Patients with scars

 n = 124

Patients without scars

 n = 23

p value

Current age in years, mean (SD)

25.6 (4.78)

17.8 (1.48)

< 0.001

Age at onset in years, mean (SD)

16.5 (1.63)

16.3 (1.29)

0.148

Age at initial treatment in years, mean (SD)

19.9 (1.89)

16.9 (1.31)

< 0.001