title: Comparison between PEF values obtained from a population sample in the city of São Carlos, Brazil, and reference values.
abstract: OBJECTIVE
  To compare the reference values for PEF suggested by other authors in 1963, 1989 and 2001 (for populations in the USA, England and Cuba, respectively) with those obtained from a population sample in the city of São Carlos, Brazil, and to determine whether there is concordance among them.
  
  
  METHODS
  A total of 243 volunteers (123 females and 120 males; 20-70 years of age) participated in the study. The PEF measurements were performed with the volunteer standing, using a nose clip, by means of a portable peak flow meter. These measurements were compared with the reference values using the Friedman test and Dunn's post-hoc test (p < 0.05).
  
  
  RESULTS
  Significant differences were found in all age groups from both genders regarding the values predicted in 1989; the same occurred in the 20-30 and 31-40 age groups (both genders), as well as in the 61-70 age group (females only), regarding those predicted in 2001, as well as in the 20-30 age group (males only) regarding those predicted in 1963.
  
  
  CONCLUSIONS
  The values predicted in 1963 are appropriate for a population of individuals with the same characteristics as the study sample, except for males in the 20-30 age group. Our study is relevant due to the fact that our sample was larger than that evaluated in the 1963 study. The majority of the values predicted in 1989 and 2001 overestimated the PFE values obtained in our study, proving to be inappropriate for the population studied.
authors.affiliation: Departamento de Fisioterapia, Universidade Estadual de Campinas, Campinas, SP, Brasil. cilsodias@gmail.com
authors.forename: Cilso Dias
authors.initials: CD
authors.lastname: Paes
authors.forename: Bruna Varanda
authors.initials: BV
authors.lastname: Pessoa
authors.forename: Maurício
authors.initials: M
authors.lastname: Jamami
authors.forename: Valéria Amorim Pires
authors.initials: VA
authors.lastname: Di Lorenzo
authors.forename: Kamilla Tays
authors.initials: KT
authors.lastname: Marrara
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001938:Brazil; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010366:Peak Expiratory Flow Rate; D011237:Predictive Value of Tests; D012016:Reference Values; D012129:Respiratory Function Tests / Q000379:methods / Q000592:standards; D012140:Respiratory Tract Diseases / Q000175:diagnosis*; D013147:Spirometry; D055815:Young Adult