Table 10.

Comparing channels with high and low hippocampal-cortical phase-locking during spindles

	$\beta$ original	t original	$\beta$ rankit	t rankit
Frequency (Hz)	0.573	5.018*	0.857	4.524*
Duration (s)	0.024	2.827*	0.359	2.036
Amplitude (µV)	−11.74	−0.754	−0.50	−0.604
Frequency change (Hz/s)	−0.101	−1.062	−0.267	−1.326
N2 density (min−1)	0.767	2.484*	0.659	3.788*
N3 density (min−1)	0.717	2.25*	0.562	3.001*
Interspindle SD (Hz)	0.027	0.768	0.082	0.388
Intraspindle SD (Hz)	−0.15	−4.703*	−0.817	−4.306*

The first two columns correspond to the estimated difference in a LMEM in each spindle measure between high (>0.4 PLV) and low PLV cortical channels and significance of this estimate (low PLV is reference). The next two columns represent the difference after rank inverse normal transformation of the data (rankit). All measures show no change in significance after transformation (with p < 0.05 as |t| > 1.96). 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). QQ plots before and after transformation are shown in Extended Data Table 10-1.