Description: The Neck Pain and Disability Scale (NPDS or NPAD) is a questionnaire aiming to quantify neck pain and disability.1 It is a patient-reported outcome measure for patients with any type of neck pain, of any duration, with or without injury.1,2 It consists of 20 items: three related to pain intensity, four related to emotion and cognition, four related to mobility of the neck, eight related to activity limitations and participation restrictions and one on medication.1,3 Patients respond to each item on a 0 to 5 visual analogue scale of 10 cm. There is also a nine-item short version.4 Feasibility: The NPDS is published and available online (https://mountainphysiotherapy.com.au/wp-content/uploads/2016/08/Neck-Pain-and-Disability-Scale.pdf).1 The NPDS is an easy to use questionnaire that can be completed within 5 to 8 minutes.1,5 There is no training needed to administer the instrument but its validity is compromised if the questionnaire must be read to the patient.2 Higher scores indicate higher severity (0 for normal functioning to 5 for the worst possible situation ‘your’ pain problem has caused you).2 The total score is the sum of scores on the 20 items (0 to 100).1 The maximum acceptable number of missing answers is three (15%).4 Two studies found a minimum important change of 10 points (sensitivity 0.93; specificity 0.83) and 11.5 points (sensibility 0.74; specificity 0.70), respectively.6,7 The NPDS is available in English, Dutch, Finnish, French, German, Italian, Hindi, Iranian, Korean, Turkish, Japanese and Thai. Reliability and validity: Two systematic reviews have evaluated the clinimetric properties of 11 of the translated versions.5,8 The Finnish, German and Italian translations were particularly recommended for use in clinical practice. Face validity was established and content validity was confirmed by an adequate reflection of all aspects of neck pain and disability.1,8 Regarding structural validity, the NPDS is a multidimensional scale, with moderate evidence that the NPDS has a three-factor structure (with explained variance ranging from 63 to 78%): neck dysfunction related to general activities; neck pain and neck-specific function; and cognitive-emotional-behavioural functioning. 4,5,9 A recent overview of four systematic reviews found moderate-quality evidence of high internal consistency (Cronbach’s alphas ranging from 0.86 to 0.93 for the various factors).10 Excellent test-retest reliability was found (ICC of 0.97); however, the studies were considered to be of low quality.3,10 Construct validity (hypotheses-testing) seems adequate when the NPDS is compared with the Neck Disability Index and the Global Assessment of Change with moderate to strong correlations (r = 0.52 to 0.86), based on limited moderate-quality studies.3,11,12 One systematic review reported good responsiveness to change in patients (r = 0.59).12
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Studies about clinical pain in schizophrenia are rare. Conclusions on pain sensitivity in people with schizophrenia are primarily based on experimental pain studies. This review attempts to assess clinical pain, that is, everyday pain without experimental manipulation, in people with schizophrenia. PubMed, PsycINFO, Embase.com, and Cochrane were searched with terms related to schizophrenia and pain. Methodological quality was assessed with the Mixed Methods Appraisal Tool. Fourteen studies were included. Persons with schizophrenia appear to have a diminished prevalence of pain, as well as a lower intensity of pain when compared to persons with other psychiatric diseases. When compared to healthy controls, both prevalence and intensity of pain appear to be diminished for persons with schizophrenia. However, it was found that this effect only applies to pain with an apparent medical cause, such as headache after lumbar puncture. For less severe situations, prevalence and intensity of pain appears to be comparable between people with schizophrenia and controls. Possible underlying mechanisms are discussed. Knowledge about pain in schizophrenia is important for adequate pain treatment in clinical practice. Perspective This review presents a valuable insight into clinical pain in people with schizophrenia
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Purpose To empirically define the concept of burden of neck pain. The lack of a clear understanding of this construct from the perspective of persons with neck pain and care providers hampers adequate measurement of this burden. An additional aim was to compare the conceptual model obtained with the frequently used Neck Disability Index (NDI). Methods Concept mapping, combining qualitative (nominal group technique and group consensus) and quantitative research methods (cluster analysis and multidimensional scaling), was applied to groups of persons with neck pain (n = 3) and professionals treating persons with neck pain (n = 2). Group members generated statements, which were organized into concept maps. Group members achieved consensus about the number and description of domains and the researchers then generated an overall mind map covering the full breadth of the burden of neck pain. Results Concept mapping revealed 12 domains of burden of neck pain: impaired mobility neck, neck pain, fatigue/concentration, physical complaints, psychological aspects/consequences, activities of daily living, social participation, financial consequences, difficult to treat/difficult to diagnose, difference of opinion with care providers, incomprehension by social environment, and how person with neck pain deal with complaints. All ten items of the NDI could be linked to the mind map, but the NDI measures only part of the burden of neck pain. Conclusion This study revealed the relevant domains for the burden of neck pain from the viewpoints of persons with neck pain and their care providers. These results can guide the identification of existing measurements instruments for each domain or the development of new ones to measure the burden of neck pain.
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