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Table 1 Demographic and clinical characteristics of patients with knee osteoarthritis (n = 204)

From: Patient-Reported Outcomes Measurement Information System (PROMIS) instruments among individuals with symptomatic knee osteoarthritis: a cross-sectional study of floor/ceiling effects and construct validity

Characteristic Distribution n (%)a
Age, mean ± SD years 60.2 (10.5)
Body Mass Index, mean ± SD kg/m2 32.8 (7.2)
Self-reported duration of knee pain, median (25th, 75th percentile) years 5.0 (3.0, 10.0)
Tibiofemoral Kellgren/Lawrence grade ≥ 2 183 (92.4)
Female Sex 143 (70.1)
Race  
 White 107 (52.7)
 Black 72 (35.5)
 Other 24 (11.8)
Married 52 (25.5)
Greater than high school education 170 (83.3)
  1. an (%) unless noted otherwise. SD = standard deviation