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Assessment for the possibility of a first night effect for wrist actigraphy in adolescents
OBJECTIVES: Evidence of a ‘first night effect’ has been documented for polysomnography. The possibility of this has not been previously assessed in wrist actigraphy, yet may have important implications for the study design of future sleep research. We sought to examine potential evidence of a ‘first...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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BMJ Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5073561/ https://www.ncbi.nlm.nih.gov/pubmed/27697873 http://dx.doi.org/10.1136/bmjopen-2016-012172 |
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author | Arora, Teresa Omar, Omar M Taheri, Shahrad |
author_facet | Arora, Teresa Omar, Omar M Taheri, Shahrad |
author_sort | Arora, Teresa |
collection | PubMed |
description | OBJECTIVES: Evidence of a ‘first night effect’ has been documented for polysomnography. The possibility of this has not been previously assessed in wrist actigraphy, yet may have important implications for the study design of future sleep research. We sought to examine potential evidence of a ‘first night effect’ for wrist actigraphy in adolescents across weekdays and weekend nights for multiple sleep outcomes. DESIGN: 3-year prospective cohort study (Midlands Adolescent Schools Sleep Education Study). SETTING: 8 secondary schools in the Midlands region of the UK. PARTICIPANTS: Adolescents (aged 11–13 years at baseline) were recruited to the study and were requested to wear a wrist actigraph for 7 consecutive days/nights at baseline and then annually for 2 years during the second term of the academic year. PRIMARY OUTCOME MEASURES: We compared multiple sleep outcomes (total sleep time, wake after sleep onset, sleep efficiency, sleep onset latency, number of awakenings, length of awakenings, sleep onset time) when the device was worn on a weekday and weekend and compared these to other nights to identify possible evidence of a ‘first night effect’ for wrist actigraphy. RESULTS: No significant differences were found between any sleep outcomes when the first night of wrist actigraphy was on a weekday compared with other weekdays. When the first night was measured on a weekend (Friday), average total sleep time was significantly greater (486±5 min) compared with the second night (Saturday; 469±6 min), p=0.01. CONCLUSIONS: We found no evidence to support a ‘first night effect’ for wrist actigraphy in our adolescent sample. The first night of actigraphy data should not be disregarded in future studies that deploy this technique to measure sleep over prolonged time periods. |
format | Online Article Text |
id | pubmed-5073561 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | BMJ Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-50735612016-11-07 Assessment for the possibility of a first night effect for wrist actigraphy in adolescents Arora, Teresa Omar, Omar M Taheri, Shahrad BMJ Open Research Methods OBJECTIVES: Evidence of a ‘first night effect’ has been documented for polysomnography. The possibility of this has not been previously assessed in wrist actigraphy, yet may have important implications for the study design of future sleep research. We sought to examine potential evidence of a ‘first night effect’ for wrist actigraphy in adolescents across weekdays and weekend nights for multiple sleep outcomes. DESIGN: 3-year prospective cohort study (Midlands Adolescent Schools Sleep Education Study). SETTING: 8 secondary schools in the Midlands region of the UK. PARTICIPANTS: Adolescents (aged 11–13 years at baseline) were recruited to the study and were requested to wear a wrist actigraph for 7 consecutive days/nights at baseline and then annually for 2 years during the second term of the academic year. PRIMARY OUTCOME MEASURES: We compared multiple sleep outcomes (total sleep time, wake after sleep onset, sleep efficiency, sleep onset latency, number of awakenings, length of awakenings, sleep onset time) when the device was worn on a weekday and weekend and compared these to other nights to identify possible evidence of a ‘first night effect’ for wrist actigraphy. RESULTS: No significant differences were found between any sleep outcomes when the first night of wrist actigraphy was on a weekday compared with other weekdays. When the first night was measured on a weekend (Friday), average total sleep time was significantly greater (486±5 min) compared with the second night (Saturday; 469±6 min), p=0.01. CONCLUSIONS: We found no evidence to support a ‘first night effect’ for wrist actigraphy in our adolescent sample. The first night of actigraphy data should not be disregarded in future studies that deploy this technique to measure sleep over prolonged time periods. BMJ Publishing Group 2016-10-03 /pmc/articles/PMC5073561/ /pubmed/27697873 http://dx.doi.org/10.1136/bmjopen-2016-012172 Text en Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/ This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/ |
spellingShingle | Research Methods Arora, Teresa Omar, Omar M Taheri, Shahrad Assessment for the possibility of a first night effect for wrist actigraphy in adolescents |
title | Assessment for the possibility of a first night effect for wrist actigraphy in adolescents |
title_full | Assessment for the possibility of a first night effect for wrist actigraphy in adolescents |
title_fullStr | Assessment for the possibility of a first night effect for wrist actigraphy in adolescents |
title_full_unstemmed | Assessment for the possibility of a first night effect for wrist actigraphy in adolescents |
title_short | Assessment for the possibility of a first night effect for wrist actigraphy in adolescents |
title_sort | assessment for the possibility of a first night effect for wrist actigraphy in adolescents |
topic | Research Methods |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5073561/ https://www.ncbi.nlm.nih.gov/pubmed/27697873 http://dx.doi.org/10.1136/bmjopen-2016-012172 |
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