Road Traffic Injury Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
Department of Health Education and Promotion, Tabriz University of Medical Sciences, Tabriz, Iran.
BMC Public Health. 2022 Oct 8;22(1):1880. doi: 10.1186/s12889-022-14262-x.
Sedentary behavior (SB) is an independent risk factor causing chronic diseases. Previous studies compared sitting time mostly with physical activity. The present study aimed to evaluate the validity and reliability of the Last-7-Day Sedentary Time Questionnaire (SIT-Q-7d) in Iran. Moreover, SB was assessed among the study participants.
The current validity study was conducted among 290 subjects (51.7% males vs. 48.3% females) with a mean age of 34.81 ± 9.63 years in Poldasht, Iran. Sampling was done using simple random sampling and the data were collected using the SIT-Q-7d. To confirm the validity of the questionnaire, forward-backward translation method, content validity, and construct validity were used. Furthermore, temporal stability was calculated by the test-retest method and internal consistency coefficient (ICC).
Our results confirmed the content validity of the questionnaire (content validity score: 0.90 and content validity index: 0.80). Using exploratory factor analysis (EFA), seven factors of SB were identified as follows: eating while sitting down, doing domestic affairs, screen time, leisure time, studying books, watching TV, and attending family gatherings. The reliability of the questionnaire was confirmed using Cronbach's alpha (α = 0.7). In addition, temporal stability was confirmed by test-retest method and ICC was 0.9 (95% CI: 83-97).
Our results confirmed that the Persian version of SIT-Q-7d is a reliable and valid tool for assessing SB.
久坐行为（SB）是导致慢性病的独立危险因素。先前的研究大多将久坐时间与身体活动进行比较。本研究旨在评估 Last-7-Day Sedentary Time Questionnaire（SIT-Q-7d）在伊朗的有效性和可靠性。此外，还评估了研究参与者的 SB。
本有效性研究在伊朗波尔达斯赫特的 290 名受试者（51.7%男性对 48.3%女性）中进行，平均年龄为 34.81±9.63 岁。采用简单随机抽样进行采样，使用 SIT-Q-7d 收集数据。为了确认问卷的有效性，采用了正向-反向翻译法、内容效度和结构效度。此外，还通过测试-重测法和内部一致性系数（ICC）计算了时间稳定性。
我们的结果证实了问卷的内容效度（内容效度评分：0.90，内容效度指数：0.80）。通过探索性因子分析（EFA），确定了 SB 的七个因素，分别为：坐着吃饭、做家务、屏幕时间、休闲时间、看书、看电视和参加家庭聚会。使用 Cronbach's alpha（α=0.7）确认了问卷的可靠性。此外，通过测试-重测法证实了时间稳定性，ICC 为 0.9（95%CI：83-97）。
我们的结果证实，波斯语版的 SIT-Q-7d 是评估 SB 的可靠有效工具。
