Khazaee-Pool Maryam, Pashaei Tahereh, Ponnet Koen, Jafari Fatemeh, Alizadeh Rashin
Department of Health Education and Promotion, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran.
Social Determinants of Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran.
BMC Public Health. 2017 May 25;17(1):507. doi: 10.1186/s12889-017-4425-2.
One effective model for studying cigarette smoking cessation is the transtheoretical model (TTM). In order to assess to what degree interventions can make variations in individuals' behavior, several questionnaires have been developed based on the TTM. This study aims to describe the development of the Persian version of the Decisional Balance Inventory (DBI) for smoking cessation in Iran and to evaluate its psychometric properties.
The forward-backward technique was used to translate the DBI from English into Persian. After linguistic validation and a pilot test among 30 male smoking young adults, a cross-sectional study was performed, and psychometric properties of the Persian version of the DBI were assessed. Using a convenience sampling method, 120 male smokers between 16 and 24 years of age were recruited from three factories in Nowshahr, Iran. In order to assess the reliability of the DBI, internal consistency and test-retest methods were performed. Additionally, face and content validity were assessed, and the construct validity of the DBI was calculated by performing both exploratory and confirmatory factor analysis. Data were analyzed using SPSS and AMOS.
The mean age of the sample (n = 120) was 20.19 (SD = 2.13) years. The mean scores for the content validity index (CVI) and the content validity ratio (CVR) were .94 and .89, respectively. The results of exploratory factor analysis (EFA) showed a three-factor solution for the DBI that accounted for 55.4% of observed variance. The results achieved from the confirmatory factor analysis (CFA) displayed that the data fit the model: the relative chi-square (×2/df) = 1.733 (p < .001) and the root mean square error of approximation (RMSEA) = .07 (90% CI = .05-.105). All comparative indices of the model including GFI, AGFI, CFI, NNFI, and NFI were more than .80 (.87, .83, .91, .89, and .81, respectively). The Cronbach's alpha ranged from .78 to .83, indicating an acceptable reliability. Furthermore, the intraclass correlation coefficient (ICC) ranged from .72 to .89, confirming a satisfactory result.
The results from the present study indicate that the Persian version of the DBI has good psychometric properties and is suitable to measure smoking behaviors among Iranian adolescent and young adult smokers. Consequently, the instrument could be used in planning cigarette smoking cessation interventions among Iranian adolescents and young adults.
研究戒烟的一种有效模型是跨理论模型（TTM）。为了评估干预措施能在多大程度上改变个体行为，基于TTM开发了几份问卷。本研究旨在描述伊朗用于戒烟的波斯语版决策平衡量表（DBI）的开发过程，并评估其心理测量特性。
采用前后翻译技术将DBI从英语翻译成波斯语。在进行语言验证并对30名吸烟的年轻男性成年人进行预试验后，开展了一项横断面研究，并评估了波斯语版DBI的心理测量特性。采用便利抽样方法，从伊朗诺沙赫尔的三家工厂招募了120名年龄在16至24岁之间的男性吸烟者。为了评估DBI的信度，采用了内部一致性和重测法。此外，评估了表面效度和内容效度，并通过探索性和验证性因子分析计算了DBI的结构效度。使用SPSS和AMOS对数据进行分析。
样本（n = 120）的平均年龄为20.19岁（标准差 = 2.13）。内容效度指数（CVI）和内容效度比（CVR）的平均得分分别为0.94和0.89。探索性因子分析（EFA）结果显示DBI有一个三因子解，解释了55.4%的观测方差。验证性因子分析（CFA）结果表明数据拟合模型：相对卡方（χ²/df）= 1.733（p <.001），近似均方根误差（RMSEA）= 0.07（90%置信区间 = 0.05 - 0.105）。模型的所有比较指标，包括GFI、AGFI、CFI、NNFI和NFI均大于0.80（分别为0.87、0.83、0.91、0.89和0.81）。克朗巴哈系数在0.78至0.83之间，表明信度可接受。此外，组内相关系数（ICC）在0.72至0.89之间，证实结果令人满意。
本研究结果表明，波斯语版DBI具有良好的心理测量特性，适用于测量伊朗青少年和年轻成年吸烟者的吸烟行为。因此，该工具可用于规划伊朗青少年和年轻成年人的戒烟干预措施。
