Fig. 1

Kaplan Meier curve for determining the probability of hyperprolactinemia following initial normalization. The Kaplan-Meier curve demonstrates the probability of hyperprolactinemia following initial normalization in hypoprolactinemia group as well as in the non-hypoprolactinemia group. No patients with hypoprolactinemia experienced the relapse of hyperprolactinemia, but no statistical significance was observed (P = 0.178)