The researchers examined a total of 1,861 patients from the American College of Surgeons National Surgical Quality Improvement Program database from 2005 to 2010 who underwent elective posterior lumbar fusion. Length of stay ranged from zero to 51 days and the factors impacting LOS include:
• Age
• Morbid obesity
• ASA Class
• Operative time
• Levels operated
• Intraoperative transfusion
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