Early Treatment of Nevus of Ota in Children is More Effective and Beneficial to Mental Health: Observation on the Efficacy of Q-Switched Ruby Laser in Treating 159 Cases of Nevus of Ota in Children

Figures & data

Table 1 Clinical Characteristics of Pediatric Patients with Nevus of Ota in the School-Age and Preschool Groups

Features	School-Age Group	Preschool Group
Sex
Male	25	17
Female	61	56
Total	86	73
Tanino’s classification
I	39	32
II	35	30
III	12	11
IV	0	0
Average age	3.2	10.3

Table 2 Significant Efficacy Rates and Average Number of Treatments for Nevus of Ota in Children

	Significant Efficacy		Average Number of Treatments
	III + IV	Rate
Age Groups
Preschool group	44	93.1%	3.6
School-age group	48	90.1%	5.1

Notes: The chi-square test for the significant efficacy rate of the two groups showed P>0.05. The t-test for the number of treatments in the two groups showed P<0.05.

Figure 1 Nevus of Ota in Children Before and After Treatment. (a) 7-month-old child with type I nevus of Ota, before treatment. (b) 7-month-old child with type I nevus of Ota after 2 treatments. (c) 6-month-old child with type III nevus of Ota, before treatment. (d) 6-month-old child with type III nevus of Ota after 3 treatments. (e) 12-years-old child with typeIInevus of Ota, before treatment. (f) 12-years-old child with typeIInevus of Ota after 4 treatments. (g) 14-years-old child with type III nevus of Ota, before treatment. (h) 14-years-old child with type III nevus of Ota after 4 treatments.

Table 3 CDI Scores of Children with Nevus of Ota Before and After Treatment

	Average CDI Score		CDI≥19
	Pre-Treatment	After Treatment	Pre-Treatment	After Treatment
Age Groups
Preschool group	–	10.8	–	3 (9.7%)
School-age group	17.3	13.6	18 (24.6%)	11 (15.1%)

Notes: The average CDI scores and the percentage of CDI≥19 individuals in the school-age children group were significantly lower after treatment than before treatment (p<0.05).