title: [Comparative incidence of acute appendicitis in a mixed population, related to skin color].
abstract: BACKGROUND
  Acute appendicitis is a very common surgical emergency, but its etiology and pathology remain incompletely understood.
  
  
  OBJECTIVE
  To elucidate epidemiological aspects of acute appendicitis related to skin color, gender and age.
  
  
  METHODS
  Five-hundred patients operated on for acute appendicitis, and other 500 patients treated for different diseases and considered as a control group were studied at "Hospital das Clinicas", Federal University of Minas Gerais, Belo Horizonte, MG, Brazil. Gender, age and skin color were investigated. The results were compared by chi-square test.
  
  
  RESULTS
  There was no prevalence related to gender. A significant prevalence of white patients (73.8%) was verified in this series. The number of white men with appendicitis was significantly higher than white men in the control group. The incidence of black patients with appendicitis was significantly lower than black patients of the control group. The mean age was 23.2 years old for the white patients with appendicitis and 32.3 years old for the black patients.
  
  
  CONCLUSIONS
  The present paper shows an evident relation between appendicitis and white skin color.
authors.affiliation: Departamento de Cirurgia, Faculdade de Medicina, Universidade Federal de Minas Gerais. petroian@medicina.ufmg.br
authors.forename: Andy
authors.initials: A
authors.lastname: Petroianu
authors.forename: Jose Estevão de
authors.initials: JE
authors.lastname: Oliveira-Neto
authors.forename: Luiz Ronaldo
authors.initials: LR
authors.lastname: Alberti
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D001064:Appendicitis / Q000453:epidemiology* / Q000208:ethnology; D001938:Brazil / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D005006:Ethnicity; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D017678:Sex Distribution; D012880:Skin Pigmentation