Table 1: The summary of radiographic knee OA evaluation and characteristics of study group.

OA in TFJ
OA in PFJ
OPH
Grade 0
( )
Grade 1
( )
Grade 2-3
( )
Grade 0
( )
Grade 1
( )
Grade 2-3
( )
Grade 0
( )
Grade 1
( )
Grade 2-3
( )

Females, %687167687362677363
Age
Mean (±SD)
44.3 (5.9)46.1 (5.5)48.2 (5.5)*44.3 (6.0)46.5 (5.3)47.6 (5.4)*44.4 (5.9)4.9 (5.5)47.9 (5.6)*
BMI
Mean (±SD)
25.9 (4.6)28.6 (4.8)30.1 (5.7)*26.3 (4.6)28.2 (5.2)29.3 (5.5)*25.6 (4.5)28.2 (4.5)29.8 (5.3)*

OA in TFJ: radiographic osteoarthritis in tibiofemoral joint; OA in PFJ: radiographic osteoarthritis in patellofemoral joint; OPH: osteophytes; BMI: body mass index; P value < 0.001 (compared to the group with radiographic stage 0).