Tudor-Locke Catrine, Mire Emily F, Dentro Kara N, Barreira Tiago V, Schuna John M, Zhao Pei, Tremblay Mark S, Standage Martyn, Sarmiento Olga L, Onywera Vincent, Olds Tim, Matsudo Victor, Maia José, Maher Carol, Lambert Estelle V, Kurpad Anura, Kuriyan Rebecca, Hu Gang, Fogelholm Mikael, Chaput Jean-Philippe, Church Timothy S, Katzmarzyk Peter T
Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA, 70808, USA.
Syracuse University, Syracuse, USA.
Int J Behav Nutr Phys Act. 2015 Apr 20;12:52. doi: 10.1186/s12966-015-0213-5.
We present a model for reporting accelerometer paradata (process-related data produced from survey administration) collected in the International Study of Childhood Obesity Lifestyle and the Environment (ISCOLE), a multi-national investigation of >7000 children (averaging 10.5 years of age) sampled from 12 different developed and developing countries and five continents.
ISCOLE employed a 24-hr waist worn 7-day protocol using the ActiGraph GT3X+. Checklists, flow charts, and systematic data queries documented accelerometer paradata from enrollment to data collection and treatment. Paradata included counts of consented and eligible participants, accelerometers distributed for initial and additional monitoring (site specific decisions in the face of initial monitoring failure), inadequate data (e.g., lost/malfunction, insufficient wear time), and averages for waking wear time, valid days of data, participants with valid data (≥4 valid days of data, including 1 weekend day), and minutes with implausibly high values (≥20,000 activity counts/min).
Of 7806 consented participants, 7372 were deemed eligible to participate, 7314 accelerometers were distributed for initial monitoring and another 106 for additional monitoring. 414 accelerometer data files were inadequate (primarily due to insufficient wear time). Only 29 accelerometers were lost during the implementation of ISCOLE worldwide. The final locked data file consisted of 6553 participant files (90.0% relative to number of participants who completed monitoring) with valid waking wear time, averaging 6.5 valid days and 888.4 minutes/day (14.8 hours). We documented 4762 minutes with implausibly high activity count values from 695 unique participants (9.4% of eligible participants and <0.01% of all minutes).
Detailed accelerometer paradata is useful for standardizing communication, facilitating study management, improving the representative qualities of surveys, tracking study endpoint attainment, comparing studies, and ultimately anticipating and controlling costs.
ClinicalTrials.gov: NCT01722500.
我们提出了一个用于报告在儿童肥胖、生活方式与环境国际研究（ISCOLE）中收集的加速度计辅助数据（由调查管理产生的与过程相关的数据）的模型，ISCOLE是一项对来自12个不同发达国家和发展中国家以及五大洲的7000多名儿童（平均年龄10.5岁）进行的多国调查。
ISCOLE采用了一项为期7天、每天佩戴24小时的方案，使用ActiGraph GT3X+加速度计。检查表、流程图和系统数据查询记录了从登记到数据收集及处理的加速度计辅助数据。辅助数据包括同意参与和符合条件的参与者数量、为初始监测和额外监测分发的加速度计（面对初始监测失败时的特定地点决策）、数据不充分情况（如丢失/故障、佩戴时间不足），以及清醒佩戴时间的平均值、有效数据天数、有有效数据的参与者（≥4个有效数据天数，包括1个周末日），和活动计数异常高（≥20,000次活动计数/分钟）的分钟数。
在7806名同意参与的参与者中，7372名被认为符合参与条件，7314个加速度计被分发用于初始监测，另有106个用于额外监测。414个加速度计数据文件不充分（主要是由于佩戴时间不足）。在全球范围内实施ISCOLE期间，仅29个加速度计丢失。最终锁定的数据文件由6553个参与者文件组成（相对于完成监测的参与者数量的90.0%），具有有效的清醒佩戴时间，平均为6.5个有效天数和888.4分钟/天（14.8小时）。我们记录了来自695名独特参与者的4762分钟活动计数异常高的值（占符合条件参与者的9.4%，占所有分钟数的<0.01%）。
详细的加速度计辅助数据有助于规范沟通、促进研究管理、提高调查的代表性质量、跟踪研究终点达成情况、比较研究，并最终预测和控制成本。
ClinicalTrials.gov：NCT01722500。
