We plan to compare the preoperative and postoperative data of approximately 160 patients undergoing gastric sleeve surgery (android-gynoid, male-female, comparison of patients with different degree of obesity, age comparison, etc.) Many preoperative and postoperative data are known about the patients (weight, height, BMI, preoperative comorbidities, heart ultrasound values, respiratory function values, laboratory parameters, smoking habits, rate of weight loss in half a year and one year, etc.). By statistical analysis of these data, we try to draw conclusions about the effectiveness of gastric sleeve surgery, expected complication rate, etc.,
