[Seasonal effect of age, sex and drinking water composition on nephritic colic].

The influence of the season, age, sex and composition of the drinking water on the incidence of kidney colics in patients of different villages, attended at the "San Cecilio" Clinical Hospital in Granada, is assessed. The average, of kidney colics per 1.000 inhabitants was 4.2% with 51.27% in females and 48.73% in males. We found that in the summer months the frequency of kidney colics was double that in the winter months, which may be due to a relative D hypervitaminosis, a greater intake of oxalates or a relative dehydration. No influence of the calcium, magnesium, chlorine and sulphate contents of the water, was detected. In some villages, a high calcium and magnesium content in the water, posed problems for the urolithogenic prophylaxis in some patients.