| Author | Mean follow-up period | Study quality (risk of bias for RCTs; NOS for OBS) | ||
| Aranha | 5 months | High | ||
| Navaei | ETV: 15.22 months; Shunt: 17.12 months | High | ||
| Kulkarni | 1, 3, 6, 12 months after surgery for both groups | High | ||
| Goyal | 6 months | High | ||
| Pinto | 3~12 months | High | ||
| Rahman | 30 days | High | ||
| Uche | 1.27 years for both groups | 6 | ||
| Lim | 1 year for both groups | 5 | ||
| Beuriat | ETV: 4.3 years | 6 | ||
| Laeke | 2 years for both groups | 6 | ||
| Le Fournier | >3 months | 6 | ||
| Kulkarni | 3; 6; 12 months for both groups | 7 | ||
| Beuriat | 8 years and 10 months for both groups | 7 | ||
| Rodis | 16.3 years for both groups | 5 | ||
| Jernigan | 1 year for both groups | 8 | ||
| Lima | 1 year for both groups | 6 | ||
| Elgamal | 68 months for both groups | 5 | ||
| Gonda | 5 years for both groups | 6 | ||
| El-Ghandour | Shunt: 12.5 years | 7 | ||
| Appelgren | 4.7 years for both groups | 6 | ||
| Ruggiero | NA | 7 | ||
| Tuli | 11 years for both groups | 8 | ||
| Kulkarni | >12 month | 6 | ||
| Jonathan Pindrik, MD | 2 years for both groups | 6 | ||
| Christopher M. Bonfield | 8 years for both groups | 7 | ||
| Ian C. Coulter1 | 5 years for both groups | 6 | ||
| Bartosz Polis | NA | 7 | ||
| Reynolds | 80 days | 6 | ||