Table 3.
Comparison of endothelial cell density loss rate between penetrating keratoplasty and Descemet's stripping automated endothelial keratoplasty
| Follow-up period (months) | ECD loss rate, mean±SD (cells/mm2/month) | P | ||
|---|---|---|---|---|
| PKP | DSAEK | t-test | Adjusted for age and sex | |
| 0-1.5 | −561.5±425.7 | −686.4±447.7 | 0.36 | 0.78 |
| 1.5-6 | −113.2±121.4 | −68.3±152.4 | 0.15 | 0.053 |
| 6-12 | −36.6±63.5 | −21.8±77.2 | 0.46 | 0.54 |
| 12-24 | −31.4±42.0 | −14.4±45.0 | 0.27 | 0.29 |
| >24 | −53.7±14.0 | −5.1±13.0 | 0.001* | 0.012* |
*P<0.05. PKP = Penetrating keratoplasty, DSAEK = Descemet's stripping automated endothelial keratoplasty, SD = Standard deviation, ECD = Endothelial cell density