Table-I.

Demographic and professional characteristics of the surveyed emergency physicians

Characteristics	Number (%)
Years of practice
>15	9 (3.6%)
11-15	62 (25.1%)
6-10	115 (46.6%)
≤5	61 (24.7%)
Current professional rank
Attending	65 (26.3%)
Fellow	122 (49.4%)
Resident	60 (24.3%)
Primary training
Medicine	109 (44.1%)
Surgery	98 (39.7%)
Emergency medicine	40 (16.2%)
Male gender	175 (70.9%)
Teaching hospital	139 (56.3%)
Approximate annual ED visit volume
<50,000	50 (20.2%)
50,000-100,000	116 (47.0%)
>100,000	81 (32.8%)
Approximate monthly trauma visit volume
<500	57 (23.1%)
500-1000	52 (21.1%)
>1000	138 (55.9%)
Head CT available anytime	232 (93.9%)
Received specific training regarding radiation dose of CT	88 (35.6%)
Familiar with CCHR	103 (41.7%)
Routine apply CCHR when request of CT for patients with mild head injury	61 (24.7%)

ED, emergency department, CT, computed tomography, CCHR, Canadian Computed Tomography Head Rule