| Study | Study location | Number of Lassa cases (n) | Self-reported hearing loss. Participants vs controls (%) | SNHL by audiometry. Participants vs controls (%) |
| White, 1972 [10] | Nigeria (Northern Nigeria) | 23 | 17.4% |
|
| Mertens et al., 1973 [11] | Liberia | 10 | 30% |
|
| Frame et al., 1975 [12] | Missionaries who have lived in Africa | 8 missionaries | 12.5% |
|
| Cummins et al., 1990 [13] | Sierra Leone | 49 |
| *29% vs 0% |
| Ehichioya et al., 2012 [5] | Nigeria (Southern Nigeria). | 25 | Not reported |
|
| Ibekwe, 2011 [14] | Nigeria (Southern Nigeria). | 37 |
| *13.5% vs 0% |
| Ficenec et al., 2020 [15] | Sierra Leone | 147 Overall Lassa fever 47 | *17% vs. 1% |
|
| Li et al., 2020 [16] | Sierra Leone | 31 | 16% |
|