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Table 1: 
Patient characteristics
OP (n = 63)Nonop (n = 32)P Value
Sex
 Male36 (38%)20 (21%)χ² = .811
 Female27 (28%)12 (13%)
Weight (mean) (kg)80.31 (SD, 15.19)80.67 (SD, 14.72).912
Age (mean) (yr)60.87 (SD, 16.18)60.09 (SD, 16.67).825
Gd (mean) (mL)15.31 (SD, 2.65)14.91 (SD, 3.00).508
Comorbidity
 Arterial hypertension35 (56%)10 (31%)χ² = .015
 Diabetes mellitus12 (19%)6 (19%)χ² = .89
 Nicotine abuse5 (8%)3 (9%)χ² = .368
 Obesity6 (9%)1 (3%)χ² = .238
 Atherosclerosis16 (17%)4 (13%)χ² = .102
 OSAS2 (3%)1 (3%)χ² = .959
 Rheumatoid arthritis9 (14%)3 (9%)χ² = .449
  • Note:—OP indicates ophthalmologic pathology; Nonop, no ophthalmologic pathology; OSAS, obstructive sleep apnea syndrome.