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  • Title: Latent trajectories of symptom change during cognitive-behavior therapy predict post-treatment worsening of symptoms: a preliminary examination among outpatients with bulimia-spectrum eating disorders.
    Author: Presseller EK, Lampe EW, Michael ML, Trainor C, Fan SC, Juarascio AS.
    Journal: Eat Weight Disord; 2022 Aug; 27(6):2257-2264. PubMed ID: 34981464.
    Abstract:
    PURPOSE: Up to 44% of individuals with bulimia nervosa (BN) experience worsening of symptoms after cognitive behavior therapy (CBT). Identifying risk for post-treatment worsening of symptoms using latent trajectories of change in eating disorder (ED) symptoms during treatment could allow for personalization of treatment to improve long-term outcomes METHODS: Participants (N = 56) with BN-spectrum EDs received 16 sessions of CBT and completed digital self-monitoring of eating episodes and ED behaviors. The Eating Disorder Examination was used to measured ED symptoms at post-treatment and 3-month follow-up. Latent growth mixture modeling of digital self-monitoring data identified latent growth classes. Kruskal-Wallis H tests examined effect of trajectory of change in ED symptoms on post-treatment to follow-up symptom change. RESULTS: Multi-class models of change in binge eating, compensatory behaviors, and regular eating improved fit over one-class models. Individuals with high frequency-rapid response in binge eating (H(1) = 10.68, p =0 .001, η2 = 0.24) had greater recurrence of compensatory behaviors compared to individuals with low frequency-static response. Individuals with static change in regular eating exhibited greater recurrence of binge eating than individuals with moderate response (H(1) = 8.99, p = 0.003, η2 = 0.20). CONCLUSION: Trajectories of change in ED symptoms predict post-treatment worsening of symptoms. Personalized treatment approaches should be evaluated among individuals at risk of poor long-term outcomes. LEVEL OF EVIDENCE: IV, evidence obtained from multiple time series. TRIAL REGISTRATION: ClinicalTrials.gov registration number NCT03673540, registration date: September 17, 2018.
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