Dehdari Tahereh, Mirzaei Nasim, Taghdisi Mohamad Hossein, Khosropour Ashkan, Zare Najaf
Assistant Professor, Department of Health Education and Health Promotion, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
PhD Student, Department of Health Education and Health Promotion, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
Addict Health. 2018 Apr;10(2):102-111. doi: 10.22122/ahj.v10i2.563.
Transtheoretical model (TTM) has been recognized as a common theoretical model in researches in terms of addictive behaviors. The aim of this study was to examine the psychometric properties of the Persian brief version of the TTM for hookah tobacco smoking cessation in a sample of Iranian rural adults who were in the preparation stage for hookah cessation.
This was a validation study on Iranian rural adult hookah smokers by the TTM instrument. First, to translate the questionnaire items from English to Persian, backward-forward procedure was used. Face and content validity of the instrument items were assessed. Confirmatory factor analysis (CFA) was performed to determine the construct validity of the instrument. For this aim, 300 participants completed the instrument. Cronbach's alpha coefficient and intraclass correlation coefficient (ICC) were calculated to examine the internal consistency and reliability of the subscales of the instrument.
The content validity index (CVI) and content validity ratio (CVR) of the items were ≥ 0.80 and ≥ 0.60, respectively. Based on CFA, the data fitted the TTM model. root mean square error of approximation (RMSEA), the goodness of fit index (GFI), adjusted GFI, and comparative fit index (CFI) were 0.037, 0.960, 0.910, and 0.950, respectively. At this stage, 6 items were deleted. The ICC and Cronbach's alpha of the subscales ranged between 0.60-0.74 and 0.71-0.86, respectively. The final instrument with 29 items was confirmed.
The findings suggest that translating Persian brief version of the TTM instrument was a reliable and valid tool to identify the determinants of hookah smoking cessation among Iranian rural adults.
跨理论模型（TTM）已被公认为成瘾行为研究中的常用理论模型。本研究旨在检验波斯语简版TTM在处于水烟戒烟准备阶段的伊朗农村成年人样本中用于水烟戒烟的心理测量特性。
这是一项使用TTM工具对伊朗农村成年水烟吸烟者进行的验证性研究。首先，采用回译法将问卷项目从英语翻译成波斯语。评估了工具项目的表面效度和内容效度。进行验证性因素分析（CFA）以确定工具的结构效度。为此，300名参与者完成了该工具。计算了克朗巴哈α系数和组内相关系数（ICC）以检验工具各分量表的内部一致性和信度。
项目的内容效度指数（CVI）和内容效度比（CVR）分别≥0.80和≥0.60。基于CFA，数据拟合TTM模型。近似均方根误差（RMSEA）、拟合优度指数（GFI）、调整后GFI和比较拟合指数（CFI）分别为0.037、0.960、0.910和0.950。在此阶段，删除了6个项目。各分量表的ICC和克朗巴哈α系数分别在0.60 - 0.74和0.71 - 0.86之间。最终确定了包含29个项目的工具。
研究结果表明，波斯语简版TTM工具是识别伊朗农村成年人水烟戒烟决定因素的可靠且有效的工具。
