highly significantP < 0.01
As for the predictive validity of the tool, highly significant correlations were found between the total PMQ score and the number of aberrant drug-related behaviors at 2-month ( r = 0.58; P < 0.01), 4-month ( r = 0.67; P < 0.01), and 6-month follow-ups ( r = 0.52; P < 0.01).