The Symptom-Checklist-K-9 (SCL-K-9) Discriminates between Overweight/Obese Patients with and without Significant Binge Eating Pathology: Psychometric Properties of an Italian Version

Nutrients. 2020 Mar 1;12(3):674. doi: 10.3390/nu12030674.


A general personality and psychopathology evaluation is considered to be crucial part of the multidisciplinary assessment for weight-related problems. The Symptom Checklist-90-Revised (SCL-90-R) is commonly used to assess general psychopathology in both overweight and obese patients seeking weight-loss treatment. The main purpose of the present research was to investigate the psychometric properties of the brief form of the SCL-90-R (i.e., the SCL-K-9) in a clinical sample (N = 397) of patients seeking weight-loss treatment (i.e., bariatric surgery and a nutritional weight-loss program). The results of the confirmatory factor analysis supported a one-factor solution of the SCL-K-9, with all nine items loading significantly on the common latent factor (lambdas ≥ 0.587). The ordinal α (= 0.91), the inter-item mean indices of correlation (rii = 0.53), and the convergent validity were also satisfactory. A receiver operating characteristic curves procedure showed that both SCL-90-R and SCL-K-9 were able to classify patients with and without significant binge eating pathology according to the Binge Eating Scale (BES) total score. Overall, our results suggest that the SCL-K-9 has adequate psychometric properties and can be applied as a short screening tool to assess general psychopathology in overweight/obese individuals seeking weight-loss treatment and at follow-up interviews when time restraints preclude the use of the full-length form.

Keywords: SCL-K-9; bariatric surgery candidates; binge eating; obesity; overweight; psychopathology.

Publication types

  • Multicenter Study
  • Observational Study
  • Validation Study

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Bariatric Surgery
  • Binge-Eating Disorder / complications
  • Binge-Eating Disorder / diagnosis*
  • Binge-Eating Disorder / psychology
  • Checklist / methods
  • Diagnosis, Differential
  • Female
  • Humans
  • Italy
  • Male
  • Mass Screening / methods*
  • Middle Aged
  • Obesity / diagnosis*
  • Obesity / etiology
  • Obesity / psychology
  • Obesity / therapy
  • Overweight / diagnosis*
  • Overweight / etiology
  • Overweight / psychology
  • Overweight / therapy
  • Preoperative Care / methods
  • Psychometrics / methods*
  • ROC Curve
  • Reproducibility of Results
  • Self Report
  • Weight Reduction Programs
  • Young Adult