1. The prevalence of patellofemoral osteoarthritis: a systematic review and meta-analysis 
S. Kobayashi, E. Pappas, M. Fransen, K. Refshauge, M. Simic 
Osteoarthritis and Cartilage 
Volume 24, Issue 10, Pages (October 2016)
DOI: /j.joca
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2. Fig. 1
Flow chart of the number of studies included and excluded at different stages of the literature search.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
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3. Fig. 2
Prevalence and 95% CIs of patellofemoral OA amongst studies that reported the number of people with patellofemoral OA in population- and symptom-based cohorts.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
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4. Fig. 3
Prevalence and 95% CIs of patellofemoral OA amongst females and males (A), and prevalence and 95% CIs of combined and isolated patellofemoral OA (B).
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
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