Baseline characteristics of patients in relation to immunoglobulin plasma levels.

Data are presented as No. (%) and median [IQR] unless otherwise indicated; r = Spearman’s rank correlation coefficient; sd = standard deviation; IQR = interquartile range; BMI = body mass index; TIA = transient ischemic attack; *p-value represents statistical analysis for asymptomatic patients versus symptomatic patients (composed of amaurosis fugax, TIA an stroke).