Name the statistic test most appropriate to assess whether patients with cancer of the parathyroid gland with elevated postoperative parathyroid hormone have a shorter overall survival compared with patients with normal parathyroid hormone after adjusting for potential confounding variables such as age, gender, race, socioeconomic status, tumor size, grading, staging, and so forth.

Practice and improve your surgery basics using questions of surgical clerkship material for third- or fourth-year medical students preparing for the USMLE and shelf exams