Table 1

Characteristics of study sample (514 subjects, one knee per subject)

Characteristic
Age, years, mean (SD)60.1 (7.2)
Female, N (%)286 (55.6)
Ethnicity (white), N (%)454 (88.3)
BMI, kg/m2, mean (SD)29.1 (4.5)
K/L grade* (%)
 0477 (92.8)
 137 (7.2)
Frequent knee symptoms, N (%)*85 (16.5)
Alignment*, N(%)
 Varus223 (43.4)
 Neutral193 (37.5
 Valgus98 (19.1)
  • * 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.

  • Varus alignment: 2° or higher varus; neutral alignment: 1° varus to 1° valgus; valgus alignment: 2° or higher valgus.

  • BMI, body mass index; K/L, Kellgren–Lawrence.