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Table 3 Results of ordinal logistic regression analysis to characterize the association between depression and quartile of self-reported and performance-based physical function (n = 95) a

From: Psychological health is associated with knee pain and physical function in patients with knee osteoarthritis: an exploratory cross-sectional study

Variables

Proportional OR (95% CI)

p-value

Self-reported physical function

 JKOM “activities of daily living”, points

2.64 (1.18–5.90)

0.018

Performance-based physical function

 Gait velocity, meters/second

3.13 (1.37–7.16)

0.007

 Timed up and go, seconds

3.12 (1.36–7.16)

0.007

 Five repetition chair stand, seconds

1.61 (0.75–3.49)

0.223

  1. JKOM Japanese Knee Osteoarthritis Measure, OR Odds ratio; 95% CI: 95% confidence interval
  2. a Proportional OR (95% CI) for a greater quartile (1–4; 1 [< 25th percentile] indicates better function and 4 [≥75 percentile] indicates worse function) was calculated (continuous) to indicate predictive ability of the presence of depression while simultaneously including (one-step model) age (continuous), sex, body mass index (continuous), index knee radiographic tibiofemoral joint Kellgren/Lawrence grade (continuous), objectively measured physical activity (continuous), and presence of bilateral knee pain (0: absence, 1: presence) in the ordinal regression model
  3. See Additional file 1: Table S1 for details of quartiles in JKOM “activities of daily living” and each performance-based physical function
  4. Bold represents statistically significant result