Id |
Subject |
Object |
Predicate |
Lexical cue |
T42 |
0-7 |
Sentence |
denotes |
Results |
T43 |
8-100 |
Sentence |
denotes |
In the first half of 2020, the total number of articles published on PubMed equaled 858,641. |
T44 |
101-209 |
Sentence |
denotes |
Overall, we identified 27,815 articles on COVID-19, which constitutes 3.24% of all publication in this time. |
T45 |
210-365 |
Sentence |
denotes |
Among those we found 18,225 (65.52%) original articles, 2,449 (8.8%) reviews, 69 (0.25%) systematic reviews with meta-analysis, and 171 (0.61%) guidelines. |
T46 |
366-472 |
Sentence |
denotes |
The remaining 6,901 (24.81%) positions were letters to the editors, commentaries, errata, or unclassified. |
T47 |
473-692 |
Sentence |
denotes |
In a per-month analysis we found that in January, two articles (0.007%) on COVID-19 were indexed, 37 (0.13%) in February, 620 (2.23%) in March, 2,514 (9.04%) in April, 5,527 (19.87%) in May, and 18,596 (66.85%) in June. |
T48 |
693-805 |
Sentence |
denotes |
From those articles, we retrieved n = 519 preprint publications (n = 319 from medRxiv and n = 200 from bioRxiv). |
T49 |
806-872 |
Sentence |
denotes |
We were able to identify 62,051 authors coming from 148 countries. |
T50 |
873-1001 |
Sentence |
denotes |
Most authors came from China (n = 11,519), followed by the United States of America (n = 9,666) and Italy (n = 7,261) (Table 1). |
T51 |
1002-1122 |
Sentence |
denotes |
Table 1 Top 20 countries with the highest number of publications on COVID-19 between 31 December 2019 and 30 June 2020. |
T52 |
1123-1224 |
Sentence |
denotes |
Rank Country Number of publications with at least one author from the country SCImago country rank |
T53 |
1225-1244 |
Sentence |
denotes |
1 China 11,519 2 |
T54 |
1245-1282 |
Sentence |
denotes |
2 United States of America 9,666 1 |
T55 |
1283-1301 |
Sentence |
denotes |
3 Italy 7,261 6 |
T56 |
1302-1329 |
Sentence |
denotes |
4 United Kingdom 4,362 3 |
T57 |
1330-1349 |
Sentence |
denotes |
5 France 3,459 9 |
T58 |
1350-1369 |
Sentence |
denotes |
6 India 2,568 10 |
T59 |
1370-1389 |
Sentence |
denotes |
7 Spain 1,765 11 |
T60 |
1390-1409 |
Sentence |
denotes |
8 Canada 1,679 7 |
T61 |
1410-1430 |
Sentence |
denotes |
9 Germany 1,596 4 |
T62 |
1431-1450 |
Sentence |
denotes |
10 Iran 1,349 17 |
T63 |
1451-1474 |
Sentence |
denotes |
11 Australia 1,317 8 |
T64 |
1475-1499 |
Sentence |
denotes |
12 Singapore 1,307 34 |
T65 |
1500-1521 |
Sentence |
denotes |
13 Brazil 1,026 14 |
T66 |
1522-1541 |
Sentence |
denotes |
14 Turkey 924 16 |
T67 |
1542-1566 |
Sentence |
denotes |
15 Switzerland 796 15 |
T68 |
1567-1591 |
Sentence |
denotes |
16 Netherlands 753 12 |
T69 |
1592-1609 |
Sentence |
denotes |
17 Japan 717 5 |
T70 |
1610-1629 |
Sentence |
denotes |
18 Taiwan 643 23 |
T71 |
1630-1650 |
Sentence |
denotes |
19 Belgium 529 20 |
T72 |
1651-1802 |
Sentence |
denotes |
20 Israel 459 26 In most cases, the country rank based on the number of publications on COVID-19 was similar to the SCImago country rank (Figure 1). |
T73 |
1803-1947 |
Sentence |
denotes |
Figure 1 Comparison of SCImago country rank in category medicine and the rank of the countries with the highest number of articles on COVID-19. |
T74 |
1948-2155 |
Sentence |
denotes |
The number of articles per one million citizens was positively associated with the Human Development Index, number of cases, and deaths due to COVID-19 per one million inhabitants (all p < 0.001) (Figure 2). |
T75 |
2156-2430 |
Sentence |
denotes |
Figure 2 Correlation plots between number of articles one author from a country per at least one million citizens and (A) Human Development Index, (B) total number of COVID-19 cases per one million citizens, and (C) total number of COVID-19 deaths per one million citizens. |
T76 |
2431-2581 |
Sentence |
denotes |
We identified 3,156 unique journal names to which we could match 2,571 titles (80.4%), including 27,296 unique articles that we were able to retrieve. |
T77 |
2582-2783 |
Sentence |
denotes |
We found that most of the matched journals belonged to category “Medicine” (n = 5,038), followed by “Infectious Diseases” (n = 2,204) and “Cardiology and Cardiovascular Medicine” (n = 1,170) (Table 2). |
T78 |
2784-2885 |
Sentence |
denotes |
Table 2 Top 20 journal categories with the highest number of articles on COVID-19 till 30 June 2020. |
T79 |
2886-2924 |
Sentence |
denotes |
Rank Categories Number of articles |
T80 |
2925-2954 |
Sentence |
denotes |
1 Medicine 5,038 (21.18%) |
T81 |
2955-2994 |
Sentence |
denotes |
2 Infectious Diseases 2,204 (9.26%) |
T82 |
2995-3053 |
Sentence |
denotes |
3 Cardiology and Cardiovascular Medicine 1,170 (4.92%) |
T83 |
3054-3083 |
Sentence |
denotes |
4 Dermatology 708 (2.98%) |
T84 |
3084-3154 |
Sentence |
denotes |
5 Public Health, Environmental and Occupational Health 531 (2.23%) |
T85 |
3155-3182 |
Sentence |
denotes |
6 Neurology 525 (2.21%) |
T86 |
3183-3217 |
Sentence |
denotes |
7 Gastroenterology 514 (2.16%) |
T87 |
3218-3268 |
Sentence |
denotes |
8 Anesthesiology and Pain Medicine 511 (2.15%) |
T88 |
3269-3332 |
Sentence |
denotes |
9 Biochemistry, Genetics, and Molecular Biology 488 (2.05%) |
T89 |
3333-3393 |
Sentence |
denotes |
10 Critical Care and Intensive Care Medicine 472 (1.98%) |
T90 |
3394-3430 |
Sentence |
denotes |
11 Internal Medicine 436 (1.83%) |
T91 |
3431-3460 |
Sentence |
denotes |
12 Hematology 434 (1.82%) |
T92 |
3461-3522 |
Sentence |
denotes |
13 Pediatrics, Perinatology, and Child Health 433 (1.82%) |
T93 |
3523-3549 |
Sentence |
denotes |
14 Surgery 425 (1.79%) |
T94 |
3550-3586 |
Sentence |
denotes |
15 Multidisciplinary 415 (1.74%) |
T95 |
3587-3616 |
Sentence |
denotes |
16 Immunology 396 (1.66%) |
T96 |
3617-3649 |
Sentence |
denotes |
17 Health Policy 347 (1.46%) |
T97 |
3650-3709 |
Sentence |
denotes |
18 Radiology, Nuclear Medicine, and Imaging 337 (1.42%) |
T98 |
3710-3741 |
Sentence |
denotes |
19 Epidemiology 323 (1.36%) |
T99 |
3742-3780 |
Sentence |
denotes |
20 Otorhinolaryngology 299 (1.26%) |