Questionnaire Number (QN)

Variable

Yes

No

Total

P value Χ² test

2

Presence of acne on the back

54

97

151

<0.001

3

Presence of acne on the chest

33

118

151

<0.001

5

Visiting a dermatologist regarding acne

62

89

151

0.028

6

Getting acne treatment without a prescription

54

97

151

<0.001

9

Acne presence in parents

62

89

151

0.028

10

Acne presence in siblings

126

25

151

<0.001

11

Presence of scars

92

59

151

0.007

12

Presence of post inflammatory hyperpigmentation

110

41

151

<0.001