Evaluation of the therapeutic effect
A 4-point scale used in previous studies was adopted to grade the
therapeutic effect. A lumen constriction score (from 1–4) was used to
evaluate the therapeutic effect, as follows:
- Grade I: No change
- Grade II: A decrease in the size of the lesion less than or equal to
50%
- Grade III: A decrease in the size of the lesion more than 50% but
less than 100%; and
- Grade IV: Disappearance of the lesion and no recurrence for at least 1
year5,6.