Table 1: Summary of baseline characteristics across all subjects and within BMI categories.

All subjects ( 𝑛 = 1 7 8 8 )BMI <25 ( 𝑛 = 2 6 9 )BMI ≥25 and <30 ( 𝑛 = 6 4 1 )BMI ≥30 and <35 ( 𝑛 = 5 2 9 )BMI ≥35 ( 𝑛 = 3 5 2 )

Knee pain (0–100) [Mean (sd)]18.8 (20.9)15.6 (18.3)16.6 (19.5)19.6 (20.8)24.2 (23.8)
BMI [kg/m] [Mean (sd)]30.7 (6.0)
 BMI <25 [%]15
 BMI ≥25 and <30 [%]36
 BMI ≥30 and <35 [%]29
 BMI ≥35 [%]20
Age [Mean (sd)]67.2 (7.7)67.9 (7.8)68.4 (8.0)67.0 (7.6)64.5 (6.7)
Sex [% women]6068575763
Living situation [% Lives alone]1716161718
Education [% ≥ College]4755474544
Race [% White]9096928985
Site [% Alabama]3837383739
Radiographic Knee Osteoarthritis [%]5441525571
Pain in the hip, ankle, or foot [%]5243475366
No Comorbidity [%]5966615951
Depressive Symptoms [Mean CES-D (sd)]6.4 (6.8)5.3 (5.8)5.8 (6.1)6.8 (7.3)7.7 (7.6)
Knee extensor strength [N-M/kg] [Mean (sd)]1.03 (0.41)1.17 (0.41)1.11 (0.43)1.00 (0.37)0.82 (0.33)