| Age | Pre-Repair | Post-Repair | Z | P-value |
TT ng/dl
| <30 yrs 31 - 40 yrs >40 yrs | 298 ± 0.15 278 ± 0.47 282 ± 0.42 | 488 ± 0.48 447 ± 0.69 435 ± 0.70 | −2.524 −2.51 −2.521 | 0.012 0.012 0.012 |