The purpose of this study is to test whether adding a treatment using pain neuroscience education (PNE) and coping skills training (CST) to usual care, in subjects with knee osteoarthritis and pain catastrophizing, who are scheduled for a total knee arthroplasty (TKA), is more effective than only usual care. There is a high evidence level of different systematic reviews, which support the efficacy of physiotherapy treatments combined with behavioural techniques aimed to reduce pain catastrophism, pain and disability in other pathologies. The primary aim of that kind of interventions is to help the subjects to reconceptualise its own pain understanding and its role on the recovery process, as well as promoting an increase of activity and encourage the subject to resume its usual activity instead of continuing to avoid it.
The prevalence of TKA has increased dramatically during the last two decades, its popularity can be attributed to its evident success regarding pain improvement, deformity correction and disability reduction in knee osteoarthritis subjects. However, only a third of the patients report no functional problems after surgery, the 20% of then are unsatisfied with its functional skills and around a 20% are experiencing pain, high disability degrees and a significant quality of life reduction. This results cannot be fully explained by mechanical processes, surgical procedures or surgery variations, but it seems to be related to other psychological aspects. Chronic pain subjects often develop maladaptative thoughts and behaviours (i.e. pain catastrophism, Kinesiophobia, activity avoidance) which contribute to make the subject suffer physically as well as emotionally, and affect on the intensity and persistency of pain. Although many psychosocial factors have been studied, pain catastrophism has emerged as one of the most important predictors for persistent pain after a total knee arthroplasty, as well as its severity and duration, that's why it is getting more importance when it comes to study chronic pain in this subjects. Reducing pain catastrophism has become a key factor to determine the success in the rehabilitation of some maladies accompanied by pain, considering that its reduction has been associated with the clinical improvement of pain itself. It has been observed that treatments using psychological and psychosocial interventions, therapeutic education and coping skills training, or physical therapy and therapeutic exercise, are effective techniques to reduce pain catastrophism. Nevertheless, it's still necessary to determine whether the maladaptative pain related thoughts approach, using physical therapy and behavioural techniques, are able to reduce the risk of suffering postoperative chronic pain.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
The biomedical education session will be imparted 2 weeks before surgery by the preoperative nurse and a physiotherapist. It will have a duration of 2 hours and it is designed for a group of 5 subjects. The hospital rehabilitation starts 6 hours after surgery, and it is based in early wandering stimulation, articular mobility exercises and isometric exercises.
The PNE and CST program will be divided in 3 individual sessions.
Hospital Clínic de Barcelona
Barcelona, España, Spain
Quality of life. Changes from Baseline to 6 months
Participants will be asked to complete the Euro Quality of Life (QoL) Score (EQ-5D) (Spanish version),
Time frame: Baseline, 3 and 6 months after surgical intervention
Disability / limitations
Western Ontario and McMaster University Osteoarthritis Index (WOMAC) (Spanish version) will be used to assess patient´s physical function. This questionnaire can be completed in less than 5 minutes. It's a widely used, reliable, valid and responsive measure of outcome in people with osteoarthritis of the hip or knee.
Time frame: Baseline, 3 and 6 months after surgical intervention
Pain intensity
Participants will be asked to rate their pain on a horizontal 100-mm Visual Analogue Scale (VAS). The horizontal line anchors will be "no pain" and "worst imaginable pain". The VAS is a valid and reliable instrument compared with other pain rating scales, and has been well established in clinical practice and research for measuring pain levels in arthritis populations.
Time frame: Baseline, 3 and 6 months after surgical intervention
Function
30-Second Chair Stand Test will be use to evaluate patient's functionality on standing, because it is a well-recognized test to detect early declines in functional independence.
Time frame: Baseline, 3 and 6 months after surgical intervention
Range of Motion
Goniometric assessments of knee will be carried out to assess flexion and extension range of motion.
Time frame: Baseline, 3 and 6 months after surgical intervention
Neuropathic Pain
Participants will be asked to complete Self-Administered Leeds Assessment of Neuropathic Symptoms and Signs (S-LANSS) (Spanish version).
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Time frame: Baseline, 3 and 6 months after surgical intervention
Pain Catastrophizing
Participants will be asked to complete the Pain Catastrophizing Scale (PCS) (Spanish version).
Time frame: Baseline, 3 and 6 months after surgical intervention
Kinesiophobia
Participants will be asked to complete the Tampa Scale for Kinesiophobia (TSK-11) (Spanish version).
Time frame: Baseline, 3 and 6 months after surgical intervention
Self-efficacy
Participants will be asked to complete the Chronic Pain Self-Efficacy Scale (Spanish version).
Time frame: Baseline, 3 and 6 months after surgical intervention
Self-coping ability
Participants will be asked to complete the "Cuestionario de Afrontamiento ante el Dolor Crónico - Versión Reducida" (CAD-R)), a Spanish questionnaire to asses self-coping ability.
Time frame: Baseline, 3 and 6 months after surgical intervention
Depression and anxiety
Participants will be asked to complete the Hospital Anxiety and Depression Scale (HADS) (Spanish version) will be used.
Time frame: Baseline, 3 and 6 months after surgical intervention