STUDY DESIGN: Case-control and reliability study. OBJECTIVES: To compare foot and ankle characteristics between individuals with and without patellofemoral pain syndrome (PFPS) and to identify reliable weight-bearing foot and ankle measurements for use in future research on PFPS. BACKGROUND: PFPS is a common presentation to sports medicine and orthopaedic clinics. Characteristics of the foot and ankle are often linked with PFPS development, although evidence to support this link is equivocal and there is a lack of consensus on how best to evaluate these characteristics. METHODS: A variety of weight-bearing foot and ankle measurements were evaluated by 3 raters of varying experience in 20 individuals with PFPS and 20 controls matched by age, sex, height, and body mass. Between-group comparisons were made for each measurement using data from an experienced podiatrist blinded to group assignment of the participants. Intrarater and interrater reliability was compared between all measurements using the first 15 participants from each group. RESULTS: Between-group comparisons showed that the individuals in the PFPS group had a more pronated foot posture when assessed by the foot posture index and longitudinal arch angle, and for all measurements relative to subtalar joint neutral. Foot posture index, normalized navicular drop, and calcaneal angle relative to subtalar joint neutral measurements also possessed high reliability in both groups when used by experienced raters. Reliability was not influenced by rater experience or the presence of PFPS for relaxed-stance foot posture measurements. Both tester inexperience and the presence of PFPS reduced reliability for all measurements of foot posture relative to subtalar joint neutral and measurement of weight-bearing ankle dorsiflexion. CONCLUSION: The foot posture index, normalized navicular drop, and calcaneal angle relative to subtalar joint neutral are all reliable and sensitive to group differences when used in a population with PFPS. Individuals with PFPS possess a more pronated foot posture and increased foot mobility compared to controls. Prospective evaluation of these measurements is now required to determine whether they contribute to the development of PFPS.

J Orthop Sports Phys Ther 2010;40(5):286-296, Epub 12 April 2010. doi:10.2519/jospt.2010.3227

KEY WORDS: aetiology, chondromalacia, knee, posture

STUDY DESIGN: Systematic literature review. OBJECTIVE: To evaluate the quality and scope of recently published systematic reviews on the topic of patellofemoral pain syndrome (PFPS) and to provide an overview of their findings. BACKGROUND: PFPS is a commonly treated condition. There is a large body of literature on conservative nonpharmacological interventions for PFPS, including multiple systematic reviews, which require critiquing and summarizing. METHODS AND MEASURES: A systematic review of systematic reviews on conservative nonpharmacological treatment strategies for PFPS was performed. Published systematic reviews were identified by searching MEDLINE, EMBASE, CINAHL, SPORTDISCUS, Current Contents, The Cochrane Library, and PEDro electronic databases from the year 2000 until May 2007. Cited reference searches of each author in the Web of Science complemented this search. Review quality was evaluated by a specifically designed scale and only high-quality reviews were retained to validate and summarize reported findings. RESULTS: Ten reviews met the inclusion criteria. Among them, only 3 were considered to be high quality, covering exercise, foot and knee orthoses, and ultrasound intervention for PFPS. None of the 3 reviews included literature published after the year 2001. Some limited evidence for the use of exercise, exercise combined with taping, and exercise combined with the use of a Protonics brace was found for treatment of individuals with PFPS. CONCLUSION: Published systematic reviews and clinical trials need to be conducted with more rigorous methodological design. There are no up-to-date, high-quality systematic reviews covering conservative nonpharmacological treatments for individuals with PFPS, which indicates that updates in all areas are needed. LEVEL OF EVIDENCE: Therapy, level 1a.

J Orthop Sports Phys Ther. 2008;38(9):529-541, published online 3 June 2008. doi:10.2519/jospt.2008.2861

KEY WORDS: exercise, literature, orthoses, physical therapy, ultrasound