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The probability of CTS estimated from symptoms vs neurophysiological severity of CTS in 2,695 subjects with hand symptoms. The probability of CTS (vertical axis) is derived from the algorithms used on www.carpal-tunnel.net. The higher the score, the more typical of CTS is the patient’s presentation. (As the degree of NCS abnormality increases it becomes more likely that a clinician will recognize the problem as CTS.) The neurophysiological severity was assessed as in Bland (2000a).
