The association between sleep disturbances and depression among firefighters: Emotion dysregulation as an explanatory factor
Open accessAbstract
Study objectives To investigate emotion regulation difficulties in association with self-reported insomnia symptoms, nightmares, and depression symptoms in a sample of current and retired firefighters.Methods A total of 880 current and retired United States firefighters completed a web-based survey of firefighter behavioral health. Self-report measures included the Center for Epidemiologic Studies Depression Scale, Insomnia Severity Index, PTSD Checklist, and Difficulties in Emotion Regulation Scale.Results A notable portion of participants reported clinically significant depression symptoms (39.6%) and insomnia symptoms (52.7%), as well as nightmare problems (19.2%), each of which demonstrated a strong association with emotion regulation difficulties (rs = 0.56-0.80). Bootstrapped mediation analyses revealed that the indirect effects of overall emotion regulation difficulties were significant both for the relationship between insomnia and depression (95% CI: 0.385-0.566) and nightmares and depression (95% CI: 1.445-2.365). Limited access to emotion regulation strategies emerged as the strongest, significant indirect effect for both relationships (insomnia 95% CI: 0.136-0.335; nightmares 95% CI: 0.887-1.931).Conclusions Findings extend previous affective neuroscience research by providing evidence that insomnia and nightmares may influence depression symptoms specifically through the pathway of explicit emotion regulation difficulties. Sleep disturbances may impair the ability to access and leverage emotion regulation strategies effectively, thus conferring risk for negative affect and depression.
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Mental health conditions common in firefighters include PTSD, depression, anxiety, and substance abuse, which may cause a greater risk for suicidal thoughts and attempts.
“Mental health conditions common in firefighters include post-traumatic stress disorder (PTSD), depression, anxiety, and substance abuse which may cause a greater risk for suicidal thoughts and attempts [7,29,30,31].”
From The Cyclical Battle of Insomnia and Mental Health Impairment in Firefighters: A Narrative Review (2024) · cites this paper as [30]
The Introduction (page unavailable) says firefighters are at elevated risk for depression, and the study reports high rates of depressive symptoms. It links suicidal ideation and behaviors to nightmares and insomnia, not to the listed mental health conditions. The cited paper does not establish that PTSD, anxiety, and substance abuse are common in firefighters or that those conditions increase their risk of suicidal thoughts and attempts. (LLM, conf=0.87)
Experimental — accuracy not yet measuredEstimates of depression prevalence in firefighter populations are significantly higher than the general population, for example 40%.
“A large study estimates the 12-month depression prevalence to be between 5.5 and 6.0% in the general population [57] where estimates are significantly higher in firefighter populations (e.g., 40% [30]).”
From The Cyclical Battle of Insomnia and Mental Health Impairment in Firefighters: A Narrative Review (2024) · cites this paper as [30]
The Results (Descriptive Statistics; page unavailable) report that 39.6% of the 880 firefighters surveyed had clinically significant depression symptoms, supporting the approximate 40% figure. The paper does not establish a 40% prevalence of diagnosed depression in firefighter populations or test whether it is significantly higher than general-population prevalence; Limitations and Future Directions notes that the convenience sample may limit generalizability. (LLM, conf=0.88)
Experimental — accuracy not yet measuredIndividuals with significant mental health symptoms are at an increased risk of encountering negative emotional states and are less equipped to effectively cope with them, leading to decreased sleep quality and insomnia.
“Thus, individuals are at an increased risk of encountering negative emotional states and are less equipped to effectively cope with them, leading to decreased sleep quality and insomnia [30].”
From The Cyclical Battle of Insomnia and Mental Health Impairment in Firefighters: A Narrative Review (2024) · cites this paper as [30]
The Discussion (page not provided) suggests that depression may impair the ability to acknowledge and respond to negative emotions, subsequently affecting sleep quality. The Results (page not provided) also report an association between depression, emotion-regulation difficulties, and insomnia severity. The study examined firefighters, however, and does not establish that individuals generally encounter negative emotional states more often or that these difficulties cause insomnia. (LLM, conf=0.85)
Experimental — accuracy not yet measuredApproximately one-third of emergency responders meet criteria for other common mental health disorders such as depression, anxiety, and sleep disorders.
