Non-inferiority
−2.7
At 12 months’ follow-up, the mean difference in VEINES-QOL scores between the SAP and TAP groups was −1.1 (95 per cent c.i. −2.7 to 0.1) points; for VEINES-Sym scores, it was −0.7 (−2.5 to 0.0) points. The non-inferiority margin, predetermined at 5 per cent of the VEINES-QOL/Sym scores at 12 months’ follow-up for the TAP group, was −2.7 points (
Values are mean differences with 95% confidence interval; dotted line indicates non-inferiority line. VEINES-QOL/Sym, VEnous INsufficiency Epidemiological and Economic Study Quality of Life/Symptoms; SAP, isolated ambulatory phlebectomy with or without delayed endovenous truncal ablation; TAP, thermal ablation with concomitant phlebectomy.