title: Clinical manifestation and associated factors of seborrheic dermatitis in Korea.
abstract: Systematic investigations of clinical manifestation and factors associated with the severity of seborrheic dermatitis (SD) have rarely been reported in Asia. We investigated the clinical manifestation and associated factors of SD. Patients were asked to fill a self-questionnaire including symptom severity and aggravating factors. We evaluated objective severity and involved sites of SD. Patients were categorized into three groups; young age group (age <30), middle age group (30≤ age <60), and old age group (age ≥60) and we compared clinical features among them.
  
  
  RESULTS
  Among 253 patients included, scalp was the most frequently involved site and the most frequently reported aggravating factor was psychological stress. Different age groups have distinct clinical features and severity. Severity of SD decreased with age and patients in the old age group had less frequent involvement of the lower face. Risk factors of scalp involvement were male gender, disease duration ≥7 years and a history of acne. We investigated associated factors of SD and observed different clinical features between the age groups. We suggest that the adult form of SD can be categorized into three groups; young age SD, middle age SD and old age SD.
authors.affiliation: Department of Dermatology, Seoul National University College of Medicine,, Acne and Rosacea Research Laboratory, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 110-744, South Korea.
authors.forename: Seon Yong
authors.initials: SY
authors.lastname: Park
authors.affiliation: Department of Dermatology, Seoul National University College of Medicine,, Acne and Rosacea Research Laboratory, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 110-744, South Korea.
authors.forename: Hyuck Hoon
authors.initials: HH
authors.lastname: Kwon
authors.affiliation: Department of Dermatology, Seoul National University College of Medicine,, Acne and Rosacea Research Laboratory, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 110-744, South Korea.
authors.forename: Seonguk
authors.initials: S
authors.lastname: Min
authors.affiliation: Acne and Rosacea Research Laboratory, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 110-744, South Korea.
authors.forename: Ji Young
authors.initials: JY
authors.lastname: Yoon
authors.affiliation: Department of Dermatology, Seoul National University College of Medicine,, Acne and Rosacea Research Laboratory, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 110-744, South Korea.
authors.forename: Dae Hun
authors.initials: DH
authors.lastname: Suh
mesh_terms: D000152:Acne Vulgaris / Q000453:epidemiology; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D015897:Comorbidity; D012628:Dermatitis, Seborrheic / Q000453:epidemiology* / Q000209:etiology; D005148:Facial Dermatoses / Q000453:epidemiology* / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D056910:Republic of Korea / Q000453:epidemiology; D012307:Risk Factors; D012536:Scalp Dermatoses / Q000453:epidemiology* / Q000209:etiology; D012720:Severity of Illness Index; D012737:Sex Factors; D013315:Stress, Psychological / Q000150:complications; D011795:Surveys and Questionnaires; D013997:Time Factors; D055815:Young Adult
keywords: Korea; clinical manifestation; risk factors; seborrheic dermatitis; severity