Table 3.

Improvement Rate According to the Ages at Initial Visit (Group I∼IV).

			No of Patients	Severity at Initial Visit	Severity at End of 2019	Improvement Rate	Average Follow up years
Group I (5-8 y)	Simple Tics		52	3.19	2.19	−31.30%	1.88
	ComplexTics		55	3.95	2.64	−33.20%	1.93
		Total	107	3.58	2.42	−32.40%	1.91
Group II (9-12 y)	Simple Tics		65	2.92	1.95	−33.20%	1.91
	ComplexTics		70	3.46	2.59	−25.20%	2.2
		Total	135	3.2	2.28	−28.70%	2.06
Group III (13-15 y)	Simple Tics		22	3.7	2.7	−27.00%	2
	ComplexTics		20	3.8	2.7	−28.90%	2.1
		Total	42	3.48	2.38	−31.50%	2.02
Group IV (16-18 y)	Simple Tics		7	3	1.86	−38.10%	1.57
	ComplexTics		12	3.83	2.75	−28.30%	1.83
		Total	19	3.53	2.42	−31.30%	1.74