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. Author manuscript; available in PMC: 2022 Jan 4.
Published in final edited form as: J Rheumatol. 2021 Sep 1;49(1):98–103. doi: 10.3899/jrheum.210270

Table 1.

Baseline characteristics

Overall (n=2666) Radiographic patellofemoral OA (n=607) No radiographic patellofemoral OA (n=2059) Radiographic patellofemoral OA with frequent knee pain (n=533) No radiographic patellofemoral OA and frequent knee pain (n=2131)
Age, years 62.2±8.0 63.6±8.0 61.8±8.0 63.6±8.0 61.8±7.9
Body mass index, kg/m2 30.6±5.9 32.8±6.7 29.9±5.4 33.2±6.9 29.9±5.4
Sex,Female, % 60 65 42 68 58
Radiographic tibiofemoral OA, % 51 85 41 87 42
History of injury/surgery, % 31 37 29 37 29

Note. Data are presented as mean±standard deviation, unless otherwise stated. Abbreviations as follows: OA, osteoarthritis