Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
| Study type | Congenital | Functional | Hydrocephalus | Spine | Tumor | Trauma | Vascular | Other | Total |
| Case report | 1 | 1 | 0 | 0 | 2 | 1 | 3 | 0 | 8 |
| Comparative | 1 | 0 | 4 | 0 | 1 | 4 | 1 | 0 | 11 |
| Clinical trial | 0 | 0 | 2 | 0 | 7 | 2 | 1 | 0 | 12 |
| Cross-sectional | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| Multi-center | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| Original | 3 | 4 | 5 | 1 | 11 | 4 | 5 | 1 | 34 |
| Review | 4 | 1 | 3 | 3 | 12 | 3 | 3 | 4 | 33 |
| Total | 9 | 6 | 16 | 4 | 33 | 14 | 13 | 5 | 100 |
