Birth prevalence of congenital malformations in Bavaria, Germany, after the Chernobyl accident.

This study considers whether or not exposure to radioactive fallout from the Chernobyl accident led to an increased prevalence of congenital malformations in infants born in Bavaria, the German state with the highest levels of contamination after the accident. The odds ratios for major malformations after the accident relative to before were used as indicators for adverse health effects. Since measurements of caesium in soil showed that contamination was considerably higher in Southern Bavaria than in Northern Bavaria, the odds ratios were calculated for both regions separately. Analysis did not show a significant increase in any of the odds ratios of the selected malformations in Southern Bavaria as compared to Northern Bavaria. Consequently, this study provides no evidence that radiation from Chernobyl caused an increase in the birth prevalence of major congenital malformations.