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Table 4 Comparison of relative EEG spectral power among the experimental groups

From: Sleep EEG characteristics associated with total sleep time misperception in young adults: an exploratory study

Variable

GS (n = 10)

IWHM (n = 18)

IWLM (n = 19)

Statistics

Frontal derivation

 Delta (1–4 Hz)

87.96 [79.34, 90.48]

80.74 [75.23, 83.99]

80.81 [76.26, 85.81]

H = 5.046, P = 0.080

 Theta (4–8 Hz

5.85 [4.54, 8.54]

7.39 [6.24, 9.56]

7.20 [6.61, 10.78]

H = 3.820, P = 0.148

 Alpha (8–12 Hz)

3.77 [2.49, 6.48]

5.08 [3.56, 6.84]

5.10 [3.80, 8.26]

H = 2.767, P = 0.251

 Sigma (12–16 Hz)

1.31 [1.16, 2.71]

2.51 [1.75, 3.35]

2.15 [1.62, 4.32]

H = 3.498, P = 0.174

 Beta (16–32 Hz)

1.26 [1.09, 2.00]

2.50 [1.54, 3.49]

1.94 [1.65, 2.99]

H = 5.756, P = 0.056

 Beta /Delta

0.01 [0.01, 0.03]

0.03 [0.02,0.04]a

0.03 [0.02, 0.04]

H = 6.904, P = 0.032

 Beta/Theta

0.27 [0.17, 0.37]

0.34 [0.23, 0.53]

0.25 [0.18, 0.36]

H = 1.907, P = 0.385

 Alpha/Delta

0.04 [0.03, 0.08]

0.07 [0.04, 0.09]

0.07 [0.04, 0.11]

H = 3.183, P = 0.204

 Alpha/Theta

64.00 ± 16.42

76.60 ± 41.44

74.32 ± 30.73

F = 0.487, P = 0.618

Central derivation

 Delta (1–4 Hz)

78.42 [74.84, 86.28]

74.67 [66.94, 82.17]

77.34 [74.20, 82.11]

H = 3.930, P = 0.140

 Theta (4–8 Hz

10.04 [6.57, 10.67]

9.98 [8.57, 11.37]

9.54 [8.07, 12.22]

H = 0.281, P = 0.869

 Alpha (8–12 Hz)

5.74 [3.51, 7.13]

5.94 [4.59, 9.21]

4.84 [4.01, 7.00]

H = 2.483, P = 0.289

 Sigma (12–16 Hz)

3.11 [2.35, 4.39]

4.39 [3.15, 6.77]

3.29 [2.62, 4.55]

H = 5.447, P = 0.066

 Beta (16–32 Hz)

1.72 [1.43, 3.05]

2.79 [1.51, 4.42] a

2.00 [1.45, 3.38]

H = 3.121, P = 0.210

 Beta /Delta

0.02 [0.02, 0.04]

0.04 [0.02, 0.06]

0.03 [0.02, 0.04]

H = 3.087, P = 0.214

 Beta/Theta

0.18 [0.15, 0.31]

0.28 [0.20, 0.43]

0.20 [0.15, 0.35]

H = 2.385, P = 0.303

 Alpha/Delta

0.07 [0.04, 0.09]

0.08 [0.05, 0.14]

0.06 [0.05, 0.09]

H = 2.632, P = 0.268

 Alpha/Theta

0.57 [0.47, 0.66]

0.58 [0.51, 0.92]

0.52 [0.42, 0.75]

H = 1.774, P = 0.412

  1. GS: good sleeper; IWLM: insomnias with a low mismatch; IWHM: insomnias with a high mismatch
  2. The statistical value H represents the use of a Kruskal–Wallis non-parametric analysis among three group using a Bonferroni correction for post-hoc analysis, while the statistical value F represents the use of a one-way ANOVA using the least significant difference test for post-hoc analysis. aP < 0.05 versus GS. There was no difference between the IWHW and IWLW groups