| Gun Ownership and Violence Research | 8 |
| Urban, Neighborhood, and Segregation Studies | 7 |
| COVID-19 Pandemic Impacts | 5 |
| Vaccine Coverage and Hesitancy | 5 |
| Nursing Education, Practice, and Leadership | 4 |
| Heavy Metal Exposure and Toxicity | 3 |
| Homelessness and Social Issues | 3 |
| Injury Epidemiology and Prevention | 3 |
| American Environmental and Regional History | 3 |
| Race, History, and American Society | 3 |
| Housing Market and Economics | 3 |
| Urbanization and City Planning | 3 |
| American Constitutional Law and Politics | 3 |
| Museums and Cultural Heritage | 3 |
| School Choice and Performance | 3 |
| Species Distribution and Climate Change | 3 |
| Hydrology and Watershed Management Studies | 2 |
| Healthcare Policy and Management | 2 |
| Biotechnology and Related Fields | 2 |
| Science, Research, and Medicine | 2 |