Analysis of Choroidal Vascularity Index in Keratoconus Patients Using Swept-Source Optical Coherence Tomography-Based Binarization Techniques

Table 1

Patients’ baseline characteristics.

	KC (97 eyes/52 patients)	Control (145 eyes/89 patients)	value
Sex (female)	19 (36.5%)	40 (44.9%)	0.38
Age, years	35.0 (13.7)	52.7 (17.4)	<0.0001
Eye (right)	48 (49.5%)	68 (46.9%)	0.70
BCVA, Snellen	20/24	20/21	<0.0001
KC severity^†
Early	37 (38.1%)	NA	—
Moderate	33 (34.0%)
Advanced	27 (27.8%)
Cross-linking	24 (24.7%)	NA	—
Other surgeries^‡
None	91 (93.8%)	NA	—
PK	5 (5.2%)
DALK	1 (1.0%)

Baseline features of participants by study group. Categorical variables expressed as n (percentage) and quantitative variables as means (standard deviation). Percentages may not add up to 100% due to rounding. Sex and age are reported at patient level; all other variables are reported at eye level. BCVA: best-corrected visual acuity; KC: keratoconus; NA: does not apply; PK: penetrating keratoplasty. n = 94 eyes. ^†Based on Pentacam HR® software classification system. ^‡Patients had surgery after the current study.