Table 4.

Estimated marginal means and log-transformed high-frequency heart rate variability comparisons among participants with posttraumatic stress disorder (PTSD; N=18) and a non-PTSD convenience sample cohort (N=46).

Variable	Participants with PTSD, mean (SD)		Participants without PTSD, mean (SD)
	T1a	T2b	T1
Age (years)	26.39 (4.23)	26.39 (4.23)	20.78 (3.64)c,d
BLe heart rate (bpmf)	86.43 (13.98)	84.95 (11.76)	76.45 (11.09)c,d
BL respiration	16.32 (4.09)	16.30 (4.48)	16.93 (2.72)
BL RMSSDg	30.89 (26.02)	30.14 (19.54)	49.04 (25.69)
BL LF:HFh	1.84 (1.30)	2.87 (4.08)	1.43 (2.01)

^aT1: time point 1 (baseline).

^bT2: time point 2 (postintervention).

^cSignificant difference (P<.05) between participants without posttraumatic stress disorder and participants with posttraumatic stress disorder at time point 1 (baseline).

^dSignificant difference (P<.05) between participants without posttraumatic stress disorder and participants with posttraumatic stress disorder at time point 2 (postintervention).

^eBL: baseline.

^fbpm: beats per minute.

^gRMSSD: root mean square of successive differences (between normal heartbeats).

^hLF:HF: low-frequency to high-frequency heart rate variability ratio.