Table 1.

Characteristics of 3276 Emergency Department (ED) shifts

Variable	Median	Range, interquartile range
Operations markers
Patient census	385	193–705, 293–459
n of pending admissions at shift start	47	0–110, 35–59
Proportion left without being seen	0.109	0.006–0.304, 0.078–0.141
Median length of stay (minutes)	236	84–1504, 204–272
Patient demographics and acuity
Proportion of females	0.310	0.164–0.444, 0.270–0.342
Proportion of Qatari nationals	0.2	0.076–0.374, 0.158–0.238
Proportion of pediatric (age < 18) cases	0.087	0.010–0.211, 0.056–0.129
Proportion of geriatric (age > 64) cases	0.040	0.004–0.083, 0.032–0.048
Proportion of lowest-acuity triage scoresa	46.4	12.3–79.0, 41.4–56.2
Total number of on-duty physicians
All grades combined	25	10–35, 23–27
Consultants	6	0–15, 4–7
Specialists	11	0–22, 9–14
Fellows	6	0–19, 4–8
Residents	1	0–16, 0–3

^aTriage scores 4 or 5 on a five-point scale