| Grade | Pre-Repair | Post-Repair | Z | P-value |
TT ng/dl
| 1 2 3 | 297 ± 0.01 234 ± 0.24 210 ± 0.05 | 498 ± 0.09 439 ± 0.28 412 ± 0.11 | −2.810 −2.805 −2.812 | 0.005 0.005 0.005 |