Skip to main content
OpenTrials
Completed

NCT Number: NCT07315269

The Relationship Between Power Sleep and Sleep Quality, Depression, and Stress Levels in University Students

This prospective cohort study aims to evaluate the effects of daily daytime power napping on sleep quality, depression, and perceived stress levels among healthy individuals. The study particularly investigates whether these effects differ between daytime workers and shift workers. Participants are required to practice a 15-20 minute (maximum 30 minutes) power nap daily for a period of six weeks. Changes in psychological and sleep parameters are assessed using the Jenkins Sleep Scale (JSS), Beck Depression Scale (BDS), and Perceived Stress Scale (PSS) before and after the intervention.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Sleep Quality Behavior Behavioral Symptoms Depression Disorders Dyssomnias Mental Disorders Nervous System Diseases Occupational Diseases Occupational Stress Personal Satisfaction Psychological Well-Being Sleep Disorders, Intrinsic Sleep Initiation and Maintenance Disorders Sleep Wake Disorders Stress, Psychological

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Dicle University

Diyarbakır, Diyarbakar, 21000, Turkey (Türkiye)

About this study

The study was conducted with 40 healthy volunteers (including 29 daytime workers and 11 shift workers) to analyze the impact of daytime napping on mental health and sleep hygiene.

Methodology: At the beginning of the study, participants' demographic information was collected, and baseline assessments were performed using the Jenkins Sleep Scale (JSS) for sleep patterns, the Beck Depression Scale (BDS) for depressive symptoms, and the Perceived Stress Scale (PSS) for stress levels.

Intervention: Participants were instructed to take a short nap (power nap) between 1:00 PM and 3:00 PM for daytime workers, or at suitable intervals for shift workers, every day for 6 weeks. The duration of the nap was strictly limited to 15-30 minutes to avoid sleep inertia.

Evaluation: After the 6-week intervention period, the same scales (JSS, BDS, and PSS) were administered as a post-test. The data were analyzed to compare the pre-test and post-test scores, with a focus on the differences in outcomes between different work schedules (shift vs. daytime). The study adheres to the principles of the Declaration of Helsinki and was approved by the Dicle University Social Sciences and Humanities Ethics Committee.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Being a healthy volunteer.
  • Being actively employed as either a daytime worker or a shift worker.
  • Providing written informed consent to participate in the study.
  • Willingness to adhere to a 6-week daytime power napping protocol.

Exclusion criteria

  • Presence of diagnosed severe sleep disorders (e.g., severe insomnia or sleep apnea) that might interfere with the study protocol.
  • Inability to complete the 6-week power napping intervention.
  • Missing or incomplete psychological scale data at baseline or post-test.
  • Failure to perform the power nap as instructed during the study period.

Treatment and study plan

Daytime Power Napping

Behavioral

The duration, effectiveness, and method of intervention in this area should be clearly stated:

Duration Per Session: Each nap is planned to be between 15-20 minutes, and limited to a maximum of 30 minutes to prevent sleepiness (sleep inertia).

Total Duration: The intervention is a 6-week process. Target Group: 40 healthy volunteers (including day and shift workers). Goal: To enhance the privacy of sleep in daily life, reduce virus spread, and decrease stress.

Primary outcomes

  1. Change in Sleep Quality as measured by the Jenkins Sleep Scale

    Time frame: Baseline (Day 0) and at the end of the 6-week intervention period.

    The JSS is a 4-item scale used to assess sleep problems, specifically focusing on difficulties falling asleep and maintaining sleep quality. Each item is scored on a 6-point Likert scale (0-20 total range). Higher scores indicate more sleep problems.

Secondary outcomes

  1. Change in Depressive Symptoms as measured by the Beck Depression Scale (BDS/BDI)

    Time frame: Baseline (Day 0) and at the end of the 6-week intervention period.

    The BDS consists of 21 questions designed to assess cognitive, somatic, and emotional symptoms of depression. Scores range from 0 to 63. Higher scores indicate more severe depressive symptoms.

  2. Change in Perceived Stress as measured by the Perceived Stress Scale (PSS).

    Time frame: Baseline (Day 0) and at the end of the 6-week intervention period.

    The 10-item version of the PSS measures an individual's perception of stress in their current situation. It includes two sub-dimensions: "perception of inadequate self-efficacy" and "perception of stress discomfort". Higher scores indicate a higher level of perceived stress.

Sponsors and collaborators

Lead sponsor

okkes zortuk

Other

Registry information

Official study title

Evaluation of the Effect of Daytime Power Napping on Depression, Stress and Sleep According to Working Method: Prospective Cohort Study

Important dates

Study start
2023
Primary completion
2024
Study completion
2024
First posted
Jan 2, 2026
Registry last updated
Jan 2, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.