Comparação de valores de PFE em uma amostra da população da cidade de São Carlos, São Paulo, com valores de referência / Comparison between PEF values obtained from a population sample in the city of São Carlos, Brazil, and reference values

OBJETIVO: Comparar os valores de referência para PFE sugeridos por outros autores em 1963, 1989 e 2001 (para populações nos EUA, na Inglaterra e em Cuba, respectivamente) com os valores de PFE coletados de uma amostra da população da cidade de São Carlos (SP), verificando se há concordância entre estes. MÉTODOS: Participaram do estudo 243 indivíduos (123 mulheres; 120 homens) na faixa etária entre 20 e 70 anos. A coleta de PFE foi realizada com o indivíduo em pé, utilizando um clipe nasal, através de medidor de PFE portátil. Os valores obtidos foram comparados com os previstos, utilizando-se o teste de Friedman e post hoc de Dunn (p < 0,05). RESULTADOS: Observou-se diferença significativa para todas as faixas etárias, em ambos os sexos, quanto aos valores previstos em 1989; o mesmo ocorreu para as faixas etárias 20-30, 31-40 anos, em ambos os sexos, e 61-70 anos para mulheres quanto aos valores de 2001, assim como para a faixa etária 20-30 anos para homens quanto aos valores previstos em 1963. CONCLUSÕES: Os valores previstos em 1963 são aceitáveis para uma população de indivíduos com as mesmas características da amostra estudada, exceto para os homens de 20-30 anos. Nosso estudo provou ter grande relevância devido ao tamanho da amostra estudada quando comparado ao do trabalho realizado em 1963. A maioria dos valores previstos em 1989 e 2001 superestimou os valores de PFE obtidos nesse estudo, indicando sua inadequação para a população estudada.

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.

Relationship of BODE Index to functional tests in chronic obstructive pulmonary disease

OBJECTIVE: To determine if there is a correlation between the BODE Index and variables assessed during the Activities of Daily Living assessment, performance on lower limber tests, and peripheral muscle impairment of the upper limb in patients with chronic obstructive pulmonary disease. MATERIALS AND METHODS: Ten men (aged 58 to 80 years old) with moderate to very severe obstruction were evaluated and classified by the BODE Index. They were evaluated by pulmonary ventilation (V•E), oxygen consumption (V•O2), and carbonic gas production (V•CO2) on the ADL assessment; Distance Walking (DW) in the Six Minute Walking Test (6MWT) and the Six Minute Walking Test on Treadmill (6MWTT); number of repetitions in the Sit-to-Stand Test; and the Hand Grip Strength Test. Correlations were evaluated between the classification and the tests performed (Pearson and Spearman test, p<0.05). RESULTS: The mean of the total score for the BODE Index was 2.80 (±1.03), with three patients scoring in the first quartile (Q1) and seven scoring in the second quartile (Q2). This Index showed a negative correlation with the 6MWTT (r=-0.86), the Sit-to-Stand Test (r=-0.66), and the Hand Grip Strength Test (r=-0.83). CONCLUSIONS: Our results show that there is no correlation between the BODE Index and the ventilatory and metabolic responses in the Activities of Daily Living assessment. On the other hand, a correlation was observed between the BODE Index and the variables assessed in the 6MWTT, Sit-to-Stand Test, and Hand Grip Strength Test in moderate to very severe Chronic Obstructive Pulmonary Disease patients. This suggests that these tests can be employed as predictors of physical exercise capacity, perhaps as complementary tests to the BODE Index.