Graduate Program of Pediatrics and Children's Health, Pontifícia Universidade Católica do Rio Grande do Sul-PUCRS, Porto Alegre, Rio Grande do Sul, Brazil.
Respir Med. 2012 Dec;106(12):1639-46. doi: 10.1016/j.rmed.2012.08.015. Epub 2012 Sep 10.
To generate reference values for respiratory muscle strength in healthy children aged three to twelve years.
Participants were recruited from three schools and selected after a respiratory disease questionnaire analysis and written informed consent by parents or guardians. All participants included in the study had normal spirometry, height and weight were measured on the same day. Respiratory muscle strength was evaluated 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 forced vital capacity showed moderate to strong correlations with both respiratory pressures. However, the regression model showed that 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 excellent reproducibility between tests.
The results of this study demonstrate that the behavior of respiratory muscle strength in healthy preschool and school children can be explained by age, height and weight.
为 3 至 12 岁健康儿童的呼吸肌力量生成参考值。
参与者从三所学校招募，并在进行呼吸道疾病问卷分析和家长或监护人书面知情同意后选择。所有纳入研究的参与者均具有正常的肺量计检查，身高和体重在同一天测量。呼吸肌力量由一名检查者根据肺功能检查指南进行评估。使用多元线性回归模型分析 MIP 和 MEP 值与潜在预测变量之间的关联。
共选择了 171 名参与者，并按年龄均匀分布。年龄、身高、体重和用力肺活量与两种呼吸压均呈中度至强相关性。然而，回归模型显示，身高和体重是预测男性和女性 MIP 的最佳变量，而年龄和体重是预测 MEP 的最佳变量。预测能力（R²）范围为 46%至 58%。在亚组中使用组内相关系数，测试之间显示出极好的可重复性。
本研究结果表明，健康学龄前和学龄儿童的呼吸肌力量行为可以用年龄、身高和体重来解释。
