Background and objective: Superficial venous surgery for CEAP 2 disease leads to an improvement in disease-specific quality of life (QoL) in the short term. However, which factors influence the magnitude of this improvement, how surgery affects QoL in patients with CEAP 4 to 6 disease, and whether this improvement is durable are not known. The objective of this study was to identify patient, operative, and surgeon factors that might influence the change in disease-specific QoL in the 2 years after superficial venous surgery. Methods: This prospective study was comprised of 203 unselected, consecutive patients with CEAP 2 to 6 disease who underwent saphenous with or without subfascial endoscopic perforator surgery and who completed the Aberdeen Varicose Vein Symptoms Severity Score (AVVSSS) before surgery and at 4 weeks, 6 months, and 2 years after surgery. Univariate and multivariate analyses were performed. Results: At baseline, recurrent and ulcer (CEAP 5 and 6) diseases were associated with a higher (worse) AVVSSS. Surgery was associated with a significant improvement in median (interquartile range [IQR]) AVVSSS: baseline, 17.8 (11.8 to 27.2); 4 weeks, 13.8 (7.9 to 21.3); 6 months, 9.6 (4.2 to 15.8); and 2 years, 8.1 (4.0 to 14.7). One hundred seventy-five patients (86%) at 6 months and 177 patients (87%) at 2 years reported an improvement in AVVSSS. Postoperative AVVSSS at both 6 months and 2 years was most significantly influenced by preoperative score (P < .0001). After adjustment for baseline AVVSSS, the following factors were identified in multivariate analysis as having a significant and independent positive () or negative () impact on AVVSSS: at 6 months, () recurrent disease (P .009), () CEAP 4 disease (P .026); and at 2 years, () long saphenous surgery (P .02), () CEAP 5 disease (P .030). Conclusion: In this unselected series, saphenous surgery with or without subfascial endoscopic perforator surgery led to an improvement in disease-specific QoL in 87% of patients out to 2 years. Although univariate analysis results suggested that many baseline factors might be associated with outcome, multivariate analysis results suggested that only surgery for recurrent disease and for CEAP 4/5 disease remained as significant negative, and only long saphenous surgery as significant positive, independent prognostic factors. These data provide evidence of the medium-term clinical effectiveness of venous surgery across the full spectrum of CEAP clinical grades, show the importance of multivariate analysis, and reemphasize the importance of minimization of recurrence. (J Vasc Surg 2002;36:896-902.) In the United Kingdom, approximately 80,000 varicose vein (VV) operations are performed each year, with about two thirds in the publicly funded National Health Service (NHS) and one third in the private sector. The indications for surgery vary widely from predominantly cosmetic concerns to intractable chronic venous ulcer. Overall, approximately 80% of patients undergo long saphenous vein (LSV) surgery alone, 10% short saphenous vein (SSV) surgery alone, and 10% both. Around 20% of operations are performed for recurrent disease. 1 In recent years, a waxing and waning of enthusiasm has been seen for subfascial endoscopic perforator surgery (SEPS), and the indications for the procedure remain controversial. 2 Three major problems bedevil venous surgery in the United Kingdom. First, VV surgery has become the most common cause of medicolegal action against general and vascular surgeons in this traditionally nonlitigious country. 3 The causes for suit are broad, ranging from major vascular injury (the minority) to concerns about the cosmetic appearance of the leg, unresolved symptomatology, and recurrence (the majority). Second, it is now clear that a poor relationship exists between so-called venous symptoms, signs of venous disease on clinical examination, 4 and objective evidence of reflux on duplex ultrasonography. 5 And third, to date, proving that VV surgery with or without SEPS confers adjuvant benefit over best medical therapy for