Factors influencing the likelihood of postoperative visual acuity being 0.2 or worse
| STD error | Confidence interval 95% CI for exp (b) | |||||
|---|---|---|---|---|---|---|
| Variable | Coefficient b | SE (b) | p Value | Odds ratio exp (b) | Lower | Upper |
| Final statistical model derived by backwards stepwise logistic regression. | ||||||
| Variables entered initially: age, sex, diagnosis, lens status, type of procedure, preoperative visual acuity, astigmatism, rejection, other complications, other pathology, and clinic. | ||||||
| OR>1, VA more likely to be ≤0.2; OR<1, VA less likely to be ≤0.2. | ||||||
| Age | −0.04 | 0.019 | 0.053 | 0.96 | 0.93 | 1.00 |
| Diagnosis | ||||||
| Keratoconus | 1.00 | |||||
| Fuchs' dystrophy | 3.39 | 1.40 | 0.02 | 29.56 | 1.89 | 461.45 |
| Bullous keratatopathy | 3.23 | 1.36 | 0.02 | 25.30 | 1.76 | 363.32 |
| Other | 3.19 | 1.24 | 0.01 | 24.21 | 2.13 | 274.68 |
| Preoperative visual acuity | −1.41 | 0.43 | 0.001 | 0.25 | 0.11 | 0.57 |
| Other complications | ||||||
| No | 1.00 | |||||
| Yes | 2.08 | 0.79 | 0.01 | 7.97 | 1.69 | 37.57 |
| Other pathology | ||||||
| No | 1.00 | |||||
| Yes | 4.10 | 0.69 | <0.001 | 60.84 | 15.80 | 234.25 |
| Not known | 1.92 | 0.83 | 0.02 | 6.81 | 1.35 | 34.33 |
| Clinic | ||||||
| A | 1.00 | |||||
| B | −0.37 | 0.79 | 0.64 | 0.69 | 0.15 | 3.24 |
| C | −0.84 | 1.88 | 0.66 | 0.43 | 0.01 | 17.28 |
| D | −1.56 | 0.65 | 0.02 | 0.21 | 0.06 | 0.75 |
| E | −2.43 | 0.67 | <0.001 | 0.09 | 0.02 | 0.33 |
| Constant | −2.06 | 1.44 | ||||