title: Factors influencing the length of stay in patients with lumbar pedicle screw fixation.
abstract: BACKGROUND
  Current health care practices aim for cost reduction to achieve maximal benefit. Because of the increasing number of spinal fusions, this area has become a target for both hospitals and payment organizations. Length of stay (LOS) is one potentially modifiable variable to help reduce overall cost. Attempting to predict the LOS in spinal surgery based on patient factors has not revealed a set of variables that are consistently associated with increased stay.
  
  
  METHODS
  Medical records from all patients who underwent posterior lumbar spinal fusion by a single neurosurgeon at a single facility were retrospectively examined in a blind fashion. Data were obtained including age, gender, body mass index (BMI), American society of Anesthesiologists (ASA) and analyzed to determine a potential relationship with LOS.
  
  
  RESULTS
  A total of 1360 patients were identified for analysis. There were significant but small correlations between age, ASA, BMI, and LOS.
  
  
  CONCLUSIONS
  There is an effect of age, ASA, and BMI on LOS. However, the significance of this effect is small. Future studies aiming to identify additional factors, which could potentially be modifiable, in order to work on decreasing LOS in lumbar spinal fusion patients.
authors.affiliation: Department of Neurosurgery, UPMC, Pittsburgh, Pennsylvania, USA.
authors.forename: Matt
authors.initials: M
authors.lastname: El-Kadi
authors.affiliation: Department of Anesthesiology, UPMC, Pittsburgh, Pennsylvania, USA.
authors.forename: James
authors.initials: J
authors.lastname: Ibinson
authors.affiliation: Department of Neurosurgery, UPMC, Pittsburgh, Pennsylvania, USA.
authors.forename: Erin
authors.initials: E
authors.lastname: Donovan
authors.affiliation: Department of Anesthesiology, UPMC, Pittsburgh, Pennsylvania, USA.
authors.forename: Dan
authors.initials: D
authors.lastname: Sullivan
authors.affiliation: Wayne State University School of Medicine, Detroit, Michigan, USA.
authors.forename: Rayyan
authors.initials: R
authors.lastname: Kadi
keywords: Age; American society of Anesthesiologists; length of stay; lumbar fusion; obesity