Resection and Resolution of Bone Marrow Lesions Associated with an Improvement of Pain after Total Knee Replacement: A Novel Case Study Using a 3-Tesla Metal Artefact Reduction MRI Sequence

Table 1

Pre- and postoperative questionnaires.

Assessment	Questionnaire	Comments
Pain severity	Visual Analogue Scale (VAS)	Used to categorise individuals with high or low pain. Scores range from 0 to 100, with score ≥ 60 representing high pain intensity.
Pain catastrophizing	Pain Catastrophizing Scale (PCS)	This 13-item scale uses questions about coping with pain. Scores range from 0 to 52 with a higher score seen in individuals that are high catastrophizers.
Depression	Beck Depression Inventory (BDI)	21-question assessment rating inventory attitudes and symptoms of depression. The score ranges from 0 to 63 with a score ≥ 19 indicative of clinical depression.
Anxiety	State-Trait Anxiety (STAI)	Assesses how patients feel and reflects situational factors, which influence anxiety levels. Scores range from 20 to 80 with higher scores associated with higher anxiety.
Neuropathic pain-like symptoms	PainDetect	Individuals are categorised as having neuropathic pain based on the results of a joint-specific version of the PainDetect questionnaire. Scores range from 0 to 39 with a score > 12 indicating possible neuropathic pain and a score ≥ 19 indicating likely neuropathic pain.
Pain and function of the knee	Oxford Knee Score (OKS)	A 12-item questionnaire that assesses pain and function of the knee. Scores range from 0 to 48 with a lower score indicating severe knee arthritis or pain and reduced function in the knee. A higher score between 40 and 48 indicated satisfactory joint function. A minimally clinically important difference of 4 points on the scale can be used to assess the results of an intervention, for example, pain relief or TKR surgery.