Osteoarthritis

Hip Abductor Weakness and Its Association With New or Worsened Knee Pain: Data From the Multicenter Osteoarthritis Study

Arthritis Care Res (Hoboken)Published Prospective cohort study

Main finding · Worsened knee pain, womenResult — go to the resultOdds ratio 1.7 95% CI 1.1–2.6

Authors' conclusion

Hip abductor weakness was associated with worsening knee pain in women with strong knee extensors, but not with incident frequent knee pain in men or women.

Study context

Population
Multicenter Osteoarthritis Study participants (baseline 144-month visit), analysed separately in women and men
Exposure
Lowest vs highest quartile of hip abductor strength
Outcome
Worsened knee pain (2-point increase in WOMAC pain) and incident frequent knee pain
Follow-up
8, 16, and 24 months after baseline
Methodological detailsmulticentre, leg-specific analyses, sex-specific analyses, adjusted for potential covariates, stratified by knee extensor strength (high vs low)
  • Multicentre
  • Leg-specific analyses
  • Sex-specific analyses
  • Adjusted for potential covariates
  • Stratified by knee extensor strength (high vs low)

Main finding

Worsened knee pain, women

Odds ratio

1.7

95% CI 1.1–2.6

Lowest quartilevs Highest quartile
OR 1.7 (95% CI 1.1–2.6)

As reported in the abstract

Observational data: associations, not effects.

Further findings

OutcomeOR (95% CI)
Worsened knee pain, women with high knee extensor strength (subgroup)2.0 (1.1–3.5)

Worsened knee pain, women with high knee extensor strength (subgroup)

Significant associations limited to women with high knee extensor strength

Original publication

Hip Abductor Weakness and Its Association With New or Worsened Knee Pain: Data From the Multicenter Osteoarthritis Study. Arthritis Care Res (Hoboken). Published 22 June 2023. doi:10.1002/acr.25160

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