For a certain type of ulcer, traditional therapy can completely heal 44% of patients' ulcers within 6 months. A new therapy for this type of ulcer has achieved obvious improves in 80% of the ulcers treated in a 6-month trial. 61% of ulcers were healed. Since the trial only treated those ulcers very severe, this new treatment is obviously more effective than traditional treatments.
In order to better compare the effects of the two therapies, additional evidence that needs to be added is the proportion of patients with this type of ulcer, treated under traditional therapies in 6 months, who have achieved significant improvement.