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Table 3 Results of the Mann-Whitney U test between the PE group and NE group

From: Dental trainees reflect more critically on negative experiences: portfolio analysis using a pragmatic approach and a rubric in Japan

 

Sandars method

 

2010

2011

2012

2013

2014

2015

2016

Overall

PE group (n)

19

32

29

18

23

20

11

152

NE group (n)

5

16

19

6

12

6

8

72

PE (median)

2

2

2

2

1

1.5

1

2

NE (median)

3

3

3

3

2

2.5

2

2.5

U-value

19

163.5

180

22

52

29.5

14

3063.5

P-value

0.0439

0.0354

0.0357

0.033

0.0008

0.0478

0.0037

p < 0.0001

 

O’Sullivan method

 

2010

2011

2012

2013

2014

2015

2016

Overall

PE group(n)

19

32

29

18

23

20

11

152

NE group (n)

5

16

19

6

12

6

8

72

PE (median)

1

2

2

1

1

1

1

1

NE (median)

3

3

3

3

2

3

2

3

U-value

14

117

135

15

70

27

19.5

2660

P-value

0.012

0.002

0.001

0.007

0.012

0.0307

0.013

p < 0.001

  1. PE: positive event; NE: negative event; n: number of people, median: median depth of reflection per person. Overall includes data from all 7 years