Table 6. ADHD symptoms (raw scores) at T1 and T2 for three clinical groups (means and SD).

Variable a)	TS-pure (n = 8)		TS group (n = 19)		ADHD-C (n = 33)
	T1	T2	T1	T2	T1	T2
Inattention b)	8.7 (7)	9.0 (5)	13.7 (6)	9.2 (5.2)	16.6 (5.8)	12.8 (7)
Hyperactivity b)	10.5 (8)	9.9 (7)	11.9 (7)	7.6 (6)	13.6 (6)	8.5 (7)
Total b)	19.2 (14)	16.6 (10)	25.6 (14)	15.9 (10)	29.9 (9.8)	21 (12)

^a) To assess disorder severity in the clinical groups, we provide results for symptoms of inattention and hyperactivity for the children with TS including those with comorbidities (i.e. TS group), the children with TS excluding those with comorbidities (i.e. TS-pure) and the children with ADHD-C.

^b) ADHD Rating Scale IV. Higher values indicate higher symptom load.