Morningness Eveningness Questionnaire, BIS Bergen Insomnia Scale, ES Epworth Sleepiness Scale, TST total sleep time, KSS Karolinska Sleepiness Scale, PVT psychomotor vigilance test, df degrees of freedom, p p-value, g Hedges g.
  3. 1Reported total sleep time as measured by sleep diary and controlled against actigraphy.
  4. aMissing for one participant.
  5. bMissing for five participants.
  6. cMissing for four participants.
  7. dMissing for eleven participants.
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