Aims
 Detect indicators for bladder-sfincter dysfunctions and
   associated recurrent urinary tract infections (UTI)
Prevent renal scars in children by early treatment
 Study the influence of potty-training on the maturation of the
   urinary system in order to prevent dysfunctions
Methods
 4332 children ( 2215 boys,, 2117 girls, mean age 11,5 ± 0,5 years)
 Questionnaires with 43 questions on toilet behaviour and potty-
   training