Construction and verification of prediction model for postoperative hypokalemia in patients with oral cancer.

The independent risk factors for postoperative hypokalemia in patients with oral cancer were as follows: preoperative serum potassium<3.87 mmol/L, preoperative serum calcium<2.31 mmol/L, preoperative PNI<49.16, and postoperative drainage volume>264.25 mL. Clinical attention should be paid to managing the above high-risk patients. Preventive potassium supplementation should be performed as soon as possible to reduce hypokalemia occurrence.