{'fraction_non_alphanumeric': 0.02437106918238994, 'fraction_numerical': 0.00550314465408805, 'mean_word_length': 5.6103896103896105, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Factor structure of the 19-item Comprehensive Psychopathological Rating Scale Self-rating Scale for Affective Syndromes in a Swedish nationwide clinical sample of eating disorder patients

Objective: Individuals with eating disorders have anxiety and depression symptoms. To study these comorbidities, we need high-quality self-report measures appropriate for patients and population samples covering a wide range of symptoms. One potential tool is the 19-item self-rated version of the Comprehensive Psychopathological Rating Scale for Affective Syndromes (CPRS-S-A), but its factor structure has not been validated in eating disorder patients. We investigated its factor structure and tested if the derived subscales are invariant across eating disorders and if eating disorder patients differ on these scales. Method: The sample comprises patients registered by 45 treatment units in the nationwide Stepwise quality assurance database for specialised eating disorder care in Sweden (n = 9,509). Patients self-reported their anxiety and depression symptoms using the CPRS-S-A. Analyses included an exploratory factor analysis in a split sample, a confirmatory factor analysis on a hold-out sample, and invariance testing. We examined differences in subscales across different eating disorders. Results: Results suggested a four-factor solution with the subscales: Depression, Somatic & fear symptoms, Disinterest, and Worry. Further multigroup confirmatory factor analysis indicated that the factor structure of the subscales held across the different eating disorders. Patients with anorexia nervosa binge-eating/purging subtype scored the highest and patients with unspecified feeding and eating disorders the lowest on all subscales. Additionally, we detected factor-specific differences amongst eating disorders. Discussion: In summary, our four-factor solution of the CPRS-S-A is suitable for patients with different eating disorders and may help to identify differences in anxiety and depression domains amongst eating disorders. Public Significance Statement: Patients with eating disorders often have anxiety and depression symptoms that impact treatment and recovery. Therefore, we need questionnaires that measure these symptoms so we can study them. More than 9,000 Swedish patients with eating disorders answered an anxiety and depression questionnaire. We tested if the questionnaire is suitable for patients with eating disorders. We could group questions resulting in a fine-tuned tool to study anxiety and depression symptoms.