Seasonal variation in prevalence of carpal tunnel syndrome

: The influence of cold temperatures on neuropathies has been reported previously, but its impact on carpal tunnel syndrome ( CTS ) is not well analyzed. Methods : We analyzed the frequency of CTS among neurophysiological evaluations according to seasonal variation in 9574 consecutive patients (4260 with CTS ). Results : A higher frequency of CTS was found in the winter (50.8%), and the lowest number for CTS diagnosis was found in the summer (38.9%). In both autumn and spring the prevalence remained stable at an intermediate level between summer and winter at 42.8% and 43.5%, respectively. Conclusion : CTS frequency was much higher in winter in this center. Muscle Nerve 47: 925–927, 2013