Maximizing remission from cognitive-behavioral therapy in medicated adults with obsessive-compulsive disorder

Behav Res Ther. 2021 Aug:143:103890. doi: 10.1016/j.brat.2021.103890. Epub 2021 May 29.

Abstract

Practice guidelines for adults with obsessive-compulsive disorder (OCD) recommend augmenting serotonin reuptake inhibitors (SRIs) with exposure and ritual prevention (EX/RP). However, fewer than half of patients remit after a standard 17-session EX/RP course. We studied whether extending the course increased overall remission rates and which patient factors predicted remission. Participants were 137 adults with clinically significant OCD (Yale-Brown Obsessive Compulsive Scale [Y-BOCS] score ≥18) despite an adequate SRI trial (≥12 weeks). Continuing their SRI, patients received 17 sessions of twice-weekly EX/RP (standard course). Patients who did not remit (Y-BOCS ≤12) received up to 8 additional sessions (extended course). Of 137 entrants, 123 completed treatment: 49 (35.8%) remitted with the standard course and another 46 (33.6%) with the extended course. Poorer patient homework adherence, more Obsessive-Compulsive Personality Disorder (OCPD) traits, and the Brain-Derived Neurotrophic Factor (BDNF) Val66MET genotype were associated with lower odds of standard course remission. Only homework adherence differentiated non-remitters from extended course remitters. Extending the EX/RP course from 17 to 25 sessions enabled many (69.3%) OCD patients on SRIs to achieve remission. Although behavioral (patient homework adherence), psychological (OCPD traits), and biological (BDNF genotype) factors influenced odds of EX/RP remission, homework adherence was the most potent patient factor overall.

Keywords: CBT; Cognitive-behavioral therapy; EX/RP; Exposure and ritual prevention; OCD; Obsessive-compulsive disorder.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Adult
  • Cognitive Behavioral Therapy*
  • Combined Modality Therapy
  • Humans
  • Obsessive-Compulsive Disorder* / therapy
  • Patient Compliance
  • Selective Serotonin Reuptake Inhibitors / therapeutic use
  • Treatment Outcome

Substances

  • Serotonin Uptake Inhibitors