Association between baseline dissociation levels and stress-induced state dissociation in patients with posttraumatic-stress disorder, borderline personality disorder, and major depressive disorder

Table 1. Participant Characteristics in Patients with BPD and/or PTSD (n = 65), Patients with MDD (n = 84), and Non-Clinical Controls (n = 41)

Variable (M/SD)	BPD/PTSD Patients	MDD Patients	Non-Clinical Controls	Test statistic	Effect size
Age	31.88 (8.80)	34.99 (11.22)	32.20 (9.19)	F(2, 190) = 2.12, p = .123	η² = 0.02, 90% CI [0, 0.06]
Years of school education	11.43 (1.78)	11.41(1.47)	11.70 (1.42)	F(2, 186) = 0.55, p = .577	η² = 0.01, 90% CI [0, 0.03]
Baseline dissociation (DSS-7)	28.43 (17.80)	13.78 (13.15)	2.94 (4.40)	F(2, 186) = 45.78, p < .001	η² = 0.33, 90% CI [0.24, 0.41]
Childhood maltreatment (CTQ)	68.21 (19.10)	50.07 (16.40)	32.85 (7.81)	F(2, 187) = 62.66, p < .001	η² = 0.40, 90% CI [0.31, 0.47]
Depressive symptom severity (BDI-II)	27.30 (10.23)	22.06 (10.83)	2.61 (2.79)	F(2, 175) = 90.42, p < .001	η² = 0.51, 90% CI [0.42, 0.57]

Note. We report sum scores for all questionnaires. BPD borderline personality disorder, PTSD posttraumatic-stress disorder, MDD major depressive disorder, M mean, SD standard deviation, η² eta squared (effect size), DSS-7 Dissociation Tension Scale (past week), CTQ Childhood Trauma Questionnaire, BDI-II Beck Depression Inventory, Post-hoc t-test results: baseline dissociation: BPD/PTSD > MDD: t(146) = 5.76, p < .001, BPD/ PTSD > NCC: t(103) = 8.98, p < .001, MDD > NCC: t(123) = -5.13, p < .001; childhood maltreatment: BPD/PTSD > MDD: t(144) = 6.02, p < .001, BPD/PTSD > NCC: t(106) = 11.15, p < .001, MDD > NCC: t(124) = -6.58, p < .001; depressive symptom severity: BPD/PTSD > MDD: t(135) = 2.88, p = .005, BPD/ PTSD > NCC: t(100) = 15.06, p < .001, MDD > NCC, t(115) = -11.28, p < .001

ISSN: 2051-6673