Table 3

Hierarchical regressions comprising a covariate model followed by cannabis involvement variables (urinary tetrahydrocannabinol, lifetime cannabis use, cannabis use disorder) in relation to neuropsychological performance

Neuropsychological variable	Covariate model R²	p value	Cannabis involvement ΔR²	p value
Penn Word Memory Test	0.050	< 0.001^*	0.003	0.392
Flanker Inhibitory Control and Attention Test	0.024	< 0.001^*	0.010	0.011
Dimensional Change Card Sort Test	0.032	< 0.001^*	0.003	0.337
Short Penn Continuous Performance Test	0.049	< 0.001^*	0.008	0.029
Raven’s Progressive Matrices	0.142	< 0.001^*	0.010	0.003^*
Delay discounting task	0.063	< 0.001^*	0.003	0.272
Picture Sequence Memory Test	0.070	< 0.001^*	0.010	0.004^*
Pattern Comparison Processing Speed Test	0.026	< 0.001^*	0.015	0.001^*
List Sorting Working Memory Test	0.067	< 0.001^*	0.006	0.060
9-Hole Pegboard Dexterity Test	0.104	< 0.001^*	0.005	0.097

↵* Significant at the p < 0.005 level.