We have undertaken a large case-control study using the UK General Practice Research Database to quantify the relative contributions of the common risk factors for carpal tunnel syndrome (CTS) in the community. Cases were patients with a diagnosis of CTS and, for each, four controls were individually matched by age, sex and general practice. Our dataset included 3,391 cases, of which 2,444 (72%) were women, with a mean age at diagnosis of 46 (range 16-96) years. Multivariate analysis showed that the risk factors associated with CTS were previous wrist fracture (OR=2.29), rheumatoid arthritis (OR=2.23), osteoarthritis of the wrist and carpus (OR=1.89), obesity (OR=2.06), diabetes (OR=1.51), and the use of insulin (OR=1.52), sulphonylureas (OR=1.45), metformin (OR=1.20) and thyroxine (OR=1.36). Smoking, hormone replacement therapy, the combined oral contraceptive pill and oral corticosteroids were not associated with CTS. The results were similar when cases were restricted to those who had undergone carpal tunnel decompression.
Dupuytren's is a common problem, but little is known about its aetiology. We have undertaken a large case-control study to assess and quantify the relative contributions of diabetes and epilepsy as risk factors for Dupuytren's in the community. Cases were patients with a diagnosis of Dupuytren's disease and, for each, two controls were individually matched by age, sex, and general practice. Our dataset included 821 cases and 1,642 controls. Five hundred and eighty-eight (72%) of the cases were men. The mean age at diagnosis was 62 (range 24-97) years. Diabetes was a significant risk factor for Dupuytren's disease (OR=1.75) and there was an increased risk for medicinally treated diabetes (metformin--OR=3.56; sulphonylureas--OR=1.75) and particularly insulin controlled (OR=4.38) rather than diet-controlled diabetes. Epilepsy (OR=1.12) and anti-epileptic medications were not associated with Dupuytren's disease. Ascertainment bias in previous studies may explain the reported association with epilepsy.
The NCS has been proven to be a valid, reliable and sensitive outcome measure that accurately measures the level of function and disability in the ACJ, SCJ and clavicle after traumatic injury and in degenerative disease.
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