Cornélio Marília Estevam, Gallani Maria Cecília Bueno Jayme, Godin Gaston, Rodrigues Roberta Cunha Matheus, Mendes Roberto Dela Rosa, Nadruz Junior Wilson
Universidade Estadual de Campinas, Brazil.
Rev Lat Am Enfermagem. 2009 Sep-Oct;17(5):701-7. doi: 10.1590/s0104-11692009000500017.
This study aimed to present the content validity and reliability analyses of an instrument to study the determinant factors of salt consumption among hypertensive subjects, based on an extension of the Theory of Planned Behavior. Content validity was assessed by 3 experts and a pre-test was carried out with 5 subjects. The final tool, comprising 3 different behaviors related to salt consumption and corresponding psychosocial variables, was applied to 32 subjects for internal consistency and temporal stability (15-day interval) analysis. Cronbach's alpha coefficients > 0.70 and significant intra-class correlation coefficients were observed for most variables, indicating the temporal stability of the measured concepts. The developed instrument exhibited evidence of both content validity and reliability.
本研究旨在基于计划行为理论的扩展，对一项用于研究高血压患者盐摄入决定因素的工具进行内容效度和信度分析。由3名专家评估内容效度，并对5名受试者进行了预测试。最终工具包括与盐摄入相关的3种不同行为及相应的心理社会变量，应用于32名受试者以进行内部一致性和时间稳定性（间隔15天）分析。大多数变量的Cronbach's α系数>0.70，且组内相关系数显著，表明所测概念具有时间稳定性。所开发的工具显示出内容效度和信度的证据。
