Hussong J, et al. - Researchers analyzed parental questionnaire data of 3,875 preschool children in order to evaluate the rate of preschool children with delayed or regular continence, the mean age of gaining continence, psychiatric problems and quality of life in a nation-wide, representative sample. Delayed gaining of continence were shown in 16.9% of children. Percentages of children with nighttime bladder continence were lower for boys (76.3%) in contrast with girls (80.6%) and lower for children without (78.2%) in contrast with a migration status (79.2%). It was found that the gender, German region, and migration status was moderated the age at gaining of continence. Delayed achievement of continence was correlated with more psychological problems and a lower quality of life. Moreover, the results of this study had emphasized the significance of effective treatment of incontinence.