Measuring Hemoglobin Levels in the Optic Disc of Parkinson’s Disease Patients Using New Colorimetric Analysis Software

Table 1

Epidemiologic and disease characteristics of 155 patients with Parkinson’s disease and 91 healthy subjects included in the study and statistical significance of comparison between both groups ().

	Healthy subjects ( = 91)	Patients with Parkinson’s disease ( = 155)
Age (years) : mean (range)	67.21 (55–79)	67.33 (54–80)	—
Male : female (% men)	54 : 37 (59%)	92 : 65 (59%)	—
Intraocular pressure (SD)	16.67 (1.5)	16.56 (1.71)	0.478
BCVA (Snellen scale); mean (SD)	0.95 (0.08)	0.74 (0.18)	<0.001
Disease duration (yrs); mean (SD)	—	8.52 (2.10)	—
Hoehn and Yahr Score	—	2.68 (0.82)	—
Schwab-England activity daily living scale	—	44.05 (15.97)	—

BCVA: best-corrected visual acuity; SD: standard deviation. ^*Significant difference ( < 0.05) between normal subjects and Parkinson’s disease patients for each population.