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Table 3 Comparison of absolute EEG spectral power among the experimental groups (μν2)

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) 46.47 ± 21.05 37.61 ± 15.30 46.65 ± 25.95 F = 0.981, P = 0.383
 Theta (4–8 Hz 2.90 [2.29, 4.22] 3.23 [2.67, 3.99] 4.91 [2.59, 5.83] H = 3.481, P = 0.175
 Alpha (8–12 Hz) 1.87 [1.16, 3.37] 2.53 [1.55, 2.99] 2.78 [1.97, 3.89] H = 2.693, P = 0.260
 Sigma (12–16 Hz) 0.80 [0.55, 1.27] 1.09 [0.69, 1.56] 1.40 [0.88, 1.76] H = 4.137, P = 0.126
 Beta (16–32 Hz) 0.71 [0.57, 0.99] 1.08 [0.69, 1.80] 1.06 [0.79, 1.50] H = 4.062, P = 0.131
 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 [0.05, 0.11] H = 3.086, P = 0.214
 Alpha/Theta 64.00 ± 16.43 76.60 ± 41.44 74.33 ± 30.73 F = 0.487, P = 0.618
Central derivation
 Delta (1–4 Hz) 37.99 ± 12.36 33.89 ± 19.01 46.48 ± 20.94 F = 2.154, P = 0.128
 Theta (4–8 Hz 4.77 [3.37, 4.99] 4.11 [3.21, 4.63] 4.93 [2.98, 8.85] H = 2.872, P = 0.238
 Alpha (8–12 Hz) 2.51 [1.66, 3.24] 2.79 [1.89, 3.52] 2.70 [1.83, 4.02] H = 0.710, P = 0.701
 Sigma (12–16 Hz) 1.43 [1.04, 1.84] 1.66 [1.21, 2.76] 1.75 [1.37, 2.51] H = 2.625, P = 0.269
 Beta (16–32 Hz) 0.81 [0.66, 1.25] 1.29 [0.87, 1.62] 1.16 [0.72, 1.65] H = 2.139, P = 0.343
 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 [015, 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. 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
  2. aP < 0.05 versus GS. There was no difference between the IWHW and IWLW groups