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Table 4 Results comparing two approaches using the hospital emergency department model

From: Simulating an emergency department: the importance of modeling the interactions between physicians and delegates in a discrete event simulation

Performance measure

Value (95% CI)

Difference (SD)

Utilization**

Physician-Without interaction

23%

18%

With reaction

41%

 

Delegate-Without interaction

56%

15%

With interaction

71%

 

Time from arrival to bed (minutes)

High acuity-Without interaction

20.39 (20.06, 20.72)

1.08* (0.26)

With interaction

21.47 (21.19, 21.75)

 

Low acuity-Without interaction

68.94 (62.87, 75.01)

19.55* (1.47)

With interaction

88.49 (80.36, 96.62)

 

Patient waiting time for physician or delegate (minutes)

Physician (high acuity)-Without interaction

0.49 (0.44, 0.54)

0.53* (0.04)

With interaction

1.02 (0.96, 1.08)

 

Physician (low acuity)-Without interaction

0.56 (0.55, 0.57)

0.93* (0.02)

With interaction

1.49 (1.46, 1.52)

 

Delegate (low acuity)-Without interaction

0.15 (0.14, 0.16)

0.37* (0.01)

With interaction

0.52 (0.49, 0.55)

 

Patient time with the delegate (minutes)

Delegate (low acuity)-Without interaction

14.50 (14.5, 14.5)

10.01* (0.01)

With interaction

24.51 (24.48, 24.51)

 

Average total length of stay (minutes)

Physician (high acuity)-Without interaction

85.91 (85.15, 86.67)

0.92 (0.61)

With interaction

86.83 (85.88, 87.78)

 

Physician (low acuity)-Without interaction

118.54 (111.13, 125.78)

18.45* (1.31)

With interaction

136.99 (128.47, 145.51)

 

Delegate (low acuity)-Without interaction

114.84 (108.32, 121.36)

27.23* (1.36)

With interaction

142.07 (135.48, 148.66)

 

All low acuity patients-Without interaction

116.66 (110.49, 122.83)

23.1* (0.94)

With interaction

138.91 (130.86, 146.96)

 
  1. *statistically significant at the 5% level, **includes interaction time.
  2. CI confidence interval, SD standard deviation.