GPT and obstructive sleep apnea syndrome: Single factor logistic regression analysis of the indicators with significant differences derived from the T test and U test showed that smoking history, obstructive sleep apnea syndrome, BMI, chest circumference, waist circumference, hip circumference, and upper arm circumference, thigh circumference, neck circumference, mFI, and red blood cell, alanine aminotransferase, aspartate aminotransferase, uric acid, creatine kinase, and whole blood carbon dioxide concentration were the risk factors for moderate-to-severe postoperative pain.