The National Emergency Department Overcrowding Scale and Perceived Staff Workload: Evidence for Construct Validity in...

Area of Science:

• Emergency Medicine
• Healthcare Operations
• Workload Assessment

Background:

• Pediatric emergency departments (EDs) face challenges with overcrowding.
• Measuring staff workload is crucial for understanding ED operational efficiency.
• The National Emergency Department Overcrowding Scale (NEDOCS) and NASA Task Load Index (TLX) are tools used to assess these factors.

Purpose of the Study:

• To investigate the correlation between perceived staff workload (using NASA Task Load Index - TLX) and the National Emergency Department Overcrowding Scale (NEDOCS) in a pediatric ED.
• To determine if TLX can predict severe overcrowding as defined by NEDOCS.

Main Methods:

• Collected 401 staff questionnaires in a pediatric ED to assess perceived workload using the NASA Task Load Index (TLX).
• Evaluated the correlation between individual and subgroup TLX responses and NEDOCS.
• Analyzed the correlation between hourly mean TLX responses and NEDOCS.
• Developed a logistic regression model using TLX to predict "severely overcrowded" status based on NEDOCS.

Main Results:

• A poor overall correlation (R² 0.096) was found between individual TLX responses and NEDOCS.
• Subgroups like fellows (R² 0.96) and patient financial advisors (R² 0.58) showed higher correlations.
• During periods of high NEDOCS (>60), mean TLX responses correlated better (R² 0.638).
• The TLX predicted "severely overcrowded" status with an area under the curve of 0.731 in logistic regression.

Conclusions:

• NEDOCS does not strongly correlate with individual staff perceived workload in pediatric EDs.
• NEDOCS may correlate better with perceived workload during extremely busy periods or when assessed categorically.
• The TLX shows potential as a predictor for severe overcrowding events.