Table 4.
Multivariate linear regression of the baseline predictive factors and its significance on the maximum keratometry changes
| Variable | Changes in K-max (D) | ||
|---|---|---|---|
| Regression coefficient | 95% CI | P | |
| Place of birth (city) | 0.882 | −0.359-2.124 | 0.16 |
| Atopic constitution | 0.706 | −0.763-2.175 | 0.33 |
| Rubbing frequency | 0.948 | 0.126-1.769 | 0.02 |
| Blood group | |||
| A+ | 2.729 | 0.975-4.484 | 0.005 |
| A− | 1.620 | −1.350-4.591 | |
| B+ | 0.524 | −1.501-2.549 | |
| B− | 4.522 | 1.615-7.429 | |
| O+ | 2.027 | 0.385-3.669 | |
| O− | Ref | Ref | |
| Pretreatment BCVA (logMAR) | 2.707 | −0.516-5.930 | 0.09 |
| Pretreatment corneal asphericity (Q value) | −3.99 | −6.038-−1.950 | <0.001 |
| Pretreatment astigmatism type | |||
| ATR | −0.453 | −1.463-0.555 | 0.27 |
| Oblique | −0.935 | −2.096-0.226 | |
| WTR | Ref | ||
| Pretreatment ARC | 0.756 | −0.529-2.043 | 0.24 |
| Pretreatment PRC | −0.455 | −1.906-0.996 | 0.52 |
| Pretreatment CKI | −55.38 | −85.91-−24.84 | 0.001 |
K-max: Maximum keratometry, CI: Confidence interval, BCVA: Best corrected visual acuity, ATR: Against the rule, WTR: With the rule, ARC: Anterior average radii of curvature, PRC: Posterior average radii of curvature, CKI: Central keratoconus index, logMAR: Logarithm of the minimum angle of resolution