KOA: low back pain is tied to increased risk for multiple falls

  • Iijima H & al.
  • Arthritis Care Res (Hoboken)
  • 07/01/2020

  • Miriam Davis, PhD
  • Clinical Essentials
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Takeaway

  • Low back pain (LBP), especially moderate-severe LBP, is associated with a higher risk for falls in people with knee osteoarthritis (KOA).
  • Knee pain severity did not affect the association.

Why this matters

  • LBP in patients with KOA deserves attention.

Study design

  • A cross-sectional cohort of 189 people with KOA (aged 61-90 years) questioned about falls and LBP in the preceding 12 months.
  • Knee pain severity was assessed by the Japanese Knee Osteoarthritis Measure (JKOM).
  • Falls reported as "any" or "multiple" were defined as ≥2 falls.
  • Knee pain severity was assessed using a numeric rating scale of 0-10 points.
  • Funding: Japan Society for the Promotion of Science.

Key results

  • LBP (vs no LBP) was associated with a higher risk for multiple falls after controlling for covariates:
    • OR, 2.74 (P=.04).
  • Moderate-severe LBP (vs no LBP) was associated with a higher prevalence of falls (chi-square test: P=.007).
    • According to binary logistic regression analyses, after adjustment for covariates, moderate-severe LBP was associated with a higher prevalence of:
      • Any falls: OR, 2.90 (P=.010).
      • Multiple falls: OR, 3.72 (P=.007).
  • No interaction was seen between LBP and JKOM, indicating that falls occurred independent of knee pain severity.

Limitations

  • Cross-sectional, observational design.