The Appearance and Performance Enhancing supplement/substance use Scale (APES): Development and preliminary psychometric analysis

Background The use of both licit and illicit appearance and performance-enhancing drugs (APED) has been recognized as a key public health concern. While it is estimated that rates of APED usage in non-athlete populations is increasing, true prevalence studies are limited by a lack of psychometrically reliable and valid measures. This paper describes the development and psychometric evaluation of a survey tool for assessing APED usage. Method Initial items for the Appearance and Performance Enhancing Supplement/Substance Use Scale (APES) were seven licit and 13 illicit APED. Following a preliminary exploration, we evaluated the concurrent validity, internal consistency, and test-retest reliability of the APES in a community sample of 265 participants. Results The APES demonstrated strong internal consistency, medium to strong concurrent validity, and good to excellent test-retest reliability. Conclusions These results provide preliminary support for the reliability and the validity of APES scores in assessing both licit and illicit APED usage. Future studies are recommended to replicate and extend the psychometric investigations reported here to encompass additional validation studies and populations.