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Força endurance dos músculos respiratórios – valores normativos e equações de referência: Estudo piloto
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Estabelecer equações de referência e valores normativos para a força endurance dos músculos respiratórios na população portuguesa, considerando características sociodemográficas e antropométricas. Estudo piloto em adultos saudáveis portugueses entre os 18 e os 82 anos. Foram recolhidos dados sociodemográficos e antropométricos, avaliada a pressão inspiratória máxima (PIM) e aplicado o teste de carga incremental (TCI), que resultou em dois outcomes principais: tempo (segundos) e %PIM atingida. A análise estatística incluiu estatística descritiva para determinar valores normativos, correlações de Spearman, teste t para variáveis independentes e regressão linear múltipla (stepwise), com o objetivo de explorar associações entre as variáveis e desenvolver equações de referência, respetivamente, para um nível de significância de 0,05. Foram incluídos 82 indivíduos (65,9% do sexo feminino), com mediana de idades de 32,5 anos. Os homens apresentaram valores superiores em todas as variáveis do TCI. A altura, a massa corporal e o nível de atividade física revelaram-se preditores significativos, explicando cerca de 24% da variabilidade observada. Foram obtidas as seguintes equações de referência específicas para a população portuguesa: TCI (%PIM) = −23,63 + (0,31 × Altura) + (7,50 × Atividade física) + (0,28 × Massa corporal) e TCI (segundos) = −609,91 + (3,89 × Altura) + (91,64 × Atividade física) + (3,38 × Massa corporal). O estudo apresenta valores normativos e equações de referência para os dois outcomes do TCI em adultos portugueses saudáveis, úteis na prática clínica e no diagnóstico precoce de alterações clínicas.
To establish reference equations and normative values for respiratory muscle endurance in healthy Portuguese adults, considering sociodemographic and anthropometric characteristics. A pilot study was conducted with 82 healthy Portuguese adults aged 18 to 82 years. Sociodemographic and anthropometric data were collected, maximal inspiratory pressure (MIP) was assessed, and the incremental threshold loading test (ITL) was performed, yielding two outcomes: time (in seconds) and percentage of MIP achieved. Statistical analysis included descriptive statistics to determine normative values, Spearman’s correlation, independent t-tests, and multiple linear regression (stepwise) to explore associations and develop reference equations, adopting a significance level of 0.05. A total of 82 individuals were included (65.9% female), with a median age of 32.5 years. Men showed higher values in all TCI variables. Height, body mass, and physical activity were identified as significant predictors, explaining approximately 24% of the observed variability. Specific reference equations for the Portuguese population were obtained: TCI (%MIP) = −23.63 + (0.31 × Height) + (7.50 × Physical activity) + (0.28 × Body mass) and TCI (seconds) = −609.91 + (3.89 × Height) + (91.64 × Physical activity) + (3.38 × Body mass). This study provides normative values and reference equations for the TCI in healthy Portuguese adults, serving as a valuable tool for clinical practice and the early detection of respiratory impairments.
To establish reference equations and normative values for respiratory muscle endurance in healthy Portuguese adults, considering sociodemographic and anthropometric characteristics. A pilot study was conducted with 82 healthy Portuguese adults aged 18 to 82 years. Sociodemographic and anthropometric data were collected, maximal inspiratory pressure (MIP) was assessed, and the incremental threshold loading test (ITL) was performed, yielding two outcomes: time (in seconds) and percentage of MIP achieved. Statistical analysis included descriptive statistics to determine normative values, Spearman’s correlation, independent t-tests, and multiple linear regression (stepwise) to explore associations and develop reference equations, adopting a significance level of 0.05. A total of 82 individuals were included (65.9% female), with a median age of 32.5 years. Men showed higher values in all TCI variables. Height, body mass, and physical activity were identified as significant predictors, explaining approximately 24% of the observed variability. Specific reference equations for the Portuguese population were obtained: TCI (%MIP) = −23.63 + (0.31 × Height) + (7.50 × Physical activity) + (0.28 × Body mass) and TCI (seconds) = −609.91 + (3.89 × Height) + (91.64 × Physical activity) + (3.38 × Body mass). This study provides normative values and reference equations for the TCI in healthy Portuguese adults, serving as a valuable tool for clinical practice and the early detection of respiratory impairments.
Descrição
Palavras-chave
Testes de função respiratória Pressão inspiratória máxima Atividade física Antropometri Função pulmonar