Table 1.

Characteristics of sample, by limb length inequity (LLI) and joint site.

Participants with Paired Knee RadiographsParticipants with Paired Hip Radiographs
CharacteristicTotal Sample, n = 1583LLI, n = 90No LLI, n = 1493pTotal Sample, n = 1453LLI, n = 79No LLI, n = 1374p
Female, %64.364.464.20.9761.460.861.40.91
Black, %27.034.426.50.1026.834.226.40.13
History of joint problem*, %18.126.117.70.047.010.36.80.24
rOA at T0 (%)18.642.217.2< 0.0131.431.731.40.96
rOA at T1 (%)33.053.431.8< 0.0138.543.638.20.34
Joint symptoms at T0, %42.154.641.40.0238.440.538.30.50
Joint symptoms at T1, %38.643.338.30.3750.667.149.7< 0.01
Baseline age, mean (SD)60.9 (± 10.0)62.1 (± 10.2)60.8 (± 10.3)0.2461.9 (± 9.6)64.0 (± 9.4)61.8 (± 9.6)0.05
Baseline BMI, mean kg/m2 (SD)29.1 (± 5.6)31.1 (± 7.9)29.0 (± 5.7)0.0129.1 (± 5.6)30.6 (± 7.4)29.0 (± 5.5)0.06
Baseline height, cm (SD)166.4 (± 9.3)166.0 (± 9.7)166.4 (± 9.3)0.75166.6 (± 9.5)166.5 (± 9.9)166.6 (± 9.5)0.89
  • * Among participants with paired knee radiographs = history of injury, fracture, or surgery of the knee; among participants with paired hip radiographs = history of injury, fracture, surgery, or congenital problem of the hip. rOA: radiographic OA; among participants with paired knee radiographs refers to knee joint, among participants with paired hip radiographs refers to hip joint. T0: baseline assessment. T1: followup assessment. BMI: body mass index.