Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Meeting Abstract

Characterizing Sleep in Early-Morning Shift Workers at Risk for Shift Work Disorder


Williams,  Jonathan
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Zitting, K.-M., Gilmore, K., Elkhadem, A., Shaw, S., Deminico, M., Lockyer, B., et al. (2023). Characterizing Sleep in Early-Morning Shift Workers at Risk for Shift Work Disorder. Sleep, 46: 0614, A269-A260. doi:10.1093/sleep/zsad077.0614.

Cite as: https://hdl.handle.net/21.11116/0000-000D-400D-D

Shift work is increasingly common in our 24/7 society and can cause sleep disturbances and excessive sleepiness. Roughly 10-43% of shift workers are diagnosed with shift work disorder (SWD), characterized by excessive sleepiness accompanied by reduced sleep duration and/or insomnia. While more individuals work early morning shifts (shift start 3-6AM) compared to overnight shifts, few studies have investigated this population. The aim of this study was to characterize sleep in a population of early-morning shift workers.

We characterized sleep in early-morning shift workers (18-65yrs) from New England who were screened for a clinical trial of a wake-promoting agent. Pre-screening consisted of the Epworth Sleepiness Scale (ESS) and a Shift Work Disorder Questionnaire (SWD); screening consisted of the Pittsburg Sleep Quality Index Questionnaire Questionnaire (PSQI) ; a physical exam including an ECG, CBC, urinalysis, and comprehensive metabolic panel; a home sleep test (HST), a Monitored Wakefulness Test (MWT); a physician evaluation of their excessive sleepiness (Clinical Global Impression [CGI]); and a self-evaluation regarding how sleepiness affected their everyday life (Patient Global Impression [PGI]). Only data from consented individuals who met the initial inclusion criteria of being high risk for SWD were included in the analysis.

158 early-morning shift workers met the pre-screening criteria and began the screening process. Most worked in retail, healthcare, maintenance, or transportation, and worked five shifts (65%) and 40+ hours (72%) per week, with a duration of 8.8±1.9 hours. 41 were screened out for abnormal findings on the PE, ECG, or screening blood/urine tests; 26 were screened out for previously un-diagnosed OSA or PLMD; 4 were ineligible for other reasons; 7 were excluded after their MWT due to long sleep latency, 20 were lost to follow-up/withdrew and 60 completed screening and met inclusion criteria. Their average (±sd) age was 37±11 years, 45% women, PSQI score 7.5±2.7, sleep duration 5.6±1.0, ESS=16.3±3.1, CGI=4.2±0.9, PGI=3.6±1.1.

Early-morning shift workers at an increased risk for SWD report short and disturbed sleep, excessive sleepiness, and a negative impact of sleepiness on their quality of life. Many have undiagnosed OSA and PLMD.