Table 1: Demographic, Clinical, Socioeconomic, and Disability Characteristics of the Participants who have Radiographic Hip OA and the Subgroup with Symptomatic Hip OA

Variable Radiographic Hip OA (N=708) Symptomatic Hip OA (N=251)
Mean (sd) or Percent
Age, y 67.0 (10.3) 66.7 (10.2)
 45-54 y 14.8 14.3
 55-64 y 30.8 33.1
 ≥65 y 54.4 52.6
BMI, kg/m2 30.0 (6.3) 31.3 (6.9)
BMI ≥ 30 43.2 50.2
Female 61.0 66.9
African American 26.6 23.5
PAS3 (0-16) 9.59 (3.53) 9.80 (3.57)
High PAS3 ≥ 10 54.2 58.6
Knee Symptoms 52.8 72.1
Comorbidity Count (0-11) 1.37 (1.28) 1.70 (1.48)
Education, <12yr 32.9 37.1
Occupation, NM4 53.2 58.2
Poverty Rate 18.4 (10.9) 18.5 (10.6)
 Low (<12%) 27.6 24.7
 Middle (12-25%) 54.0 59.0
 High (≥25%) 18.4 16.3
HAQ 1Score (0-3) 0.52 (0.65) 0.82 (0.70)
WOMAC2 Function (0-68) 15.6 (16.1) 23.3 (16.7)
WOMAC Pain (0-20) 4.58 (4.80) 7.15 (4.98)
WOMAC Total (0-96) 22.4 (22.1) 33.7 (22.6)

1 HAQ=Health Assessment Questionnaire.
2 WOMAC= Western Ontario and McMaster Universities Index of Osteoarthritis questionnaire.
3 PAS=Physical activity score related to occupation.
4 NM=non-managerial occupation.