Table 1 CT scan ordering rates by scan subtype and experimental group in the pre- and post-intervention periods

All CTs

35.7 (10.0)

40.3 (11.8)

4.13

< 0.001

33.9 (9.2)

38.9 (11.9)

3.94

0.001

Abdominal/pelvic CT

10.6 (2.9)

10.8 (3.3)

0.56

0.58

9.3 (2.7)

9.5 (3.0)

0.82

0.42

Head CT

9.4 (3.2)

10.9 (3.6)

2.22

0.04

9.7 (2.6)

10.5 (3.0)

1.78

0.09

Spine CT

3.5 (1.9)

3.5 (1.5)

-0.02

0.99

3.4 (1.4)

3.5 (1.5)

0.67

0.51

Pulmonary embolism CT

2.5 (1.1)

2.6 (1.3)

0.31

0.76

2.3 (1.0)

2.5 (1.1)

1.52

0.14