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Table 1 Participant characteristics

From: Structural predictors of response to intra-articular steroid injection in symptomatic knee osteoarthritis

Variable MRI cohort Radiograph cohort
Number 120a 188
Age (years), mean (SD) 62.3 (10.3) 63.2 (10.3)
Female, frequency (%) 62 (51.7) 97 (51.6)
Number of days to follow-up appointment, median (IQR) 8.0 (7.0–14.0) 8.0 (7.0–14.0)
KOOS-pain subscale score (0–100)b, median (IQR) 44.4 (36.1–55.6) 44.4 (36.1–55.6)
Pain on nominated activity, VASNA (0–10 cm)c, median (IQR) 7.0 (5.5–7.7)d 7.0 (5.6–8.1)e
Pain in last week, VAS (0–10 cm)c, median (IQR) 6.5 (4.7–7.8)d 6.5 (4.9–8.0)e
Responders to injection, at follow-up visit, frequency, (%) 85 (70.8) 137 (72.9)
  1. MRI magnetic resonance imaging, SD standard deviation, IQR interquartile range, CI confidence interval, KOOS Knee Injury and Osteoarthritis Outcome Score, VAS visual analogue scale, VAS NA VAS for pain during nominated activity. aThere were 109 baseline images available for assessment of Whole Organ Magnetic Resonance Imaging Score and 111 available for assessment of synovial tissue volume; bKOOS pain subscale is scored from 100 (no pain) to 0 (extreme pain); cVAS is scored from 0 cm (no pain) to 10 cm (pain as bad as you can imagine); dthere were 5 and 3 patients who did not complete their VASNA and VAS for pain in the last week, respectively; ethere were 8 and 4 patients who did not complete their VASNA and VAS for pain in last the week, respectively