Table 1

Demographic characteristics and clinical measures

	DPD		Control

Characteristic	n	Mean ± SD	n	Mean ± SD	2-tailed t test	p value
Age, yr	23	30.61 ± 7.31	23	29.96 ± 7.99	t₄₄ = 0.289	0.774
Handedness	23	0.76 ± 0.50	23	0.92 ± 0.15	t₄₄ = −1.542	0.135
CDS-30	22	148.14 ± 43.10	23	9.61 ± 12.04	t₄₃ = 14.543	< 0.001
CDS-State	23	926.96 ± 383.52	22	173.64 ± 254.40	t₄₃ = 7.796	< 0.001
DES	22	442.27 ± 217.95	23	36.09 ± 39.05	t₄₃ = 8.610	< 0.001
BDI-II	22	20.32 ± 11.27	23	2.48 ± 3.41	t₄₃ = 7.120	< 0.001
STAI-T	22	56.23 ± 11.80	23	34.00 ± 11.37	t₄₃ = 6.434	< 0.001
LSAS	22	442.27 ± 217.95	23	36.09 ± 39.05	t₄₃ = 3.738	0.001
TAS-20	22	55.59 ± 8.66	23	52.00 ± 7.07	t₄₃ = 5.785	< 0.001
ERQ	22	42.68 ± 8.98	23	39.52 ± 9.62	t₄₃ = 1.138	0.262
KIMS	22	86.68 ± 19.71	23	124.39 ± 13.43	t₄₃ = −7.531	< 0.001
DFS	22	70.36 ± 9.52	23	61.65 ± 9.24	t₄₃ = 3.119	0.003
CTQ_sum	22	52.32 ± 17.52	23	44.22 ± 10.33	t₄₃ = 1.878	0.069
CTQ_PA	22	6.36 ± 2.68	23	5.91 ± 1.91	t₄₃ = 0.652	0.518
CTQ_PN	22	5.50 ± 2.76	23	4.00 ± 1.54	t₄₃ = 2.241	0.032
CTQ_EA	22	11.00 ± 4.04	23	5.91 ± 1.91	t₄₃ = 1.765	0.086
CTQ_EN	22	6.91 ± 5.86	23	4.57 ± 5.27	t₄₃ = 1.411	0.165
CTQ_SA	22	6.45 ± 2.30	23	5.65 ± 1.72	t₄₃ = 1.119	0.269
TMT-A	21	24.62 ± 5.52	21	24.90 ± 6.80	t₄₀ = −0.150	0.882
TMT-B	21	51.38 ± 14.20	21	53.19 ± 18.59	t₄₀ = −0.355	0.725

BDI = Beck Depression Inventory; CDS = Cambridge Depersonalization Scale; CTQ = Childhood Trauma Questionnaire; DES = Dissociative Experiences Scale; DFS = Questionnaire for functional and dysfunctional self-focused attention; DPD = depersonalization/derealization disorder; EA = emotional abuse; EN = emotional neglect; ERQ = Emotion Regulation Questionnaire; KIMS = Kentucky Inventory of Mindfulness Skills; LSAS = Liebowitz Social Anxiety Scale; PA = physical abuse; PN = physical neglect; SA = sexual abuse; SD = standard deviation; STAI-T = State-Trait Anxiety Scale, trait version; TAS = Toronto Alexithymia Scale, TMT = Trail Making Test.