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.
Among the patients who participated in the 6-month trial of the new therapy, what percentage of the people were dissatisfied with the recovery rate is additional evidence that needs to be added in order to better compare the effects of the two therapies.