Table 3.

Luna parameters, spindle features (mean +/− SD), and Pearson correlation values (p < .001) for the top linear multiple regression models predictive of fluid cognition for each central frequency (fc) value

cycles	fc (Hz)	q	th	Min (s)	Max (s)	Merge (s)	FFT (Hz)		Duration (s)		Density (spm)		Amplitude (uV)		Pearson’s r	95% CI
							Mean	SD	Mean	SD	Mean	SD	Mean	SD
10	9	0.8	3.5	0.3	2.4	1	9.19	0.22	0.83	0.12	0.06	0.03	32.70	29.91	0.21	[−0.07, 0.32]
12	9.5	−0.4	2	0.3	2.3	0.3	9.42	0.13	0.66	0.05	6.03	0.93	29.93	42.64	0.38	[0.05, 0.48]
6	10	0	2	0.3	2.8	0.6	10.02	0.33	0.66	0.08	2.34	0.45	32.29	45.97	0.36	[0.05, 0.45]
5	10.5	0.6	5	0.6	3	0.9	10.82	0.48	0.89	0.12	0.12	0.10	42.62	55.87	0.34	[0.05, 0.45]
7	11	1	3	0.7	3.9	0.4	11.31	0.42	0.96	0.12	0.08	0.07	32.76	8.56	0.42	[0.24, 0.51]
5	11.5	1	2	0.5	3.1	0.3	11.88	0.55	0.74	0.08	0.21	0.18	30.15	8.72	0.46	[0.25, 0.56]
10	12	1	4.5	0.3	3.1	0.8	12.07	0.31	0.79	0.10	0.25	0.18	30.81	8.27	0.46	[0.27, 0.56]
12	12.5	0	5	0.2	2.6	0.5	12.52	0.21	0.87	0.09	1.77	0.66	34.04	46.15	0.49	[0.30, 0.55]
9	13	−0.4	6	0.2	3	0.3	12.95	0.22	0.84	0.11	1.33	0.61	36.60	44.88	0.47	[0.16, 0.56]
6	13.5	0.8	2.5	0.2	2.4	0.4	13.31	0.35	0.68	0.10	0.88	0.48	33.47	68.80	0.46	[0.11, 0.54]
9	14	−0.2	6	0.4	3.9	0.2	13.72	0.27	0.82	0.10	1.30	0.64	34.80	47.25	0.49	[0.16, 0.57]
7	14.5	0	5	0.2	3.9	0.7	13.91	0.34	0.76	0.10	1.25	0.71	33.36	53.52	0.49	[0.17, 0.58]
5	15	0	5	0.4	3.9	0.7	13.98	0.42	0.74	0.10	0.83	0.61	32.30	52.45	0.50	[0.20,0.59]
6	15.5	0.3	5	0.4	2.6	0.7	14.32	0.43	0.74	0.09	0.60	0.49	30.79	54.78	0.50	[0.18, 0.60]
5	16	0.4	5	0.2	2.7	0.5	14.47	0.44	0.71	0.09	0.53	0.46	27.42	57.20	0.50	[0.18, 0.58]

fc, central frequency; th, threshold; q, quality metric.