ABSTRACT

This study examined the concurrent validity of a tummy time questionnaire and time-use diary against an accelerometer measure. Participants were 29 parents and their 6-month-old infants from the Early Movers project in Edmonton, Canada. Tummy time was concurrently measured using a parental questionnaire, a time-use diary, and a validated GENEActiv accelerometer. In participants with data on all measures (n = 26), relative (Spearman’s rank correlations) and absolute (Wilcoxon signed-rank tests and Bland–Altman plots) concurrent validity were examined. The questionnaire (r_s = 0.60) and time-use diary (r_s = 0.80) tummy time measures were significantly correlated with the accelerometer measure, with large effect sizes (r > 0.50). Compared to the accelerometer measure of tummy time, a significant difference in mean rank was observed for the questionnaire measure but not for the time-use diary measure. Bland–Altman plots showed a significant mean difference in tummy time between the accelerometer and questionnaire measures (42 min/d; 95% limits of agreement: −73,157 min/d) but not between the accelerometer and time-use diary measures (2 min/d; 95% limits of agreement: −47,51 min/d). These preliminary findings indicate both subjective measures may be appropriate for infant studies examining associations with tummy time and/or comparing tummy time between samples. The time-use diary may also provide a relatively precise estimate of tummy time in prevalence studies.

摘要

本研究检验了俯卧时间问卷和时间使用日记与加速度计测量的同时有效性。参与者是来自加拿大埃德蒙顿的 Early Movers 项目的 29 名父母和他们 6 个月大的婴儿。同时使用父母问卷、时间使用日记和经过验证的 GENEActiv 加速度计测量俯卧时间。在所有测量数据的参与者（n = 26）中，检查了相对（Spearman 秩相关）和绝对（Wilcoxon 符号秩检验和 Bland-Altman 图）同时有效性。问卷（r _s  = 0.60）和时间使用日记（r _s = 0.80) 俯卧时间测量与加速度计测量显着相关，具有较大的影响大小 (r > 0.50)。与俯卧时间的加速度计测量相比，问卷测量的平均排名存在显着差异，而时间使用日记测量则没有。Bland-Altman 图显示加速度计和问卷测量之间的俯卧时间有显着平均差异（42 分钟/天；95% 的一致性限制：-73,157 分钟/天），但在加速度计和时间使用日记测量之间没有显着差异（2 分钟/d；95% 的一致性限制：-47.51 min/d)。这些初步研究结果表明，这两种主观测量都可能适用于婴儿研究，检查与俯卧时间的关联和/或比较样本之间的俯卧时间。