Table 1 Differences between successful and failed CVC performance of medical students

Sex

  Female

125

0.44

249

0.43

  Male

160

0.56

336

0.57

ASA score

  I

19

0.07

28

0.05

  II

118

0.42

256

0.45

  III

145

0.51

289

0.50

Specialty

  General surgery

154

0.53

349

0.59

  Neurosurgery

55

0.19

82

0.14

  Chest surgery

33

0.12

63

0.11

  Urology surgery

17

0.06

44

0.07

  Ear-nose-throat surgery

18

0.06

21

0.04

  Cardiovascular surgery

5

0.02

17

0.03

  Gynaecology surgery

1

0.01

6

0.01

  Plastic surgery

2

0.01

2

0.01

  Orthopaedic surgery

0

0

3

0.01

Site of central vein

  Right internal jugular

187

0.65

448

0.70

  Right femoral

44

0.15

67

0.11

  Left femoral

39

0.14

50

0.09

  Left internal jugular

16

0.06

23

0.04

Complications

  Arterial puncture

33

0.72

13

0.59

  Hematoma

13

0.28

6

0.27

  Pneumothorax

0

0

3

0.14

Performance satisfaction

  Disappointed

36

0.13

8

0.01

  Not satisfied

170

0.61

166

0.3

  Satisfied

49

0.18

243

0.43

  Highly satisfied

19

0.07

145

0.26

Confidence

  Not confident at all

36

0.13

18

0.03

  Slightly confident

141

0.51

197

0.35

  Confident

95

0.35

323

0.57

  Highly confident

3

0.01

24

0.04

Failure reason

  Failed to find vein

185

0.65

  Failed to pass guide wire

95

0.33

  Miscellaneous

6

0.02