Reliability and validity of DSM-IV and DSM-5 methamphetamine use disorder diagnoses using the Chinese Version of the Semi-Structured Assessment for Drug Dependence and Alcoholism (SSADDA)

Background: The Semi-structured Assessment for Drug Dependence and Alcoholism (SSADDA) was developed to assess substance-use disorders and other psychiatric traits. We translated the SSADDA into Chinese and evaluated its inter-rater reliability and concurrent validity in diagnosing DSM-IV methamphetamine (MA) dependence and DSM-5 MA-use disorder (MUD). Methods: The sample comprised 231 participants who were interviewed using the Chinese SSADDA and the Mini International Neuropsychiatric Interview (Chinese MINI) for concurrent validation. Of the 231 participants, 191 were interviewed by two different interviewers two weeks apart. We evaluated the inter-rater reliability and concurrent validity of the diagnoses using percent agreement and Cohen's kappa coefficient (kappa). Cohen's linear weighted kappa was used to assess the reliability of DSM-5 MUD severity. Results: It showed good inter-rater reliability and no significant differences among the DSM-5 MUD (kappa = 0.71), DSM-IV MA abuse or dependence (kappa = 0.72), and the DSM-IV diagnoses of MA dependence (kappa = 0.66) and abuse (kappa = 0.68) tested separately. The weighted kappa was 0.67 across the three DSM-5 MUD severity levels. The reliability of each individual diagnostic criterion for DSM-5 MUD ranged from fair to excellent (kappa = 0.41-0.80), except for "repeated attempts to quit/control use" (kappa = 0.38). The concurrent validity based on MINI-derived diagnoses ranged from good to excellent (kappa = 0.65-0.78). Conclusions: This study shows that the Chinese version of SSADDA has good reliability and validity among Chinese MA users.