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Grand Rounds

Neuraxial Analgesia: What is the Statewide Variation in Usage?

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BACKGROUND AND PURPOSE:

  • Butwick et al. (JAMA Network Open, 2018) examined variability in the use of neuraxial analgesia (epidural, spinal, or combined spinal-epidural blockade) across US states

METHODS:

  • Retrospective, population-based, cross-sectional analysis
  • Participants
    • Women who underwent labor in 2015
  • Study design and data analysis
    • US birth certificate data
    • Variation evaluated by state
    • Neuraxial prevalence was adjusted for antepartum, obstetric, and intrapartum factors
  • Primary outcomes
    • State-specific prevalence of neuraxial analgesia per 100 women who underwent labor
    • Variability in neuraxial analgesia use among states

RESULTS:

  • Data based on 2,625,950 women | Neuraxial analgesia was used by 73.1%
  • Age distribution
    • <15 years: 0.1% | 15 to 19 years: 7.0% | 20 to 24 years: 23.6% | 25 to 29 years: 29.6% | 30 to 34 years: 26.0% | 35 to 39 years: 11.4% | 40 to 44 years: 2.2% | 45 and 54 years: 0.1%
  • >90% of the study participants were privately insured or insured with Medicaid
  • Neuraxial analgesia prevalence
    • Lowest neuraxial analgesia prevalence: Maine: 36.6%
    • Highest neuraxial analgesia prevalence: Nevada: 80.1%
  • If the same patient received neuraxial analgesia in a high-use vs a low-use state, her odds of receiving neuraxial analgesia were 1.5-fold higher
    • Adjusted median odds ratio: 1.5 (95% CI, 1.4 to 1.6)
  • The state where a woman obtained her care accounted for 5.4% of the overall variation in neuraxial analgesia
    • Intraclass correlation coefficient: 5.4% (95% CI, 4.0% to 7.9%)

CONCLUSION:

  • Only a small portion of variation in the use of neuraxial analgesia could be attributed to the state where a laboring patient received her care
    • Patient-level and hospital-level factors (not analyzed in this current study) may further explain the variation seen between states

Learn More – Primary Sources:

United States State-Level Variation in the Use of Neuraxial Analgesia During Labor for Pregnant Women

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Related ObG Topics:

Epidural Timing: The Earlier the Better?
Cochrane Review: What are the Risks and Benefits of Epidural Analgesia During Labor?
Does Epidural Anesthesia Impact the Second Stage of Labor?

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