Department of Public Health and Clinical Medicine, Umeå University, 901 87 Umeå, Sweden.
Int J Environ Res Public Health. 2022 Apr 2;19(7):4269. doi: 10.3390/ijerph19074269.
Time spent in sedentary behavior (SB) has increased during the last decades. Accurate assessments are of importance when studying health consequences of SB. This study aimed to assess concurrent validity between three different questions for self-reported sitting and thigh worn accelerometer data. In total, 86 participants wore the ActivPAL accelerometer during three separate weeks, assessing sitting time with different questions each week. The questions used were Katzmarzyk, GIH stationary single-item question (SED-GIH), and a modified version of the single-item from IPAQ short form. In total 64, 57, and 55 participants provided valid accelerometer and questionnaire data at each time-point, respectively, and were included for analysis. Spearman and Pearson correlation was used to assess the validity. The three questions, Katzmarzyk, SED-GIH, and a modified question from IPAQ all showed a weak non-significant correlation to ActivPAL with r-values of 0.26, 0.25, and 0.19 respectively. For Katzmarzyk and SED-GIH, 50% and 37% reported correctly, respectively. For the modified IPAQ, 53% over-reported and 47% under-reported their sitting time. In line with previous research, our study shows poor validity for self-reported sitting-time. For future research, the use of sensor-based data on SB are of high importance.
在过去几十年中，人们久坐不动的时间增加了。当研究 SB 对健康的影响时，准确的评估非常重要。本研究旨在评估三种不同的自我报告坐姿和大腿佩戴加速度计数据问题之间的同时效度。总共有 86 名参与者在三个不同的星期内佩戴 ActivPAL 加速度计，每个星期使用不同的问题来评估坐姿时间。使用的问题是 Katzmarzyk、GIH 固定式单项问题（SED-GIH）和 IPAQ 短表的单项修改版。总共有 64、57 和 55 名参与者在每个时间点分别提供了有效的加速度计和问卷数据，并被纳入分析。使用 Spearman 和 Pearson 相关系数来评估有效性。这三个问题，Katzmarzyk、SED-GIH 和 IPAQ 的修改问题与 ActivPAL 的相关性均较弱且无统计学意义，相关系数分别为 0.26、0.25 和 0.19。对于 Katzmarzyk 和 SED-GIH，分别有 50%和 37%的人报告正确。对于修改后的 IPAQ，有 53%的人过度报告，47%的人报告过低。与之前的研究一致，我们的研究表明自我报告的坐姿时间有效性较差。对于未来的研究，使用基于传感器的 SB 数据非常重要。
