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Table 4 Descriptive statistics for the performance of each experience group on measures describing the movement of the colonoscope

From: Assessing colonoscopic inspection skill using a virtual withdrawal simulation: a preliminary validation of performance metrics

Measure

Group

M (95% CI)

Median

SD

Min

Max

Range

IQR

(a) Withdrawal time (min)

Novices

14.09 (13.32–14.87)

14.91

1.55

9.85

15.36

5.51

2.53

Experienced Endoscopists

11.91 (10.86–12.97)

11.64

1.57

9.18

14.50

5.32

2.03

(b) Linear distance travelled by colonoscope (m)

Novices

1.17 (1.02–1.32)

1.19

0.31

0.62

1.55

0.93

0.53

Experienced Endoscopists

3.78 (2.93–4.62)

3.95

1.26

2.06

5.71

3.65

2.30

(c) Total tip distance travelled (m)

Novices

4.69 (3.95–5.42)

4.88

1.48

2.63

8.39

5.75

2.02

Experienced Endoscopists

7.22 (5.81–8.65)

7.55

2.11

4.87

10.29

5.42

4.57

(d) Tip distance travelled due to up/down control movement (m)

Novices

2.61 (2.15–3.07)

2.61

0.93

1.38

4.96

3.58

1.60

Experienced Endoscopists

4.67 (3.76–5.58)

4.51

1.36

3.36

6.75

3.39

2.56

(e) Tip distance travelled due to left/right control movement (m)

Novices

1.51 (0.93–2.09)

1.75

1.16

0.02

4.12

4.10

1.85

Experienced Endoscopists

1.95 (1.24–2.67)

2.14

1.06

0.22

3.61

3.38

1.64

(f) Tip distance travelled due to axial rotation (m)

Novices

0.83 (0.48–1.18)

0.61

0.70

0.12

2.34

2.23

1.02

Experienced Endoscopists

1.89 (1.41–2.37)

1.90

0.72

0.76

2.97

2.20

1.38