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Table 1 Negated sentences statistics

From: BioNT: A searchable database of biomedical negated sentences

 

PMC

PubMed

Elsevier

TOTAL

Title sentences

167,691

18,974,626

1,914,879

21,057,196

Title negated

6105

414,809

19,430

440,344

Title %

3.64

2.19

1.01

2.09

Abstract sentences

1,060,652

82,320,574

8,970,587

92,351,813

Abstract negated

114,772

9,298,962

702,280

10,116,014

Abstract %

10.82

11.30

7.83

10.95

Full-text sentences

18,920,031

0

204,459,184

223,379,215

Full-text negated

2,360,129

0

19,180,949

21,541,078

Full-text %

12.47

-

9.38

9.64

Total sentences

20,148,374

101,295,200

215,344,650

336,788,224

Total negated

2,481,006

9,713,771

19,902,659

32,097,436

Total %

12.31

9.56

9.24

9.53

  1. Number and proportion of negated sentences in PubMed Central Open Access Subset (PMC), PubMed and Elsevier articles.