Table 2.

ANCOVA results for each inhibition variable, control participants versus those with tic disorders, with age as covariate; and for control participants versus those with tic disorders, groups are split into two (those without ADHD and those with ADHD), with age as covariate, and planned contrasts comparing each of the two patient groups to the control group.

Inhibition variables	Controls (adjusted mean and 95% CI)	Tics-without-ADHD	p value versus controls	Tics-plus-ADHD	p value versus controls	Between-groups F-stat and p value	Post hoc comparisons between patient groups (mean difference and 95% CI for difference)
Distractor hits	15.61% (14.28, 16.95)	22.71% (19.81, 25.61)	<0.0001	23.56% (20.66, 26.46)	<0.0001	F = 18.513; p < 0.0001	-0.085; -5.87, 4.17; p = 0.99
Distractor proportion	11.31% (10.48, 12.15)	15.99% (14.17, 17.81)	<0.0001	16.49% (14.68, 18.31)	<0.0001	F = 20.339; p < 0.0001	-0.50; -3.65, 2.64; p = 0.99
Object processing rate	1.97 (1.93, 2.00)	1.87 (1.79, 1.95)	0.032	1.83 (1.75, 1.91)	0.002	F = 6.202; p = 0.002	-0.05; -0.18, 0.10; p = 0.99