Table 1 Demographic characteristics of all patients before intervention.

	n (%)
Age (year)	66.8±10.6
Sex (female)	104 (69.3%)
DM	25 (16.7%)
AF	3 (2.0%)
Bilateral VV	80 (53.3%)
CEAP classification
C2 and C3	133 (88.7%)
C4, C5, and C6	17 (11.3%)
BNP >100 pg/dl	7 (4.7%)
Surgical intervention
SS	130 (86.7%)
RFA	20 (13.3%)

DM: diabetes mellitus; AF: atrial fibrillation; VV: varicose veins; CEAP: clinical etiology anatomy pathophysiology; BNP: brain natriuretic peptide; SS: short stripping of saphenous veins; RFA: radiofrequency ablation