“approximately one-third of emergency responders meet criteria for other common mental health disorders such as depression, anxiety, and sleep disorders (1, 5, 15–18).”
From Pilot outcomes and exploration of treatment mechanisms using a culturally adapted version of the unified protocol for transdiagnostic treatment of emotional disorders to improve mental health symptoms, alcohol misuse, functional outcomes, and sleep quality in emergency responders (2025) · cites this paper as [17]
The Results (Descriptive Statistics; page unavailable) report clinically significant depression symptoms in 39.6% and insomnia symptoms in 52.7% of the firefighter sample. The paper does not establish that approximately one-third of emergency responders meet diagnostic criteria for depression, anxiety, and sleep disorders: it studied firefighters, reported symptoms rather than diagnoses, and did not report an anxiety-disorder rate. (LLM, conf=0.88)
Experimental — accuracy not yet measuredIn subsequent studies with fire fighters, difficulties in emotion regulation accounted for the link between depression and insomnia and were linked with PTSD symptom severity, sleep difficulties, and alcohol use.
“In subsequent studies with fire fighters, difficulties in emotion regulation accounted for the link between depression and insomnia and were linked with PTSD symptom severity, sleep difficulties, and alcohol use (16, 17, 57–59).”
From Pilot outcomes and exploration of treatment mechanisms using a culturally adapted version of the unified protocol for transdiagnostic treatment of emotional disorders to improve mental health symptoms, alcohol misuse, functional outcomes, and sleep quality in emergency responders (2025) · cites this paper as [17]
The Abstract reports significant indirect effects of emotion regulation difficulties on the insomnia–depression relationship in current and retired firefighters, and an association with sleep difficulties. The cited paper does not report a link between emotion regulation difficulties and PTSD symptom severity or alcohol use; those parts of the sentence are not supported by this source. (LLM, conf=0.86)
Experimental — accuracy not yet measured
In a study of 880 current and retired United States firefighters, 52.7% reported clinically significant insomnia symptoms.
“In a large study by Horn et al. [30], 880 current and retired United States firefighters completed a web-based ISI and 52.7% reported clinically significant insomnia symptoms with 19.2% reporting nightmare problems.”
From The Cyclical Battle of Insomnia and Mental Health Impairment in Firefighters: A Narrative Review (2024) · cites this paper as [30]
In the same study of 880 current and retired United States firefighters, 19.2% reported nightmare problems.
“In a large study by Horn et al. [30], 880 current and retired United States firefighters completed a web-based ISI and 52.7% reported clinically significant insomnia symptoms with 19.2% reporting nightmare problems.”
From The Cyclical Battle of Insomnia and Mental Health Impairment in Firefighters: A Narrative Review (2024) · cites this paper as [30]
In a study of 880 United States firefighters, 39.6% had clinically significant symptoms of depression.
“Similarly, Horn et al. [30] assessed 880 United States firefighters with cross-sectional surveys and found that 39.6% had clinically significant symptoms of depression, 52.7% had insomnia symptoms, and 19.2% had nightmares; they suggested that insomnia may increase the risk for depression through the impairment of emotional regulation (described below).”
From The Cyclical Battle of Insomnia and Mental Health Impairment in Firefighters: A Narrative Review (2024) · cites this paper as [30]
The 69.2% rate of below adequate sleep quality is consistent with rates found among Chinese and Iranian (69.9%) and U.S. firefighters (66%).
