S1 Data -

Background and objectives
Family caregiver self-efficacy plays an important role in improving the health and quality of life of patients in the early post-coronary artery bypass grafting (CABG). However, there is a lack of targeted self-efficacy assessment tool for caregivers of patients. Thus, the purpose of this study was to develop a Family Caregiver Self-Efficacy Scale for patients in the early post-CABG (FCSES-EPCABG) and to test its reliability and validity.
Methods
Based on self-efficacy theory, the initial scale was formed by the literature review, semi-structured interviews, Delphi expert consultation, and pre-survey. Through the convenience sampling method, 133 caregivers who met the selection criteria were chosen for the questionnaire survey at Wuhan Asian Heart Hospital from January 2024 to May 2024. The aim was to test the reliability and validity of the scale.
Results
The final scale contained five dimensions of wound care, medication management, cardiac rehabilitation management, social support, and self-care, with a total of 22 items. The item-level content validity index ranged from 0.889 to 1.000, the scale-level content validity index/average was 0.985, and the content validity ratio ranged from 0.778 to 1.000. The exploratory factor analysis showed that the cumulative variance contribution rate of the five dimensions was 69.433%. In the criterion-related validity analysis, the total score of the FCSES-EPCABG was positively correlated with the total score of the General Self-Efficacy Scale (r = 0.762, P<0.001). The Cronbach’s alpha coefficient of the scale was 0.919, the half reliability was 0.779, and the test-retest reliability was 0.936.
Conclusion
The FCSES-EPCABG has satisfactory reliability and validity, which is suitable for evaluating the self-efficacy of family caregivers of patients in the early post-CABG.

背景与目的：家庭照顾者自我效能感对冠状动脉旁路移植术（coronary artery bypass grafting, CABG）术后早期患者的健康状况与生活质量改善具有重要作用。然而，目前尚缺乏针对此类患者照顾者的针对性自我效能感评估工具。为此，本研究旨在编制冠状动脉旁路移植术术后早期患者家庭照顾者自我效能量表（Family Caregiver Self-Efficacy Scale for patients in the early post-CABG, FCSES-EPCABG），并检验其信效度。
方法：基于自我效能感理论，通过文献调研、半结构化访谈、德尔菲专家咨询及预调查形成初始量表。本研究于2024年1月至2024年5月在武汉亚洲心脏病医院采用便利抽样法，选取符合纳入标准的133名照顾者开展问卷调查，以检验该量表的信效度。
结果：最终量表包含伤口护理、药物管理、心脏康复管理、社会支持及自我照顾5个维度，共计22个条目。条目水平内容效度指数（item-level content validity index, I-CVI）范围为0.889~1.000，量表水平内容效度指数均值（scale-level content validity index/average, S-CVI/Ave）为0.985，内容效度比（content validity ratio, CVR）范围为0.778~1.000。探索性因子分析结果显示，5个维度的累积方差贡献率为69.433%。效标关联效度分析表明，FCSES-EPCABG总分与一般自我效能量表（General Self-Efficacy Scale, GSES）总分呈正相关（r=0.762, P<0.001）。该量表的克朗巴赫α系数为0.919，分半信度为0.779，重测信度为0.936。
结论：FCSES-EPCABG具有良好的信效度，适用于评估冠状动脉旁路移植术术后早期患者家庭照顾者的自我效能感水平。