1. Pain perception in chronic knee osteoarthritis with varying levels of pain inhibitory control: an exploratory study
- Author
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Swapnali Chaudhari, Hanan Ibrahim Zehry, Laura Dipietro, Paulo E P Teixeira, and Felipe Fregni
- Subjects
Adult ,Male ,Pain Threshold ,medicine.medical_specialty ,media_common.quotation_subject ,Osteoarthritis ,law.invention ,Diffuse Noxious Inhibitory Control ,03 medical and health sciences ,0302 clinical medicine ,Quality of life ,Randomized controlled trial ,law ,Perception ,medicine ,Humans ,Depression (differential diagnoses) ,Pain Measurement ,media_common ,030203 arthritis & rheumatology ,business.industry ,Chronic pain ,Pain Perception ,Middle Aged ,Osteoarthritis, Knee ,medicine.disease ,Cross-Sectional Studies ,Anesthesiology and Pain Medicine ,Mood ,Brain stimulation ,Quality of Life ,Physical therapy ,Female ,Neurology (clinical) ,business ,030217 neurology & neurosurgery - Abstract
Background and aimsPain is a disabling symptom in knee osteoarthritis (KOA) and its underlying mechanism remains poorly understood. Dysfunction of descending pain modulatory pathways and reduced pain inhibition enhance pain facilitation in many chronic pain syndromes but do not fully explain pain levels in chronic musculoskeletal conditions. The objective of this study is to explore the association of clinical variables with pain intensity perception in KOA individuals with varying levels of Conditioned Pain Modulation (CPM) response.MethodsThis is a cross-sectional, exploratory analysis using baseline data of a randomized clinical trial investigating the effects of a non-invasive brain stimulation treatment on the perception of pain and functional limitations due to KOA. Sixty-three subjects with KOA were included in this study. Data on pain perception, mood perception, self-reported depression, physical function, quality of life, and quantitative sensory testing was collected. Multiple linear regression analysis was performed to explore the association between the clinical variables with pain perception for individuals with different levels of CPM response.ResultsFor KOA patients with limited CPM response, perception of limitations at work/other activities due to emotional problems and stress scores were statistically significantly associated with pain scores, F(2, 37) = 7.02,p p ConclusionsPain intensity perception is associated differently with clinical variables according to the individual CPM response. Mechanistic models to explain pain perception in these two subgroups of KOA subjects are discussed.
- Published
- 2020