Table 9.

Relationship between the max PLV of hippocampal-cortical spindles and spindle features

	$\beta$ original	t original	$\beta$ rankit	t rankit
Frequency (Hz)	0.784	1.92	1.315	2.419
Duration (s)	0.036	1.024	0.527	0.749
Amplitude (µV)	−58.78	−1.351	−4.45	−1.684
Frequency change (Hz/s)	−0.291	−0.944	−0.324	−0.544
N2 density (min−1)	0.577	0.534	0.41	0.585
N3 density (min−1)	0.413	0.372	0.306	0.474
Interspindle SD (Hz)	0.187	1.395	0.629	0.932
Intraspindle SD (Hz)	−0.204	−1.958	−1.125	−1.788

The first two columns correspond to the slope estimates from LMEMs for the relationship between PLV and spindle measures. The next two columns represent the slope estimates after rank inverse normal transformation of the data (rankit). The “$\beta$ original” estimates are in natural units whereas the “$\beta$ rankit” are normalized. An asterisk indicates significant after correction for multiple comparisons via FDR (p < 0.05). Results are not significantly changed after transformation. QQ plots before and after transformation are shown in Extended Data Table 9-1.