“The current results indicated 69.2% of participants reported having below adequate sleep quality, a finding consistent with that found among Chinese and Iranian (69.9%) [27] and U.S. firefighters (66%) [41]”
From Mental Health of Canadian Firefighters: The Impact of Sleep (2021) · cites this paper as [41]
Disordered sleep increases a person's risk of suicide, symptoms of major depressive disorder, cardiovascular disease, diabetes, and decreases cognitive functioning.
“Disordered sleep increases a person’s risk of suicide, symptoms of major depressive disorder, cardiovascular disease, diabetes, and decreases cognitive functioning [41,42,43].”
From Mental Health of Canadian Firefighters: The Impact of Sleep (2021) · cites this paper as [41]
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“…of emotional expression, is generally viewed as a maladaptive response-focused strategy (Chen et al., 2016; Chen et al., 2019), often associated to psychological distress and psychopathology symptoms (Aldao et al., 2010; Hom et al., 2016), our data suggest it could have a positive effect on SWB.”
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Billings, J. M. (2021) · Journal of Clinical Sleep Medicine · doi:10.5664/jcsm.9566 · Cited by 19 · see citing works
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“Our findings were consistent with previous studies in clinical patients (43) and normal population (18, 19).”
BackgroundResultShort, N. A., Norr, A. M., Mathes, B. M., Oglesby, M. E., & Schmidt, N. B. (2016) · Cognitive Therapy and Research · doi:10.1007/s10608-016-9787-8 · Cited by 18 · see citing works
“Additionally, a lack of emotion regulation strategies has been associated with depression (Ehring et al. 2008; Hom et al. 2015), which fits with the presentation of numbing symptoms, which are often similar to symptoms of depression (e.g., loss of interest in previously pleasurable activities,…”
BackgroundHuang, J., Li, X. S., & An, Y. (2020) · International Archives of Occupational and Environmental Health · doi:10.1007/s00420-020-01571-0 · Cited by 17 · see citing works
Increasing research productivity and professional development in psychology with a writing retreat.
Stanley, I. H., Hom, M. A., Chu, C., & Joiner, T. E. (2017) · Scholarship of Teaching and Learning in Psychology · doi:10.1037/stl0000089 · Cited by 17 · see citing works
“1 The other manuscripts were published in top-tier journals such as Journal of Clinical Sleep Medicine (Hom et al., 2016), Assessment (Rogers et al.”
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“Importantly, rates of depression appear to be elevated among firefighters [22,23], making depression a theoretically relevant construct to consider in examining suicide risk among this population.”
Self-citationYang, X., Liu, Z., Liu, S., Jia, C.-X., & Liu, X. (2021) · Journal of Affective Disorders · doi:10.1016/j.jad.2021.09.072 · Cited by 16 · see citing works
Personality and insomnia symptoms in older adults: the Baltimore Longitudinal Study of Aging
Rojo‐Wissar, D. M., Wanigatunga, A. A., Simonsick, E. M., Terracciano, A., Wu, M. N., Zipunnikov, V. M., Schrack, J. A., Hossain, S. A., Ferrucci, L., Costa, P. T., et al. (2021) · SLEEP · doi:10.1093/sleep/zsab082 · Cited by 16 · see citing works
“Removal of sleep-related items from depression scales when assessing associations between depressive symptoms and sleep is common practice, especially when sleep is measured by self-report [34, 35].”
BackgroundPark, S., Hong, H., Kim, R. Y., Ma, J., Lee, S. L., Ha, E., Yoon, S. J., & Kim, J. (2021) · Nature and Science of Sleep · doi:10.2147/nss.s312671 · Cited by 15 · see citing works
“Prevalence of insomnia symptoms has consistently been reported as approximately 50% among firefighters.(1,2) Considering the impacts of sleep problems on cognitive dysfunctions, which can be directly associated with higher risks of workplace injuries and poor health outcomes, sleep problems and related brain alteratio…”
BackgroundLeonard, S. J., & Vujanovic, A. A. (2022) · Behavior Modification · doi:10.1177/01454455211002105 · Cited by 15 · see citing works
“The positive association between PTSD symptom severity and ERD has been well-established in the literature, including among firefighter populations (Bartlett et al., 2019a; Boden et al., 2013; Hom et al., 2016).”
