| Study | Random sampling | Sample sizing | Study in DRC | HTLV | Subject description | Total |
| Goubau P et al. [20] |
| √ | √ | √ | √ | 4/5 |
| Kayembe K. et al. [19] |
| √ | √ | √ | √ | 4/5 |
| Moulia-Pelat J.P. et al. [22] | √ | √ | √ | √ | √ | 5/5 |
| Jeannel D. et al. [21] | √ | √ | √ | √ | √ | 5/5 |
| Goubau P. et al. [23] | √ | √ | √ | √ | √ | 5/5 |
| Delaporte E. et al. [24] | √ | √ | √ | √ | √ | 5/5 |
| Tshala K.D. et al. [25] |
| √ | √ | √ | √ | 4/5 |