This was a single-blind (treatment concealed to the investigators) randomized, multicenter, controlled trial (French spa resorts). Inclusion criteria were primary or post-thrombotic CVD with skin changes but no active ulcer (C4a, C4b, or C5). The treated group had the usual 3-week spa treatment course soon after randomization; the control group had spa treatment after the 1-year comparison period. All patients continued their usual medical care including wearing compression stockings. Treatment consisted of four balneotherapy sessions per day for 6 days a week. Follow-up was performed at 6, 12 and 18聽months by independent blinded investigators. The main outcome criterion was the incidence of leg ulcers at 12聽months. Secondary criteria were a modified version of the Venous Clinical Severity Score, a visual analog scale for leg symptoms, and the Chronic Venous Insufficiency Questionnaire 2 and EuroQol 5D quality-of-life autoquestionnaires.
Four hundred twenty-five subjects were enrolled: 214 in the treatment group (Spa) and 211 in the control group (Ctr); they were similar at baseline regarding their demographic characteristics, the severity of the CVD, and the outcome variables. At 1聽year, the incidence of leg ulcers was not statistically different (Spa: +9.3%; 95% confidence interval [CI], +5.6 - +14.3; Ctr: +6.1%; 95% CI, +3.2 - +10.4), whereas the Venous Clinical Severity Score improved significantly in the treatment group (Spa:聽鈭?.2; 95% CI, 鈭?.6 - 鈭?.8; Ctr:聽鈭?.6; 95% CI, 鈭?.0 - 鈭?.2; P聽= .04). A significant difference favoring spa treatment was found regarding symptoms after 1聽year (Spa: 鈭?.03; 95% CI, 鈭?.57 - +0.51; Ctr: +0.87; 95% CI,+0.46 - +1.26; P聽= .009). EuroQol 5D improved in the treatment group (Spa: +0.01; 95% CI, 鈭?.02 - +0.04) while it worsened (Ctr: 鈭?.07; 95% CI, 鈭?.10 - 鈭?.04) in the control group (P聽< .001). A similar pattern was found for the Chronic Venous Insufficiency Questionnaire 2 scale (Spa: 鈭?.0; 95% CI, 鈭?.4 - +0.4; Ctr: +2.4; 95% CI, +0.2 - +4.7; P聽= .008). The control patients showed similar improvements in clinical severity, symptoms, and quality of life after their own spa treatment (day聽547).
In this study, the incidence of leg ulcers was not reduced after a 3-week spa therapy course. Nevertheless, our study demonstrates that spa therapy provides a significant and substantial improvement in clinical status, symptoms, and quality of life of patients with advanced venous insufficiency for at least 1聽year.