The Walid-Robinson Opioid-Dependence (WROD) Questionnaire
A questionnaire designed based on the WHO and DSM-IV-TR clinical guidelines for a definite diagnosis of “dependence” that require three or more of six characteristic features being experienced or exhibited:
(1) Do you desire to continue taking your opioid medication?
(2) Do you now experience lengthy periods of use or binge patterns of use?
(3) Do you have tremors and use substances to relieve withdrawal symptoms?
(4) Are you able to take more drug without easing the pain?
(5) Do you neglect food, hygiene or health care?
(6) Are you willing to continue use the drug despite knowledge of problems caused, or exacerbated by it?
Walid MS, Hyer LA, Ajjan M, Barth ACM, Robinson JS. Prevalence of opioid-dependence in spine surgery patients and correlation with length of stay. J Opioid Management 2007, Volume 3, Number 3. 
Walid MS, Hyer LA, Ajjan M, Robinson JS: Predicting Opioid-Dependence Using Pain Intensity and Length of Pain Suffering in Pre-Spine-Surgery Patients. The Internet J Pain, Symptom Control and Palliative Care. 2007; Volume 5, Number 2.