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Low Back Pain as a Risk Factor for Recurrent Falls in People With Knee Osteoarthritis
Author(s) -
Iijima Hirotaka,
Shimoura Kanako,
Aoyama Tomoki,
Takahashi Masaki
Publication year - 2021
Publication title -
arthritis care and research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.032
H-Index - 163
eISSN - 2151-4658
pISSN - 2151-464X
DOI - 10.1002/acr.24136
Subject(s) - medicine , osteoarthritis , physical therapy , risk factor , low back pain , knee pain , logistic regression , odds ratio , sciatica , population , alternative medicine , environmental health , pathology
Objective Knee osteoarthritis (OA) has been suggested to increase the risk of falls. Low back pain (LBP) is a potential risk factor for falls in people with knee OA, but this issue has not been addressed adequately in previous studies. The objective of this study was to investigate the relationship between LBP and falls in people with knee OA in a 12‐month period. Methods Participants with knee OA (Kellgren/Lawrence [K/L] grade ≥1) completed questionnaires for LBP and falls that occurred in the preceding 12 months. Binary and ordinal logistic regression analyses were performed to assess the relationship between LBP or moderate‐to‐severe LBP (numeric rating scale ≥4 points) and any fall (≥1 fall) or recurrent falls (≥2 falls) after adjustment for age, sex, K/L grade, knee pain severity, and quadriceps strength. Sensitivity analyses were performed excluding people with sciatica, nonchronic LBP, K/L grade 1, and those receiving pain medications. Results We included 189 participants (ages 61–90 years, 78.3% women) in this study. Of these participants, 41 (21.6%) reported falls in the preceding 12 months. People with any LBP (n = 101) and those with moderate‐to‐severe LBP (n = 45) had 2.7‐ and 3.7‐times higher odds of recurrent falls, respectively. Sensitivity analyses revealed a strong correlation between moderate‐to‐severe LBP and recurrent falls. Conclusion Thorough investigation of LBP as a risk factor for recurrent falls in people with knee OA may provide a novel insight into the pathomechanics of recurrent falls in this population.