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Table 1 Characteristics of the study sample

From: A functional difficulty and functional pain instrument for hip and knee osteoarthritis

Characteristics Total sample
n = 328
Mean age (standard deviation), years 61.8 (15.1)
Female 207 (64.5)
Race/Ethnicity  
   American Indian or Alaskan native 1 (0.3)
   Asian or Pacific Islander 8 (2.4)
   Black (not of Hispanic origin) 30 (9.1)
   Hispanic 4 (1.2)
   Mixed race or ethnicity 2 (0.6)
   Other or not available 4 (1.2)
   White (not of Hispanic origin) 279 (85.0)
Education level  
   ≤ High school degree/GED 64 (19.5)
   ≤ 4 years of college 96 (29.3)
   ≥ 4 years of college 168 (51.2)
Joints affected  
   Hip and knee 89 (27.1)
   Hip only 53 (16.2)
   Knee only 186 (56.7)
Joint surgery  
   Yes 150 (45.7)
PF-10 score at baseline  
   None to slightly limited 147 (44.8)
   More limited 143 (43.6)
   Most limited 38 (11.6)
  1. Except for age, all values are presented as number (percentage) of subjects. GED, general equivalency diploma; PF, physical functioning.