Temporal trends in emergency department volumes and crowding metrics in a western Canadian province: a population-based, administrative data study

Table 2 Summaries of hourly, facility-specific crowding metrics for all EDs and by ED category

Crowding Metric	All EDs	Regional EDs	Urban EDs	Academic/Teaching EDs
PIA-A
median [IQR]	01h30m [00h57m, 02h12m]	01h11m [00h43m, 01h51m]	01h34m [01h01m,02h14m]	01h48m [01h11m, 02h33m]
PIA-M
median [IQR]	01h23m [00h51m, 02h08m]	01h08m [00h40m, 01h50m]	01h27m [00h55m, 02h10m]	01h36m [00h59m, 02h28m]
PIA-90
median [IQR]	02h13m [01h19m, 03h20m]	01h37m [00h55m, 02h33m]	02h18m [01h26m, 03h20m]	02h59m [01h54m, 04h17m]
LOS-A for patients discharged
median [IQR]	03h44m [02h37m, 05h08m]	02h47m [01h57m, 03h51m]	03h53m [02h54m, 05h06m]	05h08m [03h56m, 06h44m]
LOS-M for patients discharged
Median [IQR]	03h21m [02h18m, 04h40m]	02h31m [01h41m, 03h33m]	03h29m [02h32m, 04h38m]	04h36m [03h24m, 06h10m]
LOS-90 for patients discharged
median [IQR]	05h26m [03h39m, 07h42m]	03h59m [02h41m, 05h36m]	05h40m [04h03m, 07h38m]	07h43m [05h46m, 10h12m]
LOSA for patients admitted
median [IQR]	10h38m [06h40m, 17h06m]	06h45m [04h29m, 12 h07m]	12h55m [08h16m, 20h39m]	11h10m [07h49m, 16h03m]
LOSM for patients admitted
median [IQR]	10h08m [06h28m, 16h56m]	06h42m [04h27m, 11h45m]	12h29m [08h00m, 20h43m]	10h30m [07h21m, 15h39m]
LOS-90 patients admitted
median [IQR]	12h19m [07h17m, 21h08m]	07h12m [04h42m, 13h22m]	15h02m [09h04m, 00h06m]	13h51m [09h14m, 21h02m]
Percent LWBS (Day aggregated)
median [IQR]	3.4 [1.7,5.7]	3.4 [1.6,5.7]	3.2 [1.6,5.4]	3.7 [1.8,6.4]
Percent LAMA (Day aggregated)
median [IQR]	0.8 [0.0,16.]	0.6 [0.0,1.2]	0.8 [0.0,1.6]	1.1 [0.5,2.0]

IQR 25th percentile, 75th percentile, LAMA Left against medical advice, LOS Length of stay, LWBS Left without being seen, SD Standard deviation, PIA-A hourly, facility specific average time to physician initial assessment, PIA-M hourly, facility specific median time to physician initial assessment, PIA-90 hourly, facility specific 90th percentile of time to physician initial assessment, LOS-A hourly, facility specific average LOS, LOS-M hourly, facility specific median LOS, LOS-90 hourly, facility specific 90th percentile of LOS

ISSN: 1472-6963