Table 1 Demographic data of patients in the ultrasound (-) and ultrasound (+) groups and wait time from OPD to MRI, MRI to OP, and OPD to OP

Ultrasound (-)

n = 50

2007

57.6 ± 7.9

9/7

51.3 ± 17.5

26.9 ± 19.2

78.2 ± 30.0

2008

59.2 ± 10.3

6/7

29.8 ± 16.0

67 ± 71.6

96.8 ± 66.8

2009

55.6 ± 10.8

3/4

23.1 ± 22.6

49.3 ± 41.8

72.4 ± 45.6

2010

61.1 ± 7.5

8/6

17.9 ± 13.8

35.2 ± 34.7

53.1 ± 35.8

Overall

58.7 ± 8.8

26/24

32.4 ± 21.4

42.8 ± 46.5

75.2 ± 47.2

Ultrasound (-)

n = 67

2011

56.7 ± 10.5

11/10

32.7 ± 17.7

26 ± 26.4

58.7 ± 26.8

2012

61.3 ± 10.8

23/23

23.5 ± 11.9

6.3 ± 16.0

29.8 ± 22.1

Overall

59.9 ± 9.5

34/33

26.4 ± 14.5

12.4 ± 21.7

38.8 ± 27.1