| Authors | Effective | Triad of Von Wahl | Statistical test |
| KHANNA, Inde, 1999 [25] | 111 |
|
|
| El Idrissi, Maroc,1996 [13] | 82 | 78 (95%) | P = 0.000010 |
| Diallo, Mali, 2009 [9] | 111 | 89 (80.2%) | P = 0.057358 |
| MARiKO, Mali, 2008 [4] | 96 | 68 (70.8%) | P = 0.595269 |
| A. G. Diarra, Mali, 2009 [14] | 138 | 95 (68.84%) | P = 0.771136 |
| G. Djaré, Mali, 2006 [5] | 71 | 57 (80.3%) | P = 0.084032 |
| Our study, Mali, 2017 | 54 | 36 (66.7%) |
|