Effect of obesity on results of endoscopic versus open lumbar discectomy: a systematic review and meta-analysis.

Significantly less mean operative time was seen in non-obese individuals and when obese patients were operated via endoscopic approach. This difference between obese and non-obese groups was significantly more in the open subgroup as compared to the endoscopic subgroup. No significant differences in blood loss, mean improvement in VAS score, recurrence rate, complication rate and length of hospital stay was found between obese and non-obese patients as well as between endoscopic versus open lumbar discectomy within the obese subgroup. The learning curve associated with endoscopy makes it a challenging procedure.