DIABETES - The interaction between carpal tunnel syndrome and diabetes is complicated. It is generally believed that CTS is commoner in diabetic individuals, whether or not there are other diabetic nerve complications. Diabetic patients are prone to a complex of hand problems including Duputren's contracture, trigger digits and stiff fingers - sometimes termed 'diabetic hand' (See the page - The Triad ). It also appears to be the case that diabetic patients get slightly different symptoms from CTS compared to non-diabetic patients. Several studies have found that diabetic patients tend to present with more severe neurophysiological abnormalities, eg (Jenkins 2012) , so multivariate statistics are required to determine whether diabetes itself has an effect on the outcome of surgery. The existing data is contradictory and as usual many studies are small with inadequate power to do the necessary statistics. The topic has been the subject of a recent review in the Journal of Hand surgery (Brown 2011) . To illustrate the difficulty, consider the following ten papers about 8 study populations:
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