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Osteoarthritis (OA) is the most common form of arthritis and for 4 in 10 people pain from OA is not adequately controlled. The pain experience of people suffering from chronic pain largely depends on their individual perception of pain and on brain functions, in particular what is called "cognitive" functions. Cognitive functions include memory, attention, organisation and planning, task initiation, regulation of emotions and reflection of oneself and are important for everyday tasks, such as following a conversation or a story in a book or on TV, learning new things, remembering old and new information and making decisions. Good cognition predicts the risk of developing chronic pain after a painful event, such as surgery. Chronic pain patients report numerous cognitive impairments, with attention and memory being the two most prominent that can persist even after the original cause of pain has been treated. Little evidence exists regarding the nature and magnitude of these deficits and their underlying brain and psychological mechanisms in chronic knee OA. The investigators want to understand which cognitive functions and to what extent are associated with pain in patients with knee OA.
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Osteoarthritis (OA) is the most common form of arthritis and for 4 in 10 people pain from OA is not adequately controlled. The pain experience of people suffering from chronic pain largely depends on their individual perception of pain and on brain functions, in particular what is called "cognitive" functions. Cognitive functions include memory, attention, organisation and planning, task initiation, regulation of emotions and reflection of oneself and are important for everyday tasks, such as following a conversation or a story in a book or on TV, learning new things, remembering old and new information and making decisions. Good cognition predicts the risk of developing chronic pain after a painful event, such as surgery. Chronic pain patients report numerous cognitive impairments, with attention and memory being the two most prominent that can persist even after the original cause of pain has been treated. Little evidence exists regarding the nature and magnitude of these deficits and their underlying brain and psychological mechanisms in chronic knee OA. The investigators want to understand which cognitive functions and to what extent are associated with pain in patients with knee OA. Identifying specific domains of cognitive function affected by chronic pain has a clinical utility; specific domains regulate certain aspects of activities of daily living, such as managing personal finances, grocery shopping, remembering to take medications and, thus, dealing with pain early in the disease course could prevent subsequent cognitive loss and long-term pain. To do this the investigators will examine the link between measures of pain and measures of cognition in people with knee OA. The investigators propose to measure knee pain, physical function, sleep quality and overall wellbeing with questionnaires and pain sensitivity measures. The investigators will measure cognition with questionnaires and computer-based tasks testing aspects of cognitive function, including memory and attention. The investigators will compare the questionnaire and pain sensitivity measures with questionnaire and measures of cognitive function in the same participants. The investigators will include tests of various aspects of a person's memory that will facilitate the establishment of which aspects are related to chronic pain. The investigators hypothesise that chronic pain is linked to specific cognitive deficits in patients with knee OA and managing pain, for example, with mild to moderate targeted exercise and healthy diet, may limit the risk of memory loss and dementia and, in turn, predict better treatment outcomes.
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