Comparação entre os valores teóricos para alguns dados espirométricos em crianças determinados pelas equações de Mallozi e de Polgar

Abstract

Objetivo: O presente trabalho dá prosseguimento ao estudo da validade de equações para valores teóricos (VT) para cálculos espirométricos na população brasileira. Foi feita a comparação entre as equações propostas por Mallozzi (VT-M) para população brasileira e as de Polgar (VT-P), utilizadas especialmente na Europa e Estados Unidos. Métodos: Foram analisados os VT medidos em 185 pacientes de ambos os sexos, com idade entre 6 e 17 anos, sendo 89 meninos e 96 meninas. Para cada paciente foi feito o cálculo do VT para CVF, VEF 1 e FEF 25-75 segundo as equações de Mallozi VT-M e de Polgar VT-P. Em seguida foram comparados os laudos obtidos por um e por outro, segundo o Consenso de Espirometria da SBPT. Resultados: O VT-M para CVF é 0,38% maior para os meninos e 2,19% para as meninas que o calculado segundo Polgar. Os VT-P para o VEF 1 são 6,67% (p < 0,05) menores para as meninas e 7,26% para os meninos. Para o FEF 25-75 os valores diferem apenas em 0,35 e 0,43% para cada um dos sexos, sem significância estatística. Conclusão: Os VTs de CVF e VEF 1 para crianças brasileiras, avaliados segundo Mallozzi, diferem significativamente quanto aos VTs de Polgar. Como conseqüência, encontramos, utilizando as equações de Mallozzi, tendência maior em diagnosticar dificuldade obstrutiva e menor em achados de insuficiência ventilatória restritiva. (J Pneumol 2002;28(3):125-130) Comparison between the theoretical values for spirometric data in children determined by Mallozi's and Polgar's equations Objective: This paper is a continuation of the study on the validity of equations of predicted value (PV) for the Brazilian population. A comparison was made between the equations proposed by Mallozi and byPolgar for the Brazilian population, which are mainly used in the United States and Europe. Methods: PVs of 185 patients of both sexes (89 boys and 96 girls), ages between 6 and 17 years, were analyzed. For each subject, the PVs for forced vital capacity (FVC), forced expiratory volume at 1 sec. (FEV 1 ), and the medium expiratory flow (MEF) were calculated according to the equations proposed by Mallozi and Polgar. Results were compared. Diagnoses were made according to the Brazilian Consensus of Spirometry. Results: The PV-M for FVC is 0.38% higher for boys and 2.19% higher for girls than that determined by Polgar. The PV-P for FEV 1 is 6.67% (p < 0.05) lower for girls, suggesting an underassessment of the obstructive impairment. For boys, a mean lower value of 7.26% as compared to the VT-M is at the limit of significance (0.05 < p < 0.01). No significant difference between the two equations analyzed was found for MEF. Conclusions: The PVs for CVF and VEF 1 for Brazilian children, according to Mallozzi, are significantly different when compared to those published by authors like Polgar. As a result, the authors found that Mallozzi's equations are more likely to detect obstructive impairment and less likely to diagnose restrictive ventilatory insufficiency.ARTIGO ORIGINAL

Comparação entre três equações de referência para a espirometria em crianças e adolescentes com diferentes índices de massa corpórea

“…Promadhat and Mallozi found comparable results in all age brackets, in both genders. (28) There have been no studies comparing the three sets of equations, as proposed in the present study. Some values generated by the three sets of equations for FVC and FEV 1 in 122 children and adolescent with distinct BMI did not differ significantly.…”

Viabilidade da realização de espirometria em pré-escolares

“…(21) The results obtained in those two studies were extremely similar. (22) Descriptive studies such as ours show the need for nationwide studies aimed at determining reference values for spirometry in healthy schoolchildren in Brazil. This has already been done in populations of preschool children in the United States, (8) the United Kingdom, (23) and Norway.…”

Avaliação funcional pulmonar em crianças e adolescentes asmáticos: comparação entre a micro espirometria e a espirometria convencional

“…According to Ladosky (15) , Polgar and Weng extensively reviewed the spirometric equations available and proposed the most coherent ones for clinical use in children. These equations proposed are commonly used in our milieu.…”