Table 3.
Distribution of the number of documents on population surveillance (2000–2019) by thematic category.
| Web of Science subject category | N docs | % | N journals | N docs/journal |
|---|---|---|---|---|
| Public, Environmental & Occupational Health | 8473.28 | 21.62 | 277 | 30.59 |
| Infectious Diseases | 4111.17 | 10.49 | 104 | 39.53 |
| Medicine, General & Internal | 2584.92 | 6.60 | 163 | 15.86 |
| Oncology | 1778.55 | 4.54 | 142 | 12.52 |
| Multidisciplinary Sciences | 1672.33 | 4.27 | 28 | 59.73 |
| Immunology | 1460.45 | 3.73 | 99 | 14.75 |
| Veterinary Sciences | 1440.35 | 3.68 | 84 | 17.15 |
| Pediatrics | 1019.67 | 2.60 | 109 | 9.35 |
| Cardiac & Cardiovascular Systems | 916.08 | 2.34 | 101 | 9.07 |
| Gastroenterology & Hepatology | 821.83 | 2.10 | 75 | 10.96 |
| Microbiology | 818.95 | 2.09 | 74 | 11.07 |
| Psychiatry | 777.55 | 1.98 | 130 | 5.98 |
| Clinical Neurology | 626.20 | 1.60 | 118 | 5.31 |
| Surgery | 591.50 | 1.51 | 143 | 4.14 |
| Health Care Sciences & Services | 581.03 | 1.48 | 127 | 4.57 |
| Urology & Nephrology | 545.67 | 1.39 | 66 | 8.27 |
| Tropical Medicine | 516.70 | 1.32 | 26 | 19.87 |
| Obstetrics & Gynecology | 441.25 | 1.13 | 74 | 5.96 |
| Pharmacology & Pharmacy | 427.00 | 1.09 | 109 | 3.92 |
| Medicine, Research & Experimental | 397.47 | 1.01 | 74 | 5.37 |