ClinicalTrials.gg
CompletedNCT07921706Updated Nov 6, 2026

Sleep Quality Among Dentists

An observational study in Sleep Quality and Dentistry, sponsored by TC Erciyes University. Completed at 1 site in Turkey (Türkiye). Open to participants aged 18 Years to 60 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-11-06.

Sponsored by TC Erciyes University · Observational

Updated Nov 6, 2026Newly registeredGo to Updates ↓
Study type
Observational
Model
Other
Time perspective
Cross-sectional
Enrollment
147
Ages
18 Years to 60 Years
Sex
All
01

Study summary

This cross-sectional observational study evaluates sleep quality and associated factors among 147 dentists working in university, public, and private healthcare settings in Türkiye. Data were collected using a Personal Information Form and the Pittsburgh Sleep Quality Index (PSQI). The study aims to determine the prevalence of poor sleep quality and examine its associations with practice setting, sociodemographic characteristics, occupational factors, and lifestyle behaviors using multivariable logistic regression.

Read the detailed description

Sleep quality is relevant to cognitive performance, fine motor control, and clinical decision-making in dentistry. This cross-sectional observational study was conducted between May 2024 and January 2025 among 147 dentists working in university, public, and private healthcare settings in Türkiye.

Data were collected using a structured 15-item Personal Information Form and the validated Turkish version of the Pittsburgh Sleep Quality Index (PSQI). The Personal Information Form collected information on sociodemographic characteristics, working hours, graduation year, specialist status, smoking, and daily caffeine intake calculated in milligrams.

Sleep quality was assessed using the PSQI global score. Scores greater than 5 were classified as poor sleep quality, and scores of 5 or lower were classified as good sleep quality. Binary logistic regression analyses using the enter and backward Wald methods were used to examine associations between poor sleep quality and practice setting, sociodemographic characteristics, occupational factors, and lifestyle behaviors while adjusting for other variables included in the models.

02

Conditions studied

  • Sleep Quality
  • Dentistry

Keywords

  • dentists sleep quality Pittsburgh Sleep Quality Index caffeine occupational health practice setting
03

In context

Sleep Initiation and Maintenance Disorders

2,722 studies on the registry are indexed under Sleep Initiation and Maintenance Disorders; 726 are open to participants now.

This study's enrollment of 147 is close to the median of 138 across 318 observational studies indexed under Sleep Initiation and Maintenance Disorders.

Browse Sleep Initiation and Maintenance Disorders studies →

Lead sponsor

TC Erciyes University is the lead sponsor of 349 studies on the registry; 74 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 60 Years
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

Licensed dentists actively practicing their profession in three different dental settings (university hospitals, public oral and dental health centers, and private dental clinics) in Türkiye's Kayseri province.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Active status as a licensed dentist working in one of the three designated healthcare sectors (university hospital, public oral and dental health center, or private dental clinic).
  • Voluntarily agreed to participate in the study by signing the form.

Exclusion criteria

Exclusion Criteria:

  • Regular use of any medication or dietary supplement with sleep-enhancing or sleep-regulating side effects.
  • Having a child under the age of 2 years.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Observational model
Other
Time perspective
Cross-sectional
Enrollment
147 participants (actual)
Target follow-up
1 Month
Patient registry
Yes
06

What researchers measure

Primary outcomes

  1. Pittsburgh Sleep Quality Index (PSQI) Score / Prevalence of Poor Sleep Quality

    Evaluation of sleep quality among dentists using the Pittsburgh Sleep Quality Index (PSQI), where a global score \> 5 indicates poor sleep quality, assessed across university, public, and private healthcare sectors.

