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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