الفهرس 
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Abstract
Acne vulgaris is the most common dermatological condition affecting adolescents and causing a considerable impact on their quality of life.
It was to determine the prevalence of acne vulgaris and its impact on the quality of life, also the study aimed to assess the knowledge about acne among adolescents attending secondary schools in New Minia city, Minia governorate, Egypt.
This was a cross-sectional study carried out in all governmental and technical secondary schools in New Minia city, Minia governorate, Egypt. Approval was taken from the ethical committee of Minia Faculty of Medicine and also from Ministry of Education. Every student with acne was subjected to full medical history taking and local examination of head and neck to assess the severity of acne vulgaris.
Assessment of the impact of acne vulgaris on their quality of life was carried out using self-reported questionnaire, the Children’s Dermatology Life Quality Index (CDLQI).
Assessment of knowledge about acne was conducted by self-reported questionnaire.
This study was carried out on 1034 secondary school students, The age ranged from14 to 19 years old, with a mean ±SD of 16.3±1, Sex distribution of all students was 54.4% males and 45.6% females, The overall prevalence of acne was 479 with percentage of 46.3%, where affected males were 240 (42.4%) and affected females were 239 (50.9%), being more common in females.
Degree of severity of acne was mild in 74.1%, moderate in 20.3%, severe in 4.2%, and very severe in 1.5%, being more severe in males.
The degree of impact on quality of life was significantly related to the disease grade, the students with severe and very severe acne showed higher CDLQI scores.