Abstract
Based on questionnaires and level of 25(OH)D in 466 children under 1 year
factors for rickets was identified. Reliable factors were iron deficiency anemia during
pregnancy, toxemia of pregnancy of the mother and the lack of vitamin D during first year
of life of a child, lack of outdoor stay (less then 20 minutes per day), frequent colds, not
effective traditional prevention of rickets vitamin D
