Pityriasis alb and

Vitiligo (group C)

Vitiligo (group B)

Pityriasis alba (group A)

Demographic data

12

28

38

Numberof patients

9 (75%)

3 (25%)

16 (57.14%)

12 (42.86%)

33 (86.89%)

5 (13.16%)

Male Female

8.33 ± 2.78 years

15.46 ± 12.50 years

8. 68 ± 5.94 Years

Age (mean ± SD)

In PA

3 (25%)

6 (50%)

3 (25%)

In vitiligo

<1 year 9 (75%)

1 - 5 years 3 (25%)

14 (50%)

10 (35.71%)

4 (14.29%)

20 (52.89%)

17 (44.74%)

1 (2.63%)

Duration of disease

Less than 1 year

1 - 5 years

More than 5 years

5 (41.67%)

1 (3.57%)

19 (50%)

Family history of atopy

7 (58.33%)

11 (39.29 %)

17 (44.74%)

Family history of vitiligo

5 (41.67%)

8 (28.57%)

3 (7.89%)

Family history of other autoimmune disease

5 (41.66%)

6 (21.43%)

14 (36.84%)

Personal history of atopy

6 (50%)

11 (39.28%)

2 (5.26%)

Koebner’s phenomenon