title: Impairments of postural stability, core endurance, fall index and functional mobility skills in patients with patello femoral pain syndrome.
abstract: Postural control allows performance of daily and sports activities. The previous studies show that postural sway inceases in orthopaedic injuries such as osteoarthritis and total knee arthroplasty.
  To compare postural sway, risk of falling and function between individuals with and without patellofemoral pain syndrome (PFS).
  This study included 22 subjects with patellofemoral pain syndrome, age-matched pain-free 22 females serving as a control group. Visual anolog scale and Kujala were used to evaluate the pain. Posturographic assesment was performed by Tetrax posturographic device. Biering Modified Sorenson test for extensor endurance and sit-up test for flexor endurance were used for the evaluation of trunk endurance. Timed get-up and go test was used for lower extremity function. The Student's t Test was used to compare variables between the groups. The Pearson correlation coefficients were calculated to examine correlation between the quantitative variables.
  Postural sway included eyes open without pillow, eyes open on pillow, eyes closed on pillow, risk of falling, function and postural stabilization included flexor endurance, extansor endurance are impared in patient with patellofemoral pain syndrome when compare to controls. In subjects with PFPS increased postural sway significantly associated with body mass index (r= 0.52), pain duration (r= 0.43), postural control (extansor endurance) (r= -0.50) and risk of falling (r= 0.62) on pillow with open eyes. In addition we found function significantly related with postural control (extansor endurance and flexor endurance) (r= -0.59 and r= -0.59) and risk of falling (r= 0.77).
  Decreased neuromuscular control of the trunk core and increased postural sway and falling risk were found in patients with PFPS. Patients may be evaluated for deficits in postural control and falling risk before treatment.
authors.affiliation: School of Physiotherapy and Rehabilitation, Turgut Özal University, Ankara, Turkey.
authors.forename: Gul Deniz
authors.initials: GD
authors.lastname: Yilmaz Yelvar
authors.affiliation: School of Physiotherapy and Rehabilitation, Turgut Özal University, Ankara, Turkey.
authors.forename: Yasemin
authors.initials: Y
authors.lastname: Çirak
authors.affiliation: School of Physiotherapy and Rehabilitation, Turgut Özal University, Ankara, Turkey.
authors.forename: Murat
authors.initials: M
authors.lastname: Dalkilinç
authors.affiliation: School of Physiotherapy and Rehabilitation, Turgut Özal University, Ankara, Turkey.
authors.forename: Yasemin Parlak
authors.initials: YP
authors.lastname: Demir
authors.affiliation: Department of Physiotherapy and Rehabilitation, Güven Hospital, Ankara, Turkey.
authors.forename: Gul
authors.initials: G
authors.lastname: Baltaci
authors.affiliation: Ulusoy plaza (Hekim Center), Ankara, Turkey.
authors.forename: Mahmut
authors.initials: M
authors.lastname: Kömürcü
keywords: Patellofemoral pain syndrome; falling; function; postural control; postural sway