Perceived Work Demands and Emergency Department Crowding as Predictors of Objective Stress Among Emergency Physicians: A Shift-Level Approach.

Objective: To understand shift-level determinants of emergency physician (EP) burnout, relationships were tested between EP shift demands, stress, and fatigue.

Method: EP ( n = 16) were assessed over 114 shifts that occurred before and during the COVID-19 pandemic. Salivary cortisol (an indicator of stress) and self-reported fatigue were collected prior to and following each shift. An objective crowding score (National Emergency Department Overcrowding Scale) per shift was calculated. Shift demands were assessed at the end of each shift.

Results: Multilevel models revealed that shift demands, National Emergency Department Overcrowding Scale, and the pandemic were related to higher levels of end-of-shift cortisol, but not fatigue. Cortisol levels were higher for shifts with a higher number of demands, greater crowding, and during the pandemic.

Conclusions: Shift demands predicted objective indicators of stress, but not self-reported fatigue. Interventions are needed to decrease stress and shift demands to reduce EP burnout.