Abstract
Kinesiophobia, the fear of physical movement and activity related to injury vulnerability, has been linked to sub-optimal outcomes following total knee replacement (TKR). This systematic review has two aims: to define the relationship between kinesiophobia and functional outcomes, pain and range of motion following TKR, and to evaluate published treatments for kinesiophobia following TKR. A primary search of electronic databases, grey literature, and trial registries was performed in March 2020. English-language studies recruiting adult primary TKR patients, using the Tampa Scale of Kinesiophobia (TSK) were included. Outcome measures were grouped into short (< 6months), medium (6-12months), and long term (> 12months). Study quality was assessed using the Newcastle Ottawa Scale for cohort or case control studies, and the Cochrane Collaboration Risk of Bias tool for randomised controlled trials. All thirteen included papers (82 identified) showed adequately low risk of methodological bias. TSK1 (activity avoidance) correlated with WOMAC functional score at 12months in three studies (r = 0.20 p < 0.05, R = 0.317 p = 0.001, and correlation coefficient 0.197 p = 0.005). TSK score significantly correlated with mean active range of motion (ROM) at 2weeks [65.98 (SD = 14.51) versus 47.35 (SD = 14.48) p = 0.000], 4weeks [88.20 (SD = 15.11) versus 57.65 (SD = 14.80) p = 0.000], and 6months [105.33 (SD = 12.34) versus 85.53 (SD = 14.77) p = 0.000] post-operation. Three post-operative interventions improved TSK score vs control following TKR: a home-based functional exercise programme [TSK -14.30 (SD = 0.80) versus -2.10 (SD = 0.80) p < 0.001], an outpatient cognitive behavioural therapy (CBT) programme [TSK 27.76 (SD = 4.56) versus 36.54 (SD = 3.58)], and video-based psychological treatment [TSK 24 (SD = 5) versus 29 (SD = 5) p < 0.01]. Kinesiophobia negatively affects functional outcomes up until 1year post-operatively, while active ROM is reduced up to 6months post-procedure. Post-operative functional and psychological interventions can improve kinesiophobia following TKR.
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