EFFECT OF VARIATIONS IN CLIMATE AND CALEN DER ON ONSET OF MIGRAINE HEADACHE

Several factors have been demonstrated to play a role in triggering ac ute episode of migraine headache. On the basis of observation, others have been suggested but not confirmed. Variations in climate are among the latter. Over a one-year period, we observed a population of 304 p atients with migraine residing in a precise climatic zone. The frequen cy of acute episodes could be analyzed for among them. There were 4421 acute episodes, recorded during the year. The periodicity during the year was compared with climate parameters: temperature (maximal, minim al, average), wind (force and direction), atmospheric pressure, rain, sunshine, relative humidity, and icy, foggy and stormy weather. Moon c ycles were also assessed. No correlations were found between climate p arameters or variations there of and onset of migraine, Variations in climate would thus appear to have no effect on migraine. Inversely, th e results of this study demonstrated a day effect with a higher number of episodes on Saturday and less on Monday and Tuesday. The triggerin g effect of catamenia on many acute episodes was also confirmed.