Table 2.

Univariate Robust Regression Models Showed That Neonatal Polysomnography Variables and Neurological Examination (Thompson) Scores Predicted 18- to 22-Month Developmental Outcomes, Whereas Gestational age did not.

	Bayley-III subscale	Beta	Coefficient p-value	R 2	N
Percent quiet sleep	Cognitive	−59.12	.007	0.25	28
Percent quiet sleep	Language	−65.69	.032	0.17	27
Percent quiet sleep	Motor	−77.15	.004	0.30	26
Sleep wake Walsh spectral entropy	Cognitive	−0.70	.98	0.018	28
Sleep wake Walsh spectral entropy	Language	−54.15	.17	0.074	27
Sleep wake Walsh spectral entropy	Motor	−58.91	.050	0.24	26
Quiet sleep 0.5–2 Hz EEG power	Cognitive	23.38	.22	0.060	28
Quiet sleep 0.5–2 Hz EEG power	Language	77.85	.0005	0.39	27
Quiet sleep 0.5–2 Hz EEG power	Motor	70.35	.0012	0.36	26
Active sleep 0.5–2 Hz EEG power	Cognitive	28.8	.35	0.042	27
Active sleep 0.5–2 Hz EEG power	Language	66.6	.087	0.12	26
Active sleep 0.5–2 Hz EEG power	Motor	94.6	.010	0.26	25
Gestational age	Cognitive	1.08	.65	0.023	28
Gestational age	Language	1.47	.68	0.008	27
Gestational age	Motor	−1.87	.57	0.056	26
Thompson score	Cognitive	−1.81	.001	0.37	28
Thompson score	Language	−1.39	.16	0.08	27
Thompson score	Motor	−1.26	.10	0.18	26

Bayley-III = Bayley Scales of Infant Development, 3rd edition.