How does chronic endocrine disease affect cost in spine surgery?

Area of Science:

• Endocrinology
• Health Economics
• Spine Surgery Outcomes

Background:

• Comorbidities, particularly diabetes mellitus, are linked to increased length of stay and hospital costs in spine surgery patients.
• Endocrine comorbidities require further investigation for their specific impact on spine surgery expenditures.

Purpose of the Study:

• To analyze the impact of endocrine comorbidities, specifically elevated glycosylated hemoglobin (HbA1c) and hypothyroidism, on hospital costs and length of stay for spine surgery patients.
• To identify specific patient groups and surgical procedures where these comorbidities have the most significant financial and logistical impact.

Main Methods:

• Retrospective chart review of 787 patients undergoing lumbar microdiskectomy, anterior cervical decompression and fusion, or lumbar decompression and fusion between 2005 and 2008.
• Analysis of demographics, body mass index, and comorbidities (including HbA1c levels and hypothyroidism) in relation to length of stay and hospital charges.
• Statistical analysis using Mann-Whitney and Pearson chi-squared tests.

Main Results:

• Elevated HbA1c (≥6.1%) and hypothyroidism were present in 32.5% and 4.3% of patients, respectively, and increased with age.
• In lumbar decompression and fusion, these comorbidities significantly increased length of stay (from 5 to 8 days) and hospital costs (from ~$52,449 to ~$71,352).
• Elderly female patients with hypothyroidism undergoing lumbar decompression and fusion or anterior cervical decompression and fusion experienced a notable surge in costs and length of stay.

Conclusions:

• Elevated HbA1c and hypothyroidism have an additive, significant impact on hospital costs for female patients undergoing lumbar decompression and fusion.
• The pronounced increase in hospital costs and length of stay among elderly female hypothyroid patients undergoing cervical spine surgery warrants further detailed investigation.