Table 2.
Association of various pre- and intra-operative variables with the outcome of therapeutic penetrating keratoplasty (TPK).
| Variables | Anatomical outcome |
Therapeutic outcome |
Functional outcome |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Success | Failure | P* value | Success | Failure | P* value | Success | Failure | P* value | |
| Indications of TPK | |||||||||
| Perforated corneal ulcer | 28 | 4 | 31 | 1 | 23 | 0 | |||
| Non healing corneal ulcer | 13 | 1 | 0.034 | 11 | 3 | 0.037 | 13 | 1 | 0.00 |
| Graft infection | 8 | 1 | 8 | 1 | 4 | 5 | |||
| Pseudocornea with anterior staphyloma | 0 | 2 | 1 | 1 | 0 | 2 | |||
| Preoperative visual acuity | |||||||||
| PR Inaccurate | 0 | 1 | 1 | 0 | 0 | 1 | |||
| PL+, PR Accurate | 37 | 6 | 0.00 | 37 | 6 | 0.39 | 29 | 14 | 0.14 |
| CFCF | 12 | 1 | 13 | 0 | 11 | 2 | |||
| Lens status | |||||||||
| Phakic | 37 | 4 | 36 | 5 | 31 | 10 | |||
| Pseudophakic | 10 | 2 | 0.078 | 12 | 0 | 0.31 | 8 | 4 | 0.10 |
| Aphakic | 2 | 2 | 3 | 1 | 1 | 3 | |||
| Grade of graft | |||||||||
| A | 2 | 0 | 2 | 0 | 2 | 0 | |||
| B+ | 5 | 1 | 1.0 | 6 | 0 | 0.64 | 5 | 1 | 0.37 |
| B− | 28 | 5 | 28 | 5 | 20 | 13 | |||
| Glycerine preserved cornea | 14 | 2 | 15 | 1 | 13 | 3 | |||
| Graft size (mm) | |||||||||
| ≤8 | 14 | 3 | 0.68 | 15 | 2 | 1.0 | 12 | 5 | 1.0 |
| >8 | 35 | 5 | 36 | 4 | 28 | 12 | |||
P* value calculated by Pearson Chi square test.
TPK: Therapeutic penetrating keratoplasty; PR: Projection of rays; PL: Perception of light; CFCF: Counting fingers close to face.