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Exploring the link between grit and excessive daytime sleepiness: a study in a population sample.
Jae Rim Kim1, Dana Oh1, Jee-Eun Yoon2
1Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea.
Sleep & Breathing = Schlaf & Atmung
|July 11, 2025
Summary
Higher grit, specifically consistency of interest, is linked to lower rates of excessive daytime sleepiness (EDS). This suggests grit may be a target for interventions to combat sleepiness and improve public safety.
Area of Science:
- Sleep Medicine
- Psychology
Background:
- Excessive daytime sleepiness (EDS) impacts health and safety.
- Known EDS contributors include snoring and depression.
- The role of grit in EDS is largely unexplored.
Purpose of the Study:
- To investigate the association between grit and EDS in Korean adults.
- To examine the specific roles of perseverance of effort (PE) and consistency of interest (CI) in EDS.
- To identify potential new avenues for EDS intervention.
Main Methods:
- Nationwide cross-sectional survey with 2,356 participants (2018).
- Assessed EDS using the Epworth Sleepiness Scale.
- Measured grit using the Short Grit Scale (PE and CI subscales).
- Utilized multivariable logistic regression analysis.
Main Results:
- EDS prevalence was 15.2%.
- Lower overall grit and CI scores were observed in participants with EDS.
- Higher grit scores were significantly associated with lower odds of EDS (OR 0.35).
- This association remained significant in subgroups with depression and snoring.
- No significant association was found between PE and EDS.
Conclusions:
- Intrinsic motivation (CI) is inversely associated with EDS.
- Nurturing grit may be a viable strategy for addressing EDS.
- Further research into grit-based interventions for EDS is warranted.
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