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Mental Health Among Firefighters
DeMoulin, D., Jacobs, S., Nam, Y.-S., Harding, A. B., Moskowitz, A. F., Shi, Y., & Kim, H. S. (2022) · Journal of Occupational and Environmental Medicine · doi:10.1097/jom.0000000000002680 · Cited by 15 · see citing works
“Rates of depression in firefighters have also been reported to vary widely, with studies finding prevalence rates between 11% and 40%.(8,9) Sleep disturbances are common among firefighters, with multiple studies reporting rates of insomnia or sleep disturbances greater than 50%.”
BackgroundUnderstanding mental health among military veterans in the fire service
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Alcohol use and mental health symptoms in female firefighter recruits
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“Depression [3], post-traumatic stress disorder (PTSD) [4] and substance use disorders (SUDs) [5], particularly, alcohol use disorder (AUD), are prevalent behavioural health concerns facing firefighters, due in part to repeated trauma exposure and occupational stress [1].”
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Sleep Patterns of Firefighters with Shift Working Schedules in Seoul Metropolitan Area
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A New Model for Optimizing Firefighter Human Performance
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“Previous research has shown that firefighters are at an elevated risk of developing sleep disorders and depression (2,14,37,50).”
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The Role of Emotion Regulation Difficulties in the Relation Between Insomnia and Depressive Symptoms
Predatu, R., Voinescu, B., & David, D. O. (2020) · International Journal of Behavioral Medicine · doi:10.1007/s12529-020-09903-7 · Cited by 11 · see citing works
“While previous studies have tested the indirect association between poor sleep and depressive symptoms via ER difficulties in clinical and non-clinical samples [22, 32, 33], no study has focused specifically on individuals with possible insomnia disorder.”
BackgroundSerrano, D. M., Rufino, K. A., Tran, J. K., & Vujanovic, A. A. (2021) · Archives of Suicide Research · doi:10.1080/13811118.2021.1982093 · Cited by 11 · see citing works
Qiao, X., Shi, X., Chen, X., & Ya, Z. (2023) · Journal of Affective Disorders · doi:10.1016/j.jad.2023.07.108 · Cited by 10 · see citing works
Dolan, M., Slavish, D. C., Weiss, N. H., & Contractor, A. A. (2023) · The Journal of Nervous and Mental Disease · doi:10.1097/nmd.0000000000001631 · Cited by 9 · see citing works
“, difficulty accessing effective emotion regulation skills and lack of emotional clarity) significantly mediate associations between sleep disturbances and distress (e.g., depression; Hom et al., 2016).”
BackgroundSuicide mortality among firefighters: Results from a large, urban fire department
Stanley, I. H., Hom, M. A., & Joiner, T. E. (2016) · American Journal of Industrial Medicine · doi:10.1002/ajim.22587 · Cited by 9 · see citing works
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Examining Physical and Sexual Abuse Histories as Correlates of Suicide Risk Among Firefighters
Hom, M. A., Matheny, N. L., Stanley, I. H., Rogers, M. L., Cougle, J. R., & Joiner, T. E. (2017) · Journal of Traumatic Stress · doi:10.1002/jts.22230 · Cited by 9 · see citing works
Self-citationThe Cyclical Battle of Insomnia and Mental Health Impairment in Firefighters: A Narrative Review
Holland-Winkler, A. M., Greene, D. R., & Oberther, T. J. (2024) · Journal of Clinical Medicine · doi:10.3390/jcm13082169 · Cited by 9 · see citing works
The contribution of transdiagnostic vulnerability factors in patients with chronic insomnia
Habibi Asgarabad, M., Doos Ali Vand, H., Salehi Yegaei, P., Hooman, F., Ahmadi, R., Baglioni, C., & Moradi, S. (2023) · Frontiers in Psychiatry · doi:10.3389/fpsyt.2023.1162729 · Cited by 10 · see citing works
Messman, B., Jin, L., Slavish, D. C., AlGhraibeh, A. M. A., Aljomaa, S. S., & Contractor, A. A. (2023) · Journal of Affective Disorders · doi:10.1016/j.jad.2022.12.125 · Cited by 7 · see citing works
Lin, N., Zhu, Y., Wu, X., Yang, M., Lü, F., & Deng, R. (2023) · Frontiers in Public Health · doi:10.3389/fpubh.2023.1290811 · Cited by 7 · see citing works
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A systematic review of the factors that contribute towards mental health in the fire service
Garmon-Jones, L., Hanna, P., & John, M. (2023) · International Journal of Emergency Services · doi:10.1108/ijes-02-2021-0005 · Cited by 6 · see citing works
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“A similar mediating role of emotion dysregulation has been reported in other psychiatric conditions, including psychosis (Akram et al., 2020), depression (Hom et al., 2016), and borderline personality disorder (Grove et al., 2017).”
