Discriminating between fatigue and sleepiness in the naval operational environment
Shattuck, Nita Lewis
MetadataShow full item record
To assess the similarities and differences between reported levels of fatigue and sleepiness as a consequence of working at sea. Participants: 767 crewmembers of a U.S. Navy ship. Methods: Retrospective analysis of a survey to include questions about demographics, caffeine consumption, sleep adequacy, the Epworth Sleepiness Scale (ESS), and the Fatigue Severity Scale (FSS). Results: ESS scores (8.41 ± 4.66) indicated that 32% of the participants had excessive daytime sleepiness (ESS score > 10), while approximately 7% had an ESS score of 16 or more. FSS scores (average FSS = 3.01 ± 1.37) indicated that 28% of the participants had elevated fatigue (FSS score ≥ 4). Even though ESS and FSS scores were correlated (r = 0.39), their association explained only 15% of the variability observed. In terms of behavioral and lifestyle patterns, crewmembers with elevated fatigue (FSS ≥ 4) reported getting less exercise than those reporting less fatigue. Individuals with excessive sleepiness (ESS > 10) reported higher caffeine consumption. Crewmembers with elevated fatigue and comorbid sleepiness (FSS ≥ 4 and ESS > 10) reported receiving less sleep than other crewmembers. Conclusions: These results suggest that subjective fatigue and subjective sleepiness, as measured by the FSS and ESS scales, are distinct constructs and both are consequences of working at sea. The scores on the two scales correlate differentially with behavioral and lifestyle patterns of the crewmembers.
The article of record as published may be found at http://dx.doi.org/10.1080/15402002.2016.122864
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Prevalence of musculoskeletal symptoms, excessive daytime sleepiness, and fatigue in the crew members of a U.S. Navy ship Shattuck, Nita Lewis; Matsangas, Panagiotis; Moore, John; Wegemann, Laura (Monterey, California. Naval Postgraduate School, 2015-04); NPS-OR-15-005This epidemiological, cross-sectional, questionnaire-based study has two goals. The first goal is to assess the prevalence of musculoskeletal (MSK) symptoms, fatigue levels, and use of caffeinated beverages in a sample ...
A comparison between the 3/9 and the 5/10 watchbills Shattuck, Nita Lewis; Matsangas, Panagiotis; Brown, Stephanie (Monterey, California, Naval Postgraduate School, 2015-04); NPS-OR-15-006This is the second phase of a longitudinal study comparing the fatigue levels, workload, and performance of crewmembers working on the 3-hrs on/9-hrs off (3/9) and the 5-hrs on/10-hrs off (5/10) watchstanding schedules. ...
Fatigue in Pilots of Remotely Piloted Aircraft Before and After Shift Work Adjustment Tvaryanas, Anthony P.; Macpherson, Glen D. (Aerospace Medical Association, 2009);Remotely piloted aircraft (RPA) with long endurance allow near-continuous operations, necessitating the implementation of shift work for crewmembers to provide the necessary manning of ground control stations. Shift work ...