How this calculator works
Capacity ratios, ventilated patients and two different waiting-time measures enter the regression equation. Times are converted to hours. Use the definitions in the original study; a current longest waiting-room wait is not the last bedded patient's door-to-bed time. The raw score is retained without clamping to 0 or 200. The result is an estimate for information only and is not medical advice.
Formula
NEDOCS = -20 + 85.8(P/B_ED) + 600(A/B_hospital) + 13.4V + 0.93T_admit + 5.64T_bed. P is the ED treatment-space census including overflow, A admitted patients still in ED, V ventilated patients, and T values are hours.
Worked example
40 patients, 40 ED beds, 400 hospital beds, 10 admitted patients, one ventilated patient, a 6-hour longest admitted stay and 1-hour last door-to-bed wait give -20 + 85.8 + 15 + 13.4 + 5.58 + 5.64 = 105.42.
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Frequently asked questions
Which waiting time has coefficient 5.64?
The door-to-bed wait of the last patient moved to a treatment bed. The longest ED stay among admitted patients uses 0.93.
Should I enter all critical patients as ventilators?
No. This implementation uses the mechanical-ventilator variable in the published equation. A local substitute changes the model.
Does this predict my personal wait?
No. It describes department crowding and was developed in academic emergency departments. Local operations affect its usefulness.