BackgroundResultEmotions in the Fire Service: Decision-Making, Risk, and Coping
Evans, T. R. (2019) · Springer eBooks · doi:10.1007/978-3-030-14588-0_2 · Cited by 6 · see citing works
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Impact of COVID-19 Pandemic on Psychological Well-Being of Firefighters
Riccardi, E., Fontana, L., Pacella, D., Fusco, F., Marinaro, I., Costanzo, G., Vassallo, F., Triassi, M., & Iavicoli, I. (2023) · Safety and Health at Work · doi:10.1016/j.shaw.2023.06.002 · Cited by 6 · see citing works
“Other studies, reporting higher rates of depression, PTSD and risk of suicide in firefighters, considered them at greater risk of developing mental disorders as a result of being exposed to chronic stress and potentially traumatic events [26-29].”
Liu, R., Yu, H., Li, F. C., Hou, Y., & Chi, X. (2026) · Journal of Health Psychology · doi:10.1177/13591053251409900 · Cited by 3 · see citing works
“In addition, insomnia not only deprives firefighters of adequate rest, but may also exacerbate emotional fluctuations and day-time dysfunction, reducing their motivation to participate in social activities (Halsøy et al., 2021; Hom et al., 2016).”
InfluentialMoral Injury: Need and Development of a Measurement Scale for Firefighters
DeMoulin, D., Harris, J. I., McGovern, P. M., Beebe, T. J., Church, T. R., & Kim, H. S. (2023) · Current Treatment Options in Psychiatry · doi:10.1007/s40501-023-00305-6 · Cited by 3 · see citing works
“[14, 15], and suicide behaviors, including ideation (46.8%), plans (19.2%), attempts (15.5%), and non-suicidal self-injury (16.4”
InfluentialLee, H.-S., Jang, S., Shin, Y., Kim, J., & Chung, S. (2024) · Psychiatric Quarterly · doi:10.1007/s11126-024-10094-7 · Cited by 3 · see citing works
Use of Mobile Technology in Assessing Occupational Performance and Stress in Firefighters
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Screening for Comorbidity of Sleep Disorders in Career Firefighters
Hamilton, N. A., Russell, J. A., Hamadah, K., Youngren, W. A., Toon, A., Nguyen, T. A., & Joles, K. (2023) · Journal of Occupational and Environmental Medicine · doi:10.1097/jom.0000000000002993 · Cited by 4 · see citing works
“15 Given the nature of firefighting, nightmares are likely to be common in this population, comorbid with OSA and insomnia, and linked to daytime dysfunction.”
