Table 1.

Pre-treatment Sample Characteristics

	Total Sample (N = 24)	LWT Group (N = 12)	Waitlist (N = 12)
	N (%)	N (%)	N (%)	χ2	p
Male	18 (75%)	7 (58%)	11 (92%)	Fisher's exact	0.16
On a tic medicationa	13 (54%)	6 (50%)	7 (58%)	0.17	0.68
Comorbid Diagnosesb
ADHD	10 (42%)	4 (33%)	6 (50%)	0.69	0.41
OCD	9 (38%)	4 (33%)	5 (42%)	Fisher's exact	1.00
Non-OCD Anxiety Disorderc	17 (71%)	8 (67%)	9 (75%)	Fisher's exact	1.00
Depressive Disorder	3 (13%)	1 (8%)	2 (17%)	Fisher's exact	1.00
Disruptive Behavior Disorder	5 (21%)	4 (33%)	1 (8%)	Fisher's exact	0.32
	Mean (SD)	Mean (SD)	Mean (SD)	t	p
Age	11.34 (2.68)	11.71 (2.80)	10.97 (2.61)	0.66	0.51
Tic Symptom Severity
CGI-Tic Severity	3.17 (0.82)	3.00 (0.60)	3.33 (0.98)	−1.00	0.33
YGTSS Total Tic Score	22.42 (7.80)	20.17 (8.81)	24.67 (6.21)	−1.45	0.16
Tic Impairment
YGTSS Impairment Score	29.58 (7.51)	27.50 (7.54)	31.37 (7.18)	−1.39	0.18
CTIM-P Tic Impairment Score	21.23 (18.03)	18.38 (15.13)	24.09 (20.81)	−0.77	0.45
Co-Occurring Symptom Severity
CY-BOCS Total Score	11.17 (7.39)	11.25 (8.16)	11.08 (6.91)	0.05	0.96
MASC Total Score T-Scored	44.17 (9.57)	41.27 (8.79)	46.83 (9.84)	−1.42	0.17
Quality of Life
PedsQL Total Score	76.68 (15.76)	73.91 (14.90)	79.44 (16.76)	−0.85	0.40

Note: ADHD = Attention Deficit Hyperactivity Disorder, OCD = Obsessive Compulsive Disorder, YGTSS = Yale Global Tic Severity Scale, CTIM-P = Child Tourette Impairment Scale-Parent report, CY-BOCS = Children's Yale-Brown Obsessive Compulsive Scale, MASC = Multidimensional Anxiety Scale for Children, PedsQL = Pediatric Quality of Life Inventory,

^aTic influencing medications included antipsychotics and alpha-2 agonists

^bSome youth had more than one comorbid diagnosis

^cDoes not include specific phobias

^dMissing one form for patients.