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Previous issue date: 2012-03-15 / The evaluation of respiratory muscle strength is a noninvasive and easily applicable method, used for the measurement of maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP). However, there are no reference values for children in preschool age, which makes it difficult to standardize the results and complicates the assessment of respiratory muscle function. Thus, the objective of present study was to generate reference values for respiratory muscle strength in healthy children and adolescents aged between three to twelve years old. Participants were recruited from three schools and selected after a respiratory disease questionnaire analysis and attainment of informed and written consent by parents or guardians. All participants included in the study had normal spirometry and measures of height and weight were performed in the same day. The evaluation of respiratory muscle strength was performed by a single examiner following the guidelines for pulmonary function tests. The association between MIP and MEP values with the potential predictive variables was analyzed using a multiple linear regression model. A total of 171 participants were selected and distributed evenly by age. The age, height, weight and FVC showed moderate to strong correlations with both respiratory pressures. However, the regression model showed that the height and weight were the best variables to predict MIP in both sexes and age and weight to predict MEP. The power of prediction (R2) ranged from 46 to 58%. The intraclass correlation coefficient was used in a subgroup and demonstrated an excellent reproducibility between tests. In conclusion, the results of present study demonstrate that the behavior of respiratory muscle strength in healthy preschool and school children can be explained by age, height and weight. / A avalia??o da for?a muscular respirat?ria ? um m?todo n?o invasivo e de f?cil aplicabilidade, utilizado para a mensura??o da press?o inspirat?ria m?xima (PIMAX) e da press?o expirat?ria m?xima (PEMAX). No entanto, ainda n?o existem valores de refer?ncia para crian?as em idade pr?-escolar, impossibilitando a normaliza??o dos resultados obtidos e dificultando a avalia??o da fun??o muscular respirat?ria. Assim, o objetivo deste estudo foi gerar valores de refer?ncia para a for?a muscular respirat?ria em crian?as e adolescentes saud?veis de tr?s a doze anos de idade. Os participantes foram recrutados atrav?s de tr?s escolas e selecionados ap?s an?lise do question?rio de doen?as respirat?rias e assinatura do termo de consentimento pelos pais ou respons?veis. Todos os participantes inclu?dos no estudo possu?am exame espirom?trico normal e medidas de peso e altura no dia da mensura??o. A avalia??o da for?a muscular respirat?ria foi realizada por um ?nico avaliador seguindo as diretrizes para testes de fun??o pulmonar. A associa??o entre os valores de PIMAX e PEMAX com as potenciais vari?veis preditoras foram analizadas utilizando-se um modelo de regress?o linear m?ltipla. Um total de 171 participantes foram selecionados e distribu?dos uniformemente por faixa et?ria. A idade, altura, peso e CVF apresentaram correla??es de moderada ? forte com ambas as press?es respirat?rias. No entanto, o modelo de regress?o demonstrou que a altura e o peso foram as melhores vari?veis para predi??o da PIMAX em ambos os sexos e o peso e a idade para a PEMAX. A for?a de predi??o (R2) variou de 46 a 58%. O coeficiente de correla??o intraclasse foi utilizado em um subgrupo e demonstrou excelente reprodutibilidade entre os testes. Em conclus?o, os resultados do presente estudo demonstram que o comportamento da for?a muscular respirat?ria em pr?-escolares e escolares saud?veis pode ser explicado em fun??o da idade, altura e peso.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/1388 |
| Date | 15 March 2012 |
| Creators | Heinzmann Filho, Jo?o Paulo |
| Contributors | Donadio, M?rcio Vin?cius Fagundes |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Medicina/Pediatria e Sa?de da Crian?a, PUCRS, BR, Faculdade de Medicina |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 3098206005268432148, 500, 600, -8624664729441623247 |
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