Table 1.
Descriptive statistics and repeatability of Pentacam measurements made on a single day in subjects with keratoconus.
| Mean (SD)a | (Min–Max)a | Sw (95% CI) | RC (95% CI) | ICC (95% CI) | CoV (%) | Kendall’s tau-bb | Pb (2-tailed) | Spearman’s rhob | Pb (1-tailed) | |
|---|---|---|---|---|---|---|---|---|---|---|
| (n = 61) | ||||||||||
| A (mm) | 7.02 (0.56) | (5.14–8.10) | 0.067 (0.060–0.074) | 0.18 (0.17–0.20) | 0.99 (0.98–0.99) | 0.95 | − 0.162 | 0.07 | − 0.246 | 0.03 |
| B (mm) | 5.37 (0.58) | (3.56–6.49) | 0.087 (0.078–0.095) | 0.24 (0.22–0.26) | 0.98 (0.97–0.99) | 1.61 | − 0.031 | 0.73 | − 0.035 | 0.39 |
| C (μm) | 485.2 (40.5) | (394.5–574.5) | 5.47 (4.91–6.03) | 15.2 (13.6–16.7) | 0.98 (0.97–0.99) | 1.13 | 0.174 | 0.05 | 0.265 | 0.02 |
A = Anterior curvature of the 3 mm zone over the thinnest point (mm). B = Posterior curvature of the 3 mm zone under the thinnest point (mm). C = Thickness of the thinnest point on the cornea (μm).
aSubject mean.
bSubject SD versus subject mean.