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Table 3 Sensitivity and specificity calculations using an iThenticate score of 15 % compared to manually detected plagiarism

From: Plagiarism in submitted manuscripts: incidence, characteristics and optimization of screening—case study in a major specialty medical journal

  

Manual curation (gold standard)

 

No plagiarism

Plagiarism

iThenticate overall similarity score 15 %

No plagiarism

268 (80.5 %)

10 (15.2 %)

Plagiarism

65 (19.5 %)

56 (84.8 %)

 

Total

333

66

  1. The optimal iThenticate score is 15 % where the sensitivity is 84.8 % (66 manuscripts had plagiarism by manual curation and iThenticate correctly identified 56 of those manuscripts) and the specificity is 80.5 % (333 manuscripts had no plagiarism by manual curation and iThenticate correctly identified no plagiarism in 268 of these manuscripts)