Prevalence of ultrasound-detected knee synovial abnormalities in a middle-aged and older general population—the Xiangya Osteoarthritis Study

Table 1 Characteristics of the study sample

n number, SD standard deviation, BMI body mass index, OA osteoarthritis
^aOverweight was defined as a BMI of 25 to 29.9 kg/m². In total, 3621 participants had complete anthropometric measurements (weight and height)
^bObesity was defined as a BMI of ≥ 30 kg/m²
^cEducated was defined as primary school or above
^dKnee injury history was defined as history of knee injury severely restricting walking for at least 1 week
^eChronic knee pain was based on a self-report of whether participant had pain, aching, or stiffness in or around their right or left knee on most days for at least 1 month within the past year
^fKnee radiographic OA was confirmed if at least one knee (tibiofemoral or patellofemoral joint) was rated as Kellgren and Lawrence grade ≥ 2

ISSN: 1478-6362