METHODS: This cross-sectional study was conducted between July 1st and July 31, 2023. A total of 114 participants, comprising 76 MAT patients and 38 healthy subjects (controls), were recruited. Sociodemographic questionnaire, DSM-5 and neuropsychiatric cognitive (NUCOG) assessments were used. A general linear model was used to examine cognitive function between the MMT and control groups while controlling for all possible confounders.