Cruz Diná de Almeida Lopes Monteiro da, Wilson Ana Maria Miranda Martins, Melo Michele Nakahara, Conceição Ana Paula da, Diaz Leidy Johanna Rueda
Escola de Enfermagem, Universidade de São Paulo, São Paulo, SP, Brazil.
Escola de Enfermagem, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
Rev Lat Am Enfermagem. 2020;28:e3313. doi: 10.1590/1518-8345.3378.3313. Epub 2020 Aug 31.
to evaluate the psychometric properties of the Self-Care Confidence Scale in heart failure in the Brazilian version of the Self Care Heart Failure Index, version 6.2, using the Rasch model criteria.
secondary study, of psychometric analysis, using the Rasch model, of the six items of the scale. The sample consisted of 409 patients with heart failure undergoing outpatient treatment [mean age 57.9 (standard deviation = 11.6) years, 54.8% male].
of the total of six items, one ("De maneira geral, você está confiante sobre estar livre dos sintomas de insuficiência cardíaca?") presented maladjustment to the model (Infit = 1.84 and Outfit = 1.99). After the exclusion of this item, the others showed a good fit, composed one dimension and explained 55% of the variance in the data; the categories of response to the items were adequate, the values of separation and reliability of person were 2.13 and 0.82, respectively, and Cronbach's alpha was 0.87. Items of extreme difficulty were identified and there is no differential functioning of the items in relation to sex.
with the exclusion of the first item, the Self-Care Confidence Scale showed good psychometric properties, with caution in interpreting the results of the six-item scale.
使用拉施模型标准评估巴西版自我护理心力衰竭指数6.2版中自我护理信心量表在心力衰竭患者中的心理测量特性。
采用拉施模型对该量表的六个项目进行心理测量分析的二次研究。样本包括409例接受门诊治疗的心力衰竭患者[平均年龄57.9（标准差=11.6）岁，男性占54.8%]。
在总共六个项目中，一个项目（“总体而言，您对摆脱心力衰竭症状有信心吗？”）与模型不匹配（拟合优度=1.84，外在拟合优度=1.99）。排除该项目后，其他项目显示出良好的拟合度，构成一个维度并解释了数据中55%的方差；项目的反应类别合适，人员分离度和信度值分别为2.13和0.82，克朗巴赫α系数为0.87。确定了极难的项目，且项目在性别方面没有差异功能。
排除第一个项目后，自我护理信心量表显示出良好的心理测量特性，但在解释六项量表的结果时需谨慎。
