From: BioN∅T: 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 |