Table 5

ED operational metrics before and after front-end process implementation

Before implementationAfter implementationMean change (95% CI) (each ED as matched pair)
Median arrival-to-provider time (min)−25 (−37 to −13)
 Median (95% CI)60 (37 to 71)31 (21 to 42)
 IQR41–7722–39
 Range16–8010–54
Median ED length of stay for all patients (min)−36 (−59 to −12)
 Median (95% CI)298 (260 to 341)261 (222 to 307)
 IQR243–350225–312
 Range230–377180–347
Overall left before being seen rate (%)−1.2 (−1.8 to −0.6)
 Median (95% CI)2.6 (1.4 to 7.0)1.4 (0.7 to 6.1)
 IQR1.0–3.50.5–1.6
 Range0.7–8.60.4–6.8
  • ED, emergency department.