Table 2.
Correlation between keratometric measurements and the clinical history method
| Statistic | IOLMaster | Manual | |
|---|---|---|---|
| K | mean ± SD | 38.03 ± 0.68 | 43.15 ± 1.13 |
| CHM | mean ± SD | 41.43 ± 1.06 | 41.8 ± 1.16 |
| K - CHM Difference | mean ± SD | −3.4 ± 1.3 | 1.3 ± 1.4 |
| 95% CI | −3.71 to −3.1 | 1.02 to 1.68 | |
| P-value | 0.000 | 0.000 | |
| Correlation | R | −0.042 | 0.484 |
| P-value | 0.728 | <0.001 | |
| LoA | −5.95 to −0.85 | −1.44 to 4.04 |
K, keratometry measurement; CHM, clinical history method; SD, standard deviation; CI, confidence interval; R, Pearson correlation; LoA, limit of agreement
*
Paired t-test