Table 1.
Demographic characteristics of study groups
| Variables | Mean±SD (range) | P (ANOVA) | |||
|---|---|---|---|---|---|
|
| |||||
| Normal (n=55) | KCN G1 (n=45) | KCN G2 (n=44) | Total (n=144) | ||
| Age | 31.07±7.06 (19-49) | 32.66±4.70 (25-47) | 31.68±5.97 (24-46) | 31.81±6.02 (19-49) | 0.493 |
| Sphere (D) | −2.44±2.27 (−6.00 - +8.00) | −1.92±1.95 (−6.75 - +1.00) | −2.81±3.53 (−13.50 - +3.75) | −2.41±2.62 (−13.5 - +8.00) | 0.271 |
| Cylinder (D) | −1.73±1.68 (0.00 - −7.25) | −2.42±1.55 (0.00 - − 8.50) | −3.69±1.99 (−0.75 - − 10.75) | −2.48±1.88 (0.00 - −10.75) | <0.001 |
| CDVA, logMAR | 0.01±0.05 (0.00 - +0.30) | 0.13±0.19 (0.10 - + 0.70) | 0.37±0.19 (0.10 - +0.80) | 0.16±0.21 (0.00 - +0.80) | <0.001 |
**The significant variables highlighted (ANOVA). ANOVA: Analysis of variance, SD: Standard deviation, KCN: Keratoconus, KCN G1: Mild KCN group, KCN G2: Moderate and severe KCN groups, D: Diopter, CDVA: Corrected distance visual acuity