    Time frame: Assessment of sleep quality over a 1-month period

07

Study locations

1 site
  • Erciyes University
    Kayseri, Kayseri 38030, Turkey (Türkiye)
08

References and documents

Publications

  • Hanks S, Cotton D, Spowart L. Leadership in Dental Practice: a Three Stage Systematic Review and Narrative Synthesis. J Dent. 2020 Nov;102:103480. doi: 10.1016/j.jdent.2020.103480. Epub 2020 Sep 19. PubMed 32961259 ↗
  • Carpi M. The Pittsburgh Sleep Quality Index: a brief review. Occup Med (Lond). 2025 Apr 4;75(1):14-15. doi: 10.1093/occmed/kqae121. No abstract available. PubMed 40190123 ↗
  • Gardiner C, Weakley J, Burke LM, Roach GD, Sargent C, Maniar N, Townshend A, Halson SL. The effect of caffeine on subsequent sleep: A systematic review and meta-analysis. Sleep Med Rev. 2023 Jun;69:101764. doi: 10.1016/j.smrv.2023.101764. Epub 2023 Feb 6. PubMed 36870101 ↗
  • Reichert CF, Deboer T, Landolt HP. Adenosine, caffeine, and sleep-wake regulation: state of the science and perspectives. J Sleep Res. 2022 Aug;31(4):e13597. doi: 10.1111/jsr.13597. Epub 2022 May 16. PubMed 35575450 ↗
  • Song KW, Choi WS, Jee HJ, Yuh CS, Kim YK, Kim L, Lee HJ, Cho CH. Correlation of occupational stress with depression, anxiety, and sleep in Korean dentists: cross-sectional study. BMC Psychiatry. 2017 Dec 12;17(1):398. doi: 10.1186/s12888-017-1568-8. PubMed 29233107 ↗
  • Yilmaz M, Kirac Y, Sahin MK. Sleep quality and related factors in a sample of Turkish healthcare workers during the COVID-19 pandemic: A cross-sectional study. Int J Clin Pract. 2021 Nov;75(11):e14813. doi: 10.1111/ijcp.14813. Epub 2021 Sep 12. PubMed 34486780 ↗
  • Buysse DJ, Reynolds CF 3rd, Monk TH, Berman SR, Kupfer DJ. The Pittsburgh Sleep Quality Index: a new instrument for psychiatric practice and research. Psychiatry Res. 1989 May;28(2):193-213. doi: 10.1016/0165-1781(89)90047-4. PubMed 2748771 ↗
  • Marklund S, Mienna CS, Wahlstrom J, Englund E, Wiesinger B. Work ability and productivity among dentists: associations with musculoskeletal pain, stress, and sleep. Int Arch Occup Environ Health. 2020 Feb;93(2):271-278. doi: 10.1007/s00420-019-01478-5. Epub 2019 Oct 25. PubMed 31654126 ↗
  • Mollayeva T, Thurairajah P, Burton K, Mollayeva S, Shapiro CM, Colantonio A. The Pittsburgh sleep quality index as a screening tool for sleep dysfunction in clinical and non-clinical samples: A systematic review and meta-analysis. Sleep Med Rev. 2016 Feb;25:52-73. doi: 10.1016/j.smrv.2015.01.009. Epub 2015 Feb 17. PubMed 26163057 ↗
  • Song KW, Kim HK. Job stress and its related factors among Korean dentists: An online survey study. Int Dent J. 2019 Dec;69(6):436-444. doi: 10.1111/idj.12513. Epub 2019 Aug 6. PubMed 31388997 ↗
  • Scullin MK, Bliwise DL. Sleep, cognition, and normal aging: integrating a half century of multidisciplinary research. Perspect Psychol Sci. 2015 Jan;10(1):97-137. doi: 10.1177/1745691614556680. PubMed 25620997 ↗
  • Li J, Vitiello MV, Gooneratne NS. Sleep in Normal Aging. Sleep Med Clin. 2018 Mar;13(1):1-11. doi: 10.1016/j.jsmc.2017.09.001. Epub 2017 Nov 21. PubMed 29412976 ↗
  • Ohayon MM, Carskadon MA, Guilleminault C, Vitiello MV. Meta-analysis of quantitative sleep parameters from childhood to old age in healthy individuals: developing normative sleep values across the human lifespan. Sleep. 2004 Nov 1;27(7):1255-73. doi: 10.1093/sleep/27.7.1255. PubMed 15586779 ↗
  • Snel J, Lorist MM. Effects of caffeine on sleep and cognition. Prog Brain Res. 2011;190:105-17. doi: 10.1016/B978-0-444-53817-8.00006-2. PubMed 21531247 ↗
  • Penolazzi B, Natale V, Leone L, Russo PM. Individual differences affecting caffeine intake. Analysis of consumption behaviours for different times of day and caffeine sources. Appetite. 2012 Jun;58(3):971-7. doi: 10.1016/j.appet.2012.02.001. Epub 2012 Feb 9. PubMed 22326679 ↗
  • Lv Q, Zhou W, Kong Y, Chen S, Xu B, Zhu F, Shen X, Qiu Z. Influencing factors of sleep disorders and sleep quality in healthcare workers during the COVID-19 pandemic: A systematic review and meta-analysis. Nurs Open. 2023 Sep;10(9):5887-5899. doi: 10.1002/nop2.1871. Epub 2023 Jun 6. PubMed 37282352 ↗
  • Myers HL, Myers LB. 'It's difficult being a dentist': stress and health in the general dental practitioner. Br Dent J. 2004 Jul 24;197(2):89-93; discussion 83; quiz 100-1. doi: 10.1038/sj.bdj.4811476. PubMed 15272347 ↗

Individual participant data

Plan to share: No

09

Timeline

1 registry update since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from May 2024 to primary completion in Jan 2025, 8 months.

How these figures are worked out, and which studies are left out of them.

Registered
Oct 9, 2026
First posted
Nov 6, 2026
StartActual
May 2, 2024
Primary completionActual
Jan 10, 2025
CompletionActual
Dec 22, 2025
Last update
Nov 6, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
Registered
First appeared on the registry. No changes since
Nov 6, 2026
Show all 1 update
  1. Nov 6, 2026
    First appeared on the registry

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT07921706
Responsible party
Haydar Albayrak (associate professor, TC Erciyes University) — Principal investigator
First posted
Nov 6, 2026
Start date
May 2, 2024
Primary completion
Jan 10, 2025
Completion
Dec 22, 2025
Last update
Nov 6, 2026

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Nov 2026. You cannot join it, but the record below documents what was studied.

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