Table 4.

Indicative pairwise statistical comparisons and correlations of the summarized patterns (features) across the three cohorts.

Pattern	Statistical comparisons (P values)			Correlations (point biserial correlation coefficient)
	Control vs trauma	Control vs PTSDa	Trauma vs PTSD	Control vs trauma	Control vs PTSD	Trauma vs PTSD
IV2b	.06	.005 c	.06	0.22	0.33	0.21
Sleep entropy	.002	.005	.88	−0.34	−0.32	0.016
Awakenings total minutes	.25	.01	.16	0.14	0.30	0.16
Number wake ups	.33	.03	.06	0.12	0.27	0.21
WASOd total minutes	.41	.03	.05	0.10	0.26	0.21

^aPTSD: posttraumatic stress disorder.

^bIV2: intraday variability (1440 min).

^cStatistically significant associations (at the P=.05 level) are italicized. We present five indicative summarized patterns that exhibit the largest correlation magnitudes for the binary comparisons between groups. The negative signs in the correlations indicate that the summarized pattern generally exhibits lower scores for the first group in the comparison. Correlations with a magnitude over 0.3 are considered statistically strong. Further details are presented in Multimedia Appendices 1 and 2 (Multimedia Appendix 2 presents all the investigated variables).

^dWASO: wake after sleep onset.