Table 2 Mean ± standard deviation, or median (interquartile range) of ocular parameters in the completed and dropout groups.

From: Association between long-term orthokeratology responses and corneal biomechanics

Parameters Completed subjects (37 eyes from 37 subjects) Dropout subjects (14 eyes from 14 subjects) Comparison between two groups
Steep-K (D) 44.03 ± 1.74 43.15 ± 1.14 t = −2.118, p = 0.041
Flat-K (D) 42.91 ± 1.58 42.02 ± 1.13 t = −2.227, p = 0.033
Steep-Q −0.184 ± 0.148 −0.115 ± 0.133 t = 1.602, p = 0.121
Flat-Q −0.341 ± 0.098 −0.323 ± 0.106 t = 0.554, p = 0.585
CH (mmHg) 10.40 (1.50) 10.78 (1.49) p = 0.441*
CRF (mmHg) 9.95 ± 1.30 10.31 ± 1.26 t = 0.919, p = 0.367
S (N/mm) 0.061 ± 0.007 0.058 ± 0.008 t = −0.947, p = 0.353
EN (MPa) 0.536 ± 0.118 0.474 ± 0.085 t = −3.073, p = 0.046
  1. Significant difference was bold.
  2. Steep-K: keratometry along the steepest meridian; Flat-K: keratometry along the flattest meridian; Steep-Q: asphericity along the steepest meridian; Flat-Q: asphericity along the flattest meridian; CH: corneal hysteresis; CRF: corneal resistance factor; S: corneal stiffness; EN: normalized corneal tangent modulus.
  3. Comparisons using unpaired t-tests, except CH using Mann-Whitney test*.