Number of risk perception items across articles
| Number of risk perception items | Number of articles |
| One item | 12 (22%) |
| Two items | 8 (15%) |
| Three items | 9 (17%) |
| Four items | 5 (9%) |
| Five items | 5 (9%) |
| Six items | 4 (7%) |
| Seven items | 2 (4%) |
| Eight items | 2 (4%) |
| Nine items | 2 (4%) |
| Ten or more items | 5 (9%) |
| Total=239 | Total=54 |