Abstract：
BACKGROUND:This study aimed to investigate whether awareness of being monitored by an accelerometer has an effect on physical activity in young people. METHODS:Eighty healthy participants aged 10-18 years were randomized between blinded and nonblinded groups. The blinded participants were informed that we were testing the reliability of a new device for body posture assessment and these participants did not receive any information about physical activity. In contrast, the nonblinded participants were informed that the device was an accelerometer that assessed physical activity levels and patterns. The participants were instructed to wear the accelerometer for 4 consecutive days (2 school days and 2 school-free days). RESULTS:Missing data led to the exclusion of 2 participants assigned to the blinded group. When data from the blinded group were compared with these from the nonblinded group, no differences were found in the duration of any of the following items: (i) wearing the accelerometer, (ii) total physical activity, (iii) sedentary activity, and (iv) moderate-to-vigorous activity. CONCLUSIONS:Our study shows that the awareness of wearing an accelerometer has no influence on physical activity patterns in young people. This study improves the understanding of physical activity assessment and underlines the objectivity of this method. TRIAL REGISTRATION:NCT02844101 (retrospectively registered at July 13th 2016).
journal_name
BMC Med Res Methodoljournal_title
BMC medical research methodologyauthors
Vanhelst J,Béghin L,Drumez E,Coopman S,Gottrand Fdoi
10.1186/s12874-017-0378-5subject
Has Abstractpub_date
2017-07-11 00:00:00pages
99issue
1issn
1471-2288pii
10.1186/s12874-017-0378-5journal_volume
17pub_type
杂志文章,随机对照试验abstract：BACKGROUND:Although a variety of instruments are available that capture stress experience, the assessment of chronic stress has been hindered by the lack of economical screening instruments. Recently, an English-language version of the Trier Inventory for Chronic Stress (TICS-EN) consisting of 57 items according to a s...
journal_title：BMC medical research methodology
pub_type： 杂志文章
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abstract：BACKGROUND:In recent months, multiple efforts have sought to characterize COVID-19 social distancing policy responses. These efforts have used various coding frameworks, but many have relied on coding methodologies that may not adequately describe the gradient in social distancing policies as states "re-open." METHODS...
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pub_type： 杂志文章
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更新日期：2020-12-08 00:00:00
abstract：BACKGROUND:The effectiveness of multiple innovative recruitment strategies for enrolling Black/African American participants to the Adventist Health Study-2 (AHS-2) is described. The study's focus is diet and breast, prostate and colon cancer. METHODS:Promotions centered on trust, relationship building and incentives ...
journal_title：BMC medical research methodology
pub_type： 杂志文章
doi：10.1186/1471-2288-14-46
更新日期：2014-04-03 00:00:00
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journal_title：BMC medical research methodology
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更新日期：2012-10-22 00:00:00
abstract：BACKGROUND:Technical advances following the Human Genome Project revealed that high-quality and -quantity DNA may be obtained from whole saliva samples. However, usability of previously collected samples and the effects of environmental conditions on the samples during collection have not been assessed in detail. In fi...
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journal_title：BMC medical research methodology
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journal_title：BMC medical research methodology
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abstract：BACKGROUND:Diagnostic problems in clinical trials are sometimes ordinal. For example, colon tumor staging was performed according to the TNM classification. However, clinical data are limited by markedly small sample sizes in some stage. METHODS:We propose a distribution-free test for detecting ordered alternatives in...
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更新日期：2013-12-05 00:00:00
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更新日期：2006-09-13 00:00:00
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pub_type： 杂志文章
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更新日期：2015-03-12 00:00:00
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更新日期：2010-06-14 00:00:00
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pub_type： 杂志文章
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更新日期：2016-03-16 00:00:00
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更新日期：2015-01-05 00:00:00
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更新日期：2011-05-11 00:00:00
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更新日期：2016-07-08 00:00:00
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更新日期：2019-08-14 00:00:00
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更新日期：2005-02-07 00:00:00
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更新日期：2016-06-08 00:00:00
abstract：BACKGROUND:Greater transparency, including sharing of patient-level data for further research, is an increasingly important topic for organisations who sponsor, fund and conduct clinical trials. This is a major paradigm shift with the aim of maximising the value of patient-level data from clinical trials for the benefi...
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pub_type： 信件
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更新日期：2016-07-08 00:00:00
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pub_type： 信件,评审
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更新日期：2008-03-27 00:00:00
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pub_type： 杂志文章
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更新日期：2018-10-04 00:00:00
