Hospital rankings for complications after spinal fusion are
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Routinely collected data on patients undergoing spinal fusion surgery do not provide a valid basis for assessing and comparing hospital performance on patient safety outcomes, reports a study in Spine.

The objective was to evaluate the extent to which a metric of serious complications determined from administrative data can reliably profile hospital performance in spine fusion surgery.

Researchers used State Inpatient Databases from nine states to characterize serious complications after elective cervical and thoracolumbar fusion. Hierarchical logistic regression was used to risk-adjust differences in case-mix, along with variability from low case volumes. The reliability of this risk-stratified complication rate (RSCR) was assessed as the variation between hospitals that was not due to chance alone, calculated separately by fusion type and year. Finally, they estimated the proportion of hospitals that had sufficient case volumes to obtain reliable complication estimates.

From 2010–2017 investigator identified 154,078 cervical and 213,133 thoracolumbar fusion surgeries.

--4.2% of cervical fusion patients had a serious complication, and the median RSCR increased from 4.2% in 2010 to 5.5% in 2017.

--The reliability of the RSCR for cervical fusion was poor and varied substantially by year.

--Overall, 7.7% of thoracolumbar fusion patients experienced a serious complication, and the RSCR varied from 6.8%-8.0% during the study period.

--Although still modest, the RSCR reliability was higher for thoracolumbar fusion.

--Depending on the study year, 0–4.5% of hospitals had sufficient cervical fusion case volume to report reliable estimates, whereas 15–36% of hospitals reached this threshold for thoracolumbar fusion.

Conclusively, a metric of serious complications was unreliable for benchmarking cervical fusion outcomes and only modestly reliable for thoracolumbar fusion.

Source: https://journals.lww.com/spinejournal/Abstract/9000/Administrative_Data_are_Unreliable_for_Ranking.1.aspx
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