Table 2.

Follow-up analyses (N = 47)

Variable	Baseline		1-Week Post		3-Month F/U		6-Month F/U		Time F	d
	M	SE	M	SE	M	SE	M	SE
Nights/Week with NM	3.00	0.27	1.26	0.32	1.30	0.34	0.92	0.36	13.43***	1.16
NM per Week	3.33	0.38	2.81	0.45	1.45	0.49	1.36	0.52	4.81**	0.76
NM Severity	3.09	0.14	1.79	0.18	1.67	0.20	1.21	0.20	26.56***	2.00
Panic Sxs Upon Waking	5.47	0.43	4.39	0.51	4.05	0.60	4.22	0.64	2.34	0.45
PSQI Sleep Quality	12.45	0.76	7.60	0.84	7.65	0.87	7.45	0.90	25.17***	0.96
Hours of Sleep	5.94	0.23	6.93	0.26	6.90	0.27	6.78	0.29	8.11***	0.57
Fearful of Sleep	1.51	0.14	0.68	0.16	0.48	0.17	0.41	0.18	14.85***	1.26
Health Symptoms	74.84	4.85	64.78	5.23	63.06	5.35	59.53	5.47	6.29**	0.48
TSI – Depression	11.04	0.89	8.70	1.00	7.71	1.07	7.47	1.15	4.78**	0.52
TSI – Anger/Irritability	12.84	0.89	8.74	1.02	8.90	1.10	7.93	1.19	8.39***	0.83
TSI – Dissociation	9.76	0.80	7.25	0.88	6.98	0.92	6.36	0.96	8.57***	0.72
TSI – Tension Reduction	5.44	0.52	3.00	0.62	3.64	0.64	2.79	0.67	7.83***	0.88
CAPS Past Month	55.68	3.95	41.39	4.34	26.92	4.61	24.93	4.92	17.41***	1.18

^*p < 0.05.

^**p < 0.01.

^***p < 0.001.

Effect sizes calculated for baseline to 6-month differences. According to Cohen (1988), d = 0.20 is a small effect, d = 0.50 is a medium effect, d = 0.80 is a large effect.

NM, nightmare; Sxs, Symptoms; CAPS, Clinician Administered PTSD Scale; TSI, Trauma Symptom Inventory; PSQI, Pittsburgh Sleep Quality Index.