ArticlePsychiatry research2026
Disorganized attachment and identity dissociation: FKBP5 CATT as a molecular moderator.
Article in Psychiatry research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundChildhood maltreatment and FKBP5 CATT haplotypes increase identity dissociation risk. While maltreatment often fosters disorganized attachment, the specific role of the FKBP5 CATT haplotype within this developmental pathway remains unknown.
methodsIn 310 trauma-exposed adults, we assessed childhood maltreatment, disorganized attachment, and identity dissociation. FKBP5 CATT haplotype status was dichotomized (present/absent). Regression models were estimated to examine the pathway Childhood Maltreatment → Disorganized Attachment → Identity Dissociation, comparing two competing hypotheses: 1) The Formation Hypothesis (Maltreatment × CATT → Disorganization), and 2) The Translation Hypothesis (Disorganization × CATT → Identity Dissociation). Model fit was compared using BIC, and simple slopes were examined.
resultsDisorganized attachment predicted identity dissociation (β = 0.143, z = 3.83, p < .001), and childhood maltreatment predicted disorganization (β = 0.007, z = 4.46, p < .001). The Formation hypothesis was not supported, as the Maltreatment × CATT interaction did not predict disorganization (β = -0.004, z = -1.18, p = .24). However, the Translation hypothesis was supported by three pieces of evidence: a significant Disorganization × CATT interaction predicting identity dissociation (β = 0.133, z = 2.22, p = .027), model fit (∆BIC = 265.3), and simple slopes showing a strong effect of disorganization on identity dissociation for CATT carriers (β = 0.15, p < .001; +16.5 % per unit) but not for non-carriers (β = 0.02, p = .65).
conclusionsThe FKBP5 CATT haplotype does not promote disorganized attachment but amplifies the translation of disorganized attachment into identity dissociation. This result highlights a genetically influenced failure of identity development following disorganized attachment.
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