Impact of obesity on complications and surgical outcomes of adult degenerative scoliosis with long-segment spinal fusion.

INTRODUCTION: The relationship between obesity and outcome of spine surgery has been controversial. The impact of obesity on surgical outcomes of patients undergoing long- segment (6 vertebrae or more) spinal fusion have not been studied. This study was designed to define the influence of obesity on the outcomes of patients undergoing long-segment spinal fusion. METHODS AND MATERIALS: A retrospective study of patients undergoing long-segment (6 vertebrae or more) spinal fusion was realized. Patients were divided into non-obese group and obese group. Variables such as blood loss, operative time, length of stay, complications, reoperation rates, and clinical outcome were compared between the two groups. RESULTS: Thirty-four non-obese patients (BMI: 26.43±0.87) and 27 obese ones (BMI: 35.35±1.81) were recruited. Number of fused levels in non-obese group was not significantly different from obese group (9.06±0.57 vertebrae vs 8.85±0.68 vertebrae, P=0.65). There was no significant difference between non-obese group and obese group in the blood loss during surgery (P= 0.12), the operating time (P=0.46) and the length of hospitalization (P=0.64). Similarly, no significant difference was found in surgical complications (P=0.76) and medical complications (P=0.82) between the two groups. The rate of ambulatory improvement is similar between non-obese group and obese group (P=0.64). CONCLUSION: Our study showed that there was no relationship between obesity and adverse surgical outcomes in ADS surgery with long-segment (6 vertebrae or more) spinal fusion.