Data collection and statistical analysis Postoperative complications were recorded during hospitalization and the patients were followed up to 30 days after discharge. Additional data collected included patient age, body mass index (BMI), any history of smoking and neoadjuvant chemotherapy, anesthesia and operation time and the frequency of use of analgesic and antiemetic drugs. These parameters were summed and compared between the dexamethasone and placebo groups.The study endpoints were postoperative nausea and vomiting, and pain measured by the VAS and the need for additional analgesic and antiemetic drugs.