BACKGROUND Infertility can have a powerful impact on marital quality. The Revised Dyadic Adjustment Scale (RDAS) is a widely used measure of marital quality. This scale has not been validated in infertile patients. Therefore, this study aimed to evaluate the reliability and validity of the RDAS in a sample of infertile patients. METHODS The sample of this methodological study consisted of 254 infertile patients referring to a referral infertility clinic in Tehran, Iran. A battery of questionnaires was administered to the participants, including a demographic/fertility questionnaire, the RDAS, the Relationship Assessment Scale (RAS), the Kansas Marital Satisfaction Scale (KMSS), the Couples Satisfaction Index- 4 Item (CSI-4), the Hospital Anxiety and Depression Scale (HADS), and the Perceived Stress Scale-4 Item (PSS-4). Internal consistency of the scale was assessed with Cronbach's alpha, construct validity was investigated using confirmatory factor analysis (CFA), and convergent validity was examined by correlating the RDAS with RAS, KMSS, CSI-4, HADS, and PSS-4 instruments. RESULTS The mean total RDAS score was 49.26 ± 9.34, and 100 patients (39.4%) had marital distress based on the cut-off value of < 48. The second-order three-factor model of the RDAS exhibited an excellent fit to the data, as indicated by χ2/df = 2.26; CFI = 0.96; GFI = 0.91; NFI = 0.93; IFI = 0.96; RMSEA = 0.071 and SRMR = 0.050. The RDAS and its subscales revealed satisfactory internal consistency that ranged from 0.664 to 0.847. Convergent validity was confirmed by strong correlations between RDAS scores and scores on the RAS, KMSS, and CSI-4. These correlations also tended to be larger than correlations with measures of HADS-anxiety, HADS-depression, and PSS-4. Among demographic/fertility variables, only infertility duration was found to be correlated to the RDAS. CONCLUSION The RDAS is a reliable and valid inventory for measuring marital quality in infertile patients. Further validation studies are needed to generalize the underlying structure of the scale in various populations.

中文翻译：

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波斯版修订后的二元调整量表（RDAS）：一项针对不育患者的验证研究。

背景技术不育可能对婚姻质量产生重大影响。修订后的二元调整量表（RDAS）是一种广泛使用的婚姻质量衡量标准。该量表尚未在不育患者中得到验证。因此，本研究旨在评估不育患者样本中RDAS的可靠性和有效性。方法该方法学研究的样本由254名不育患者组成，涉及伊朗德黑兰的转诊不育诊所。对参与者进行了一系列问卷调查，包括人口统计学/生育率问卷，RDAS，关系评估量表（RAS），堪萨斯州婚姻满意度量表（KMSS），夫妻满意度指数-4项目（CSI-4），医院焦虑和抑郁量表（HADS）和感知压力量表4（PSS-4）。使用Cronbach'sα评估量表的内部一致性，使用验证性因子分析（CFA）研究结构效度，并通过将RDAS与RAS，KMSS，CSI-4，HADS和PSS-4仪器相关联来检验收敛效度。结果RDAS的平均总得分为49.26±9.34，基于截止值<48的情况，有100名患者（39.4％）患有婚姻困扰。RDAS的二阶三因素模型显示出与该数据的极佳拟合，由χ2/ df = 2.26表示；CFI = 0.96；GFI = 0.91；NFI = 0.93；IFI = 0.96；RMSEA = 0.071，SRMR = 0.050。RDAS及其分量表显示出令人满意的内部一致性，范围从0.664到0.847。RDAS评分与RAS，KMSS和CSI-4评分之间的强相关性证实了聚合效度。这些相关性也往往大于与HADS焦虑，HADS抑郁和PSS-4量度的相关性。在人口/生育率变量中，仅发现不孕持续时间与RDAS相关。结论RDAS是用于测量不孕患者婚姻质量的可靠且有效的清单。需要进行进一步的验证研究，以概括各种人群中量表的基本结构。