LAUSR

Highlights • A discriminant analysis model of psychosocial factors was devised to differentiate between PIU and CUD.• Compared to the control group, the PIU group had higher scores on motor, attentional and non-planning impulsiveness; tolerance of frustration, emotional pain, and ambiguity; negative and positive metacognitions, need to control thoughts, and cognitive confidence; and RNT.• Compared to the control group, the CUD group had lower scores on family and significant other support; and had higher scores on motor and non-planning impulsiveness; tolerance of frustration, emotional pain, and ambiguity; suppression; need to control thoughts; and RNT.• Social support, tolerance of physical discomfort, reappraisal, and cognitive confidence play a significant role in discriminating PIU and CUD.• The classification analysis results showed that 68.8% of the control group, 70.8% of the PIU group, and 81.3% of the CUD group were correctly classified in their respective groups based on the predictor variables.