Ascertaining an efficient eligibility cut-off for extended Medicare items for eating disorders

Tracey Wade, Jamie Lee Pennesi, Yuan Zhou

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: Currently eligibility for expanded Medicare items for eating disorders (excluding anorexia nervosa) require a score ⩾ 3 on the 22-item Eating Disorder Examination-Questionnaire (EDE-Q). We compared these EDE-Q “cases” with continuous scores on a validated 7-item version of the EDE-Q (EDE-Q7) to identify an EDE-Q7 cut-off commensurate to 3 on the EDE-Q. Methods: We utilised EDE-Q scores of female university students (N = 337) at risk of developing an eating disorder. We used a receiver operating characteristic (ROC) curve to assess the relationship between the true-positive rate (sensitivity) and the false-positive rate (1-specificity) of cases ⩾ 3. Results: The area under the curve showed outstanding discrimination of 0.94 (95% CI:.92–.97). We examined two specific cut-off points on the EDE-Q7, which included 100% and 87% of true cases, respectively. Conclusion: Given the EDE-Q cut-off for Medicare is used in conjunction with other criteria, we suggest using the more permissive EDE-Q7 cut-off (⩾2.5) to replace use of the EDE-Q cut-off (⩾3) in eligibility assessments.

Original languageEnglish
Number of pages4
JournalAustralasian Psychiatry
Early online date15 Jul 2021
DOIs
Publication statusE-pub ahead of print - 15 Jul 2021

Keywords

  • Eating Disorder Examination Questionnaire
  • eating disorders
  • Medicare
  • receiver operating characteristic curve
  • sensitivity

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