Sensory Characteristics and Psychosocial Factors Related With Non-specific Neck Musculoskeletal Pain Chronification

It is a 10-item questionnaire that measures a patient's self-reported neck pain related disability. Questions include activities of daily living, such as: personal care, lifting, reading, work, driving, sleeping, recreational activities, pain intensity, concentration and headache. The 10 item scores are then summed to yield a global NDI score, which has a range of 0-50 where higher values reflect greater neck disability. 1 and 6-month results were subtracted from baseline. As such, positive change scores for neck disability indicate improvement

The purpose of the QuickDASH is to use 11 items to measure physical function and symptoms in people with any or multiple musculoskeletal disorders of the upper limb. The QuickDASH is a widely used reference of self reported disability. The 11 item scores are then summed to yield a global QuickDASH score, which has a range of 11-100 where higher values reflect greater shoulder/arm disability. 1 and 6-month results were subtracted from baseline. As such, positive change scores for shoulder/arm disability indicate improvement

Pressure pain threshold (PPT) is defined as the minimum force applied which induces pain. This measure has proven to be commonly useful in evaluating tenderness symptom.

Temporal summation is a clinical measure of central sensitization in which a high frequency of action potentials in the presynaptic neuron elicits postsynaptic potentials that overlap and summate with each other.

Participants have to draw on a tablet-based digital body chart (NavigatePain©, Aalborg University, Aalborg, Denmark) the body region in which they felt pain more frequently during the previous month. The use of pain drawings has been found to be reliable in chronic low back, neck, shoulder, and arm pain. Digital pain drawings have also been shown reliable, valid and comparable to paper drawings and useful in clinical population. The size of the pain area was extracted and expressed in pixels.

Self-perceived neck pain will record using a Visual Analogue Scale (VAS). Participants have to mark on a 10-cm line their average current neck pain between 0 ("no pain") and 10 ("worst possible pain"). The VAS is a reliable and valid measurement of pain

Duration of pain in months

People are asked to indicate the degree to which they have the above thoughts and feelings when they are experiencing pain using the 0 (not at all) to 4 (all the time) scale. A total score is yielded (ranging from 0-52), along with three subscale scores assessing rumination, magnification and helplessness.

Tampa Scale for Kinesiophobia (TSK) The TSK is a 17-item self-report measure of fear of movement and (re)injury. Four of the items are negatively worded and reversed scored (4, 8, 12, and 16). Ratings are summed to yield a total score where higher values reflect greater fear of (re)injury. The 17 item scores are then summed to yield a global TSK score, which has a range of 11-44.

The EQ-5D is a frequently used generic quality of life questionnaire, designed by the EuroQoL. The EQ-5D-5L is an instrument widely used to measure and evaluate general health status. The EQ-5D-5L descriptive system describes general health in terms of five dimensions: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. Each dimension has five levels, indicating no problems, slight problems, moderate problems, severe problems, and extreme problems resulting in a total of 3,125 unique health states. Besides, the EQ-5D-5L also includes a visual analogue scale (EQ-VAS), which recorded the patient's self-rated health on a 20 cm vertical, visual analogue scale with endpoints (0; 100) labeled 'the best health you can imagine' and 'the worst health you can imagine'

he Perceived Stress Scale (PSS) inquire about feelings and thoughts that tap the degree to which respondents find their current life situation unpredictable, uncontrollable and stressful. Respondents indicate how often in the past month they have felt or thought a certain way on a 5-point Likert scale (0 = never, 1 = almost never, 2 = sometimes, 3 = fairly often, 4 = very often). The higher the score the higher the perceived stress is. The 14 item scores are then summed to yield a global PSS score, which has a range of 0-56

PSQI consists of 19 self-rated questions. The 19 self-rated questions asses a wide variety of factors relating to sleep quality, including estimates of sleep duration and latency and of the frequency and severity of specific sleep-related problems. Theses 19 items are grouped into seven component scores, each weighted equally on a 0-3 scale. The seven component scores are then summed to yield a global PSQI score, which has a range of 0-21; higher scores indicate worse sleep quality.

The DASS is a self-report measure, designed to assess the unique and unrelated aspects of anxiety and depression, as well as a third construct (termed stress) that assesses the features common to anxiety and depression. The DASS-21 is comprised of three scales, Depression, Anxiety, and Stress, each of which consists of 7 items. The 21 item scores are then summed to yield a global DASS-21 score, which has a range of 0-63