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. 2015 Nov 19;9:624. doi: 10.3389/fnhum.2015.00624

Table 7.

Genetic variance analysis, type of estimate applied (GCT: combined among- and within-twin pair component estimate, GWT: within-pair estimate) and intraclass correlation coefficients (ICCs) for spindle parameters in slow wave sleep.

Variable Type P Analysis ICC MZ ICC DZ ICC MZ cn ICC DZ cn
EEG channel: F3A2
Number of spindles Slow* 0.94 (0.46, 0.12) 0.14 (0.61, 0.18) 0.92 (0.35, 0.09) 0.76 (0.46, 0.13)
Fast 0.204 GWT 0.41 (0.53, 0.12) 0.45 (0.76, 0.14) 0.84 (0.41, 0.08) 0.93 (0.61, 0.11)
Spindle density Slow* 0.96 (0.47, 0.12) 0.05 (0.62, 0.18) 0.96 (0.32, 0.08) 0.91 (0.46, 0.13)
Fast 0.677 GWT 0.45 (0.55, 0.12) 0.51 (0.74, 0.17) 0.81 (0.35, 0.08) 0.89 (0.57, 0.11)
Spindle length Slow <0.001 GCT 0.98 (0.57, 0.11) 0.45 (0.69, 0.18) 0.92 (0.42, 0.08) 0.89 (0.49, 0.13)
Fast 0.010 GWT 0.78 (0.44, 0.13) 0.42 (0.64, 0.19) 0.66 (0.35, 0.09) 0.85 (0.44, 0.13)
Spindle amplitude Slow <0.001 GCT 0.89 (0.45, 0.13) 0.16 (0.65, 0.20) 0.91 (0.34, 0.09) 0.78 (0.45, 0.13)
Fast <0.001 GCT 0.83 (0.48, 0.12) −0.30 (0.61, 0.19) 0.88 (0.34, 0.08) 0.60 (0.47, 0.13)
Spindle frequency Slow 0.052 GWT 0.91 (0.45, 0.12) 0.81 (0.66, 0.19) 0.93 (0.33, 0.08) 0.97 (0.48, 0.13)
Fast 0.027 GWT 0.86 (0.49, 0.13) 0.73 (0.58, 0.18) 0.85 (0.35, 0.09) 0.90 (0.48, 0.13)
EEG channel: P3A2
Number of spindles Slow 0.005 GCT 0.88 (0.42, 0.12) 0.45 (0.66, 0.19) 0.89 (0.34, 0.08) 0.87 (0.46, 0.13)
Fast 0.049 GWT 0.54 (0.49, 0.11) 0.15 (0.71, 0.19) 0.90 (0.35, 0.09) 0.83 (0.54, 0.12)
Spindle density Slow 0.030 GWT 0.90 (0.53, 0.13) 0.64 (0.70, 0.20) 0.93 (0.36, 0.09) 0.95 (0.50, 0.13)
Fast 0.071 GWT 0.68 (0.45, 0.12) 0.21 (0.59, 0.18) 0.88 (0.34, 0.08) 0.81 (0.50, 0.13)
Spindle length Slow <0.001 GCT 0.88 (0.57, 0.11) 0.46 (0.70, 0.20) 0.88 (0.39, 0.08) 0.90 (0.47, 0.13)
Fast 0.020 GWT 0.74 (0.48, 0.13) 0.47 (0.63, 0.19) 0.80 (0.34, 0.09) 0.94 (0.50, 0.13)
Spindle amplitude Slow 0.004 GWT 0.83 (0.44, 0.12) 0.41 (0.63, 0.19) 0.79 (0.33, 0.09) 0.73 (0.48, 0.12)
Fast 0.004 GCT 0.80 (0.49, 0.12) 0.29 (0.62, 0.19) 0.84 (0.35, 0.09) 0.56 (0.48, 0.13)
Spindle frequency Slow 0.049 GWT 0.82 (0.45, 0.12) 0.69 (0.63, 0.19) 0.88 (0.33, 0.08) 0.93 (0.48, 0.13)
Fast 0.001 GWT 0.94 (0.47, 0.13) 0.77 (0.64, 0.18) 0.93 (0.32, 0.08) 0.96 (0.48, 0.13)

Abbreviations explanation as in Table 6. *Analysis of variance not applicable (significant differences between the means in DZ and MZ twin set).