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Table 2 Summary Statistics for Turnitin Similarity Report

From: A plagiarism paperdemic: determining plagiarism among COVID-19 articles in infectious disease journals between 2020 and 2021

 

Quartile 1

Quartile 2

Quartile 3

Quartile 4

Number of papers examined

79

99

65

67

Average Number of Authors

14.82 ± 12.38

7.82 ± 4.76

7.0 ± 4.59

4.99 ± 3.4

Median Number of Authors

10

7

6

4

Similarity report (avg ± std)

6.9% ± 5.66

9.89% ± 8.81

7.31% ± 8.28

8.76% ± 7.81

Similarity report (Median, IQR)

6.5 (IQR, 8)

Presence of plagiarism

36.7% (n = 29)

52.5% (n = 52)

20% (n = 13)

52.2% (n = 35)

Average # of copied sentences

0.95 ± 2.08

2.89 ± 5.71

2.32 ± 10.92

2.79 ± 5.0

Median # of copied sentences

3 (IQR4)

Redundancy

3.8% (n = 3)

19.2% (n = 19)

4.6% (n = 3)

8.9% (n = 6)

Average Time Spent in analysis (min)

2.44 ± 2.09

2.55 ± 2.84

2.25 ± 3.8

2.51 ± 3.67

Far Out Reports (based on Tukey Test)

1 32%

4 32%, 34%, 36%, 61%

3 33%, 33%, 40%

0