Table.

ED time in department preceding and during MPERT.^⁎

	Median TID (Hours)
Patient Categories	Pre-MPERT (# Patients)	MPERT (# Patients)	Median Difference of TID (Hours)	Ln (Mean Difference of TID)[95% CI]†
All patients (MPERT+main ED)	4.8 (1,417)	3.5 (1,931)	1.3	0.317 [0.27 to 0.36]
MPERT patients	N/A	1.8 (356)	N/A	—
All triage level II: critical	5.7 (112)	5 (110)	0.7	0.129 [–0.02 to 0.28]
All triage level III: emergency	5.8 (308)	5.3 (370)	0.4	0.029 [–0.05 to 0.11]
All triage level IV: urgent	4.9 (563)	4 (789)	0.9	0.225 [0.16 to 0.29]
All triage level V: nonurgent	4.1 (434)	2 (662)	2.1	0.627 [0.56 to 0.70]

TID, Time in department; N/A, not applicable.

^⁎MPERT was operational from May 1, 2009, at 4:00 pm until May 7, 2009, at 11:59 pm. Because data are not normally distributed, median times, rather than means, are presented. This period was compared with ED flow from April 27, 2009, at midnight until May 1, 2009, at 3:59 pm. TID: arrival to discharge home or admission to hospital. Differences in numbers between Figure 1 and the Table are due to exclusion of children being actively resuscitated (triage level I) and children who left the ED before triage from the algorithm.

^†The natural logarithm of TID is presented here. If the 95% CI of the natural logarithm crosses 0, there is no statistically significant difference in TID.