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Table 4 Patient prior CT scans of the abdomen/pelvis

From: CT imaging history for patients presenting to the ED with renal colic--evidence from a multi-hospital database

Number of prior CT scans

Frequency

Percent

0

95

45

1

46

22

2

17

8

3

11

5

4

6

3

5

2

1

6

1

0.5

7

6

3

12

1

0.5

13

12

6

14

3

1

20

1

0.5

23

2

1

24

5

2

25

4

2

26

1

0.5