title: An investigation of completion times on the Screener and Opioid Assessment for Patients with Pain - revised (SOAPP-R).
abstract: BACKGROUND
  Respondents' scores to the Screener and Opioid Assessment for Patients with Pain - revised (SOAPP-R) have been shown to be predictive of aberrant drug-related behavior (ADB). However, research is lacking on whether an individual's completion time (the amount of time that he/she takes to finish the screener) has utility in predicting ADB, despite the fact that response speed has been useful in predicting behavior in other fields. The purpose of this study was to evaluate the degree to which SOAPP-R completion time is predictive of ADB.
  
  
  METHODS
  This retrospective study analyzed completion-time data from 82 adult emergency department patients who completed the SOAPP-R on a tablet computer. The utility of SOAPP-R completion times in predicting ADB was assessed via logistic regression and the area under the curve (AUC) statistic. An external measure of ADB using Prescription Drug Monitoring Program data defined ADB to have occurred in individuals with at least four opioid prescriptions and at least four prescribers in 12 months.
  
  
  RESULTS
  Although there was a slight trend for individuals with greater completion times to have greater odds of ADB (odds ratio 1.004 in simple logistic regression), the association between SOAPP-R completion time and ADB was not statistically significant in either simple logistic regression (P=0.307) or multiple logistic regression adjusting for SOAPP-R score (P=0.419). AUC values for the prediction of ADB using completion time alone, SOAPP-R score alone, and both completion time and SOAPP-R score were 0.63, 0.64, and 0.65, respectively.
  
  
  CONCLUSIONS
  There was no significant evidence that SOAPP-R completion times were predictive of ADB among emergency department patients. However, the AUC value for completion times was only slightly less than that for SOAPP-R total scores.
authors.affiliation: Department of Public Health and Community Service, Tufts University School of Dental Medicine, Boston, MA, USA.
authors.forename: Matthew D
authors.initials: MD
authors.lastname: Finkelman
authors.affiliation: Craniofacial Pain and Headache Center, Tufts University School of Dental Medicine, Boston, MA, USA; Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital.
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: Kulich
authors.affiliation: Inflexxion Inc, Newton, MA, USA.
authors.forename: Stephen F
authors.initials: SF
authors.lastname: Butler
authors.affiliation: Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital.
authors.forename: William C
authors.initials: WC
authors.lastname: Jackson
authors.affiliation: Department of Emergency Medicine, Tufts Medical Center, Boston, MA, USA.
authors.forename: Franklin D
authors.initials: FD
authors.lastname: Friedman
authors.affiliation: Department of Methods and Statistics, Research Institute of Child Development and Education, University of Amsterdam, Amsterdam, the Netherlands.
authors.forename: Niels
authors.initials: N
authors.lastname: Smits
authors.affiliation: Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, USA.
authors.forename: Scott G
authors.initials: SG
authors.lastname: Weiner
keywords: aberrant drug-related behavior; chronic pain; response latency; response times; risk stratification; substance abuse