Methodological approaches to developing criteria for improvement in lumbar spinal stenosis surgery

Area of Science:

• Orthopedics
• Neurosurgery
• Spinal Surgery

Background:

• The Brigham Spinal Stenosis (BSS) Questionnaire has been used since the early 1990s for lumbar spinal stenosis patients.
• Previous validation focused on individual domain improvement, lacking criteria for overall patient success.

Purpose of the Study:

• To validate the established BSS Questionnaire for defining overall patient success in lumbar spinal stenosis.
• To establish clear criteria for measuring successful outcomes after surgical intervention.

Main Methods:

• Utilized preoperative and 24-month postoperative BSS scores from 197 patients undergoing lumbar decompression.
• Employed receiver operator characteristic (ROC) curves to determine threshold scores for success in each BSS domain.
• Developed and compared various definitions of overall surgical success based on combined domain thresholds.

Main Results:

• Thresholds for Symptom Severity, Physical Function, and Patient Satisfaction were determined as 0.46, 0.42, and 2.42, respectively.
• A definition requiring success in all domains was less sensitive but more specific than definitions requiring fewer criteria.
• The most balanced definition of overall success required achieving threshold scores in at least two domains.

Conclusions:

• Established threshold values align with prior research.
• The most balanced definition for overall patient success requires meeting at least two domain criteria.
• This validation provides a more robust measure for assessing surgical outcomes in lumbar spinal stenosis.