关键词: 自身对照试验

Abstract:

Objective To evaluate the efficacy and safety of centella triterpenes cream?誖for treating crow′s feet. Methods A double-blind, randomized, vehicle-controlled 12-week study was conducted. Centella triterpenes cream?誖was applied to the lateral canthus on one side （treatment side） and vehicle-control cream to the lateral canthus on the other side （control side） 3 times daily. Efficacy was evaluated based on an investigator-blinded assessment, subject self-blinded assessment and a quantitative analysis by Visioscan?誖VC98 at the baseline, 4, 8, 12 weeks after the beginning of treatment. Results Thirty-six volunteers were recruited and 35 subjects completed the 12-week trial. The investigator-blinded assessment showed a significant difference in the changes of wrinkle scores between the treatment side and control side after 4 weeks （P < 0.05）, and the improvement of wrinkles was more obvious on the treatment side than on the control side at 8 and 12 weeks with a statistical difference in the wrinkle scores （both P < 0.05）. Compared with the control side, a significant increase in SEw value, which suggested an improvement in wrinkles, was observed on the treatment side after the application of centella triterpenes cream?誖. Subjects′ assessments revealed no significant difference in the occurrence of irritation or the improvement of coarse wrinkles, whereas the treatment side was superior to the control side in the improvement of skin texture（P < 0.05） at the lateral canthus. Conclusion Centella triterpenes cream?誖thrice daily is effective for the improvement of crow′s feet with no obvious side effects.

Key words: randomized controlled trial