Interviews were conducted in a predetermined fixed order, consisting of the Demographics and Medical History sections of the Thai SSADDA, followed by the Thai MINI, Lifetime Version, and ending with the OD section of the Thai SSADDA. Interview assignments were balanced across the 11 interviewers, such that all potential interviewer pairs were used. Completed assessments were subjected to a strict quality assurance protocol in which: 1) interviews were first edited for completeness and accuracy by the primary nurse interviewers, 2) edited interviews were then cross-edited by an independent pair of trained interviewers, 3) cross-edited interviews were reviewed and a finalized interview produced by the primary interviewers, and 4) finalized interviews were submitted for quality assurance (QA) review by a trained, SSADDA-certified, Thai study physician (RK) who had no a priori knowledge of subjects or their diagnostic status (i.e., error checks were to confirm procedural accuracy in completion of the interview forms, not diagnostic accuracy). Upon completion of the QA review, interviews were scored using standard algorithms to determine the presence of a DSM-IV diagnosis of OD.
