Effect of Nap on Daytime Functioning in Primary School Students

Not Applicable

Completed

• Conditions: Sleep Deprivation
• Interventions: Behavioral: Nap

• Registration Number: NCT04270539
• Lead Sponsor: The University of Hong Kong

Brief Summary

Previous studies showed that insufficient sleep has a negative impact on children's physical and psychological health. Napping was found to decrease sleepiness and improve daytime functioning in adults and adolescents. The effects of napping on children, however, is unknown. The current study aims to test the effects of short daytime classroom naps on daytime functioning and behaviour in elementary school children.

Detailed Description

This study is an interventional study testing the effects of short daytime nap on children's cognitive functioning and daytime behaviour. Primary school children will be randomised to either experimental (nap) or control group (no nap) by class. Measurements include parent-report questionnaires, children's self-report questionnaires, and cognitive tasks.

Study Timeline

• Study Start: 2018-12-01
• Study First Submitted: 2020-02-03
• Study First Submitted QC: 2020-02-13
• Study First Posted: 2020-02-17
• Primary Completion: 2020-05-01
• Study Completion: 2020-12-01
• Status Verified: 2021-04
• Last Update Submitted: 2021-04-24
• Last Update Posted: 2021-04-27

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 654

Inclusion Criteria

• Children from grade 1, 2, 3, 5, and 6

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Exclusion Criteria

• Children ages 4 or younger, ages 15 or older

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Experimental Group (nap)	Nap	The experimental group will be allowed to take a brief nap daily on school days during the study period.

Primary Outcome Measures

Name	Time	Method
Change in objectively measured cognitive performance (working memory)	Day 1 (before napping), Day 1 (after napping), two weeks and two months after intervention	accuracy in match to sample task
Change in objectively measured cognitive performance (inhibitory control)	Day 1 (before napping), Day 1 (after napping), two weeks and two months after intervention	reaction time (ms) in Go-no go task
Change in objectively measured cognitive performance (sustained attention)	Day 1 (before napping), Day 1 (after napping), two weeks and two months after intervention	Lapses defined by reaction time (RT) more than 500ms in psychomotor vigilance task

Secondary Outcome Measures

Name	Time	Method
Change in daytime behaviour (emotional & behavioural problems)	Day 1 (before napping), Day 1 (after napping), two weeks and two months after intervention	Daytime behaviors as measured by Strengths and Difficulties Questionnaires (SDQ). Higher scores suggest more emotional and behavioural problems.
Change in daytime sleepiness	Day 1 (before napping), Day 1 (after napping), two weeks and two months after intervention	Daytime sleepiness as measured by Pediatric Daytime Sleepiness Scale (PDSS). Higher scores suggest more sleepiness.
Change in daytime behaviour (ADHD symptoms)	Day 1 (before napping), Day 1 (after napping), two weeks and two months after intervention	Strengths and Weakness of Attention-Deficit/ Hyperactivity-symptoms and Normal-behaviors (SWAN). Higher scores suggest more severe ADHD symptoms

Trial Locations

Locations (1)

Sleep Research Clinic & Laboratory, Department of Psychology, The University of Hong Kong; 🇭🇰 Hong Kong, Hong Kong