BackgroundInfluentialStanley, E. A., Mumford, E. A., Liu, W., Taylor, B. G., & Maitra, P. (2021) · Journal of Police and Criminal Psychology · doi:10.1007/s11896-021-09436-z · Cited by 4 · see citing works
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Shift schedule effects on firefighter health and fitness
Garrett, L., Harveson, A. T., & Ayars, C. L. (2023) · Work · doi:10.3233/wor-230388 · Cited by 1 · see citing works
“Anincreaseincallvolumecoupledwithother job requirements can lead to greater instances of dis-L rupted or disturbed sleep, which has been shown to affect firefighters’ mood and mental health [19].”
Leonard, S. J., Venta, A. C., Derrick, J. L., Anderson-Fletcher, E. A., & Vujanovic, A. A. (2025) · Cognitive Behaviour Therapy · doi:10.1080/16506073.2025.2540922 · Cited by 1 · see citing works
“The positive association between PTSD symptom severity and ERD has strong support in the research literature, including among first responder populations (Hom et al., 2016; Leonard & Vujanovic, 2022).”
Work-related factors and depressive symptoms in firefighters - preliminary data
Konopko, M., Jarosz, W., Bieńkowski, P., & Sienkiewicz‐Jarosz, H. (2018) · MATEC Web of Conferences · doi:10.1051/matecconf/201824700065 · Cited by 1 · see citing works
The Relationship Between Effort-Reward Imbalance and Depressive Symptoms Among Chinese Firefighters
Yu, Y., Fu, M., Yang, F., & Guo, J. (2022) · Journal of Occupational and Environmental Medicine · doi:10.1097/jom.0000000000002739 · Cited by 1 · see citing works
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“%) despite FFs completing a mental health screening upon entry into the profession [12].”
Sleep disturbances and related occupational diseases in Ukrainian firefighters
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“2 percent of French [24, 27] and 59 percent of American firefighters are dissatisfied with the quality of their sleep [4, 5, 11, 12].”
BackgroundExperimental study of sleep disturbances in firefighters of the city of Kropyvnitskiy and the region
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Toward an understanding of suicidal ideation among career firefighters
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“Firefighters also report heightened rates of depression and anxiety symptoms (Hom et al., 2016; Paulus et al., 2018; Pennington et al., 2018).”
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The Sleep Quality of Han Chinese and Tibetan Firefighters at High Altitude: A Field Study
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Evaluating the 24/72 shift schedule in the fire service: agency experiences and perceived impacts
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Emotion regulation resource profiles among employees: mental health and work outcomes
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- Authors
- Hom, M. A., Stanley, I. H., Rogers, M. L., Tzoneva, M., Bernert, R. A., & Joiner, T. E.
- Affiliations
- Florida State University (US)
- Stanford Medicine (US)
- Corresponding author
- Hom, Melanie A.
- ORCID
- Venue
- Journal of Clinical Sleep Medicine
- Published
- 2016-02-15
- Volume
- 12
- Issue
- 2
- Pages
- 235-245
- ISSN
- 1550-9389 (ISSN-L)
- 1550-9397
- PMC
- PMC4751428
- OpenAlex
- W2468578224
- Cited by
- 99
- References
- 38
- Citations by year
- 2026: 5 · 2025: 5 · 2024: 6 · 2023: 17 · 2022: 15 · 2021: 14 · 2020: 10 · 2019: 9 · 2018: 8 · 2017: 4 · 2016: 5 · 2015: 1
- FWCI
- 12.34
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of Clinical Sleep Medicine (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute of Mental Health (K23MH093490)
- Topics
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
- Health Sciences › Health Professions › Occupational Therapy › Occupational Health and Performance
- Keywords
- sleep disorders, depression, firefighters, emotion regulation, insomnia, nightmares, post-traumatic stress disorder, occupational stress, mediation, emotion regulation strategies
- MeSH terms
- Adolescent, Adult, Aged, Aged, 80 and over, Depression, Emotions, Female, Humans, Male, Middle Aged, Psychiatric Status Rating Scales, Surveys and Questionnaires, Sleep Wake Disorders, Young Adult, Firefighters
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