Table 1

Characteristics of study sample (395 knees in 373 subjects)

CharacteristicsValue
Age, years, mean (SD)62.9 (8.2)
Female, n (%)254 (68.1)
Caucasian, n (%)319 (85.5)
BMI, kg/m2, mean (SD)30.0 (5.1)
Kellgren and Lawrence grade*
    0172 (43.5)
    193 (23.5)
    258 (14.7)
    357 (14.4)
    415 (3.8)
Frequent knee symptoms, n (%)*†97 (24.5)
Symptomatic knee osteoarthritis, n (%)*‡48 (12.2)
Alignment*§
    Varus184 (47.2)
    Neutral124 (31.8)
    Valgus82 (21.0)
  • *Knee-based characteristics.

  • †Frequent knee symptoms: reported knee pain, aching or stiffness on most days during the past 30 days both on telephone interview and at clinic visit.

  • ‡Symptomatic knee osteoarthritis: frequent knee symptoms and Kellgren and Lawrence grade ⩾2.

  • §Varus alignment: ⩾2° varus; neutral alignment: 1° varus to 1° valgus; valgus alignment: ⩾2° valgus.