Use of Waddell's signs
Waddell, ''et al''. (1980) described five categories of signs: * Tenderness tests: superficial and diffuse tenderness and/or nonanatomic tenderness * Simulation tests: these are based on movements which produce pain, without actually causing that movement, such as axial loading and pain on simulated rotation * Distraction tests: positive tests are rechecked when the patient's attention is distracted, such as a straight leg raise test * Regional disturbances: regional weakness or sensory changes which deviate from accepted neuroanatomy * Overreaction: subjective signs regarding the patient's demeanor and reaction to testing Any individual sign marks its category as positive. When three or more categories were positive, the finding was considered clinically significant. However, assessing the patient on the basis of overreaction has raised concerns regarding observer bias and idiosyncrasies related to the patient's culture. Consequently, a practitioner may assess the patient on the remaining four categories, with two or more positive categories being considered clinically significant. One or two Waddell's signs can often be found even when there is not a strong non-organic component to pain. Three or more are positively correlated with high scores for depression, hysteria and hypochondriasis on the Minnesota Multiphasic Personality Inventory.Criticism
Although Waddell's signs can detect a non-organic component to pain, they do not exclude an organic cause. Clinically significant Waddell scores are considered indicative only of symptom magnification or pain behavior, and have been misused in medical and medico-legal contexts. Waddell's signs are not considered a ''de facto'' indicator of deception for the purpose of financial gain. In a 2003 review, Fishbain, ''et al''. stated that Waddell's signs do not reliably distinguish organic from psychological pain but instead tend to underestimate the amount of pain that is actually experienced. In a 2004 review, Fishbain, ''et al''. concluded, "there was little evidence for the claims of an association between Waddell signs and secondary gain and malingering. The preponderance of the evidence points to the opposite: no association". In 2010, a neuroanatomical basis of Waddell's signs has been proposed which argues that since the brain is organic, and even society is composed of a group of organic beings, the term "nonorganic" should be replaced by a term put forward by Chris Spanswick in 1997, "behavioral responses to physical examination." With the possible exception of cogwheel rigidity, these are best understood as neuroanatomical maladaptations to long-continued pain and, as Waddell and colleagues have stressed, do not indicate faking or malingering but rather that there are psychosocial issues that mitigate against successfully treating low back pain by lumbar discectomy, and which in themselves require other treatment.Ranney, DA. A Proposed Neuroanatomical Basis of Waddell's Nonorganic Signs, Am J Phys Med Rehabil 2010;89: 1036-1042.References
{{DEFAULTSORT:Waddell's Signs Medical signs Musculoskeletal examination