Khadivzade Talat, Arghavani Elham, Shokrollahi Paymaneh, Ghazanfarpour Masumeh, Kareshki Hossein
a Department of Midwifery, School of Nursing and Midwifery , Mashhad University of Medical Sciences , Mashhad , Iran.
b Department of Midwifery , Islamic Azad University , Firozabad , Iran.
J Obstet Gynaecol. 2018 May;38(4):470-475. doi: 10.1080/01443615.2017.1379967. Epub 2018 Feb 1.
The primary aim of this study was to assess the factorial structure of a Childbearing Questionnaire (CBQ). Using confirmatory factor analysis, it examined modified eight-factor models on a sample of 448 couples. Cronbach's alpha coefficients were 0.90 and 0.83 for positive and negative childbearing motivation, respectively, and the intra-class correlation coefficient (ICC) was in the range of 0.81-0.86, which indicated that the reliability of the questionnaire was high. The modified model was found to have 'adequate' fitness based on the Root Mean Square Error of Approximation (RMSEA), but other indicators such as the Tucker-Lewis Index (TLI) and Comparative Fit Index (CFI) did not show any 'acceptable' fitness. In the eight-factor model, three factors with low loading were removed to achieve adequate fitness. Also, 13 correlated error terms were added to the modified model. The confirmatory factor analysis of the modified model showed 'adequate' fitness (CFI = 0.91, TLI =0.9, RMSEA = 0.06 and Chi-square to a degree of freedom ratio (χ/df) = 3.49). This study supported the use of CBQ as a valid and reliable instrument of childbearing in engaged couples. Impact statement Current research on the subject: Some studies have suggested that the construct validity, internal consistency and the test-retest reliability of a Childbearing Questionnaire (CBQ) are high. The contribution made by the results of this study: It determined the reliability (internal consistency and test-retest reliability), the content validity and construct validity (confirmatory factor analysis) of the Persian version of the Childbearing Questionnaire. The implications of findings for clinical practice and further research: This reliable and valid instrument can be used for measuring the factors affecting childbearing motivations among engaged couples.
本研究的主要目的是评估一份生育问卷（CBQ）的因子结构。通过验证性因子分析，在一个由448对夫妇组成的样本上检验了修正的八因子模型。积极和消极生育动机的Cronbach's alpha系数分别为0.90和0.83，组内相关系数（ICC）在0.81 - 0.86范围内，这表明该问卷的信度较高。基于近似均方根误差（RMSEA），发现修正模型具有“适当”的拟合度，但其他指标如塔克 - 刘易斯指数（TLI）和比较拟合指数（CFI）并未显示出“可接受”的拟合度。在八因子模型中，去除了三个载荷较低的因子以实现适当的拟合度。此外，在修正模型中添加了13个相关误差项。修正模型的验证性因子分析显示出“适当”的拟合度（CFI = 0.91，TLI = 0.9，RMSEA = 0.06，卡方与自由度比（χ/df）= 3.49）。本研究支持将CBQ作为一种有效且可靠的工具用于测量订婚夫妇的生育情况。影响声明当前关于该主题的研究：一些研究表明生育问卷（CBQ）的结构效度、内部一致性和重测信度较高。本研究结果所做的贡献：它确定了波斯语版生育问卷的信度（内部一致性和重测信度）、内容效度和结构效度（验证性因子分析）。研究结果对临床实践和进一步研究的意义：这个可靠且有效的工具可用于测量影响订婚夫妇生育动机的因素。
