Children at Risk
Bedwetting occurs in 40% of 3-year-olds, 30% of 4-year-olds, 20% of 5-year olds and 5% of l0-year olds. Enuresis is not considered to be a problem until the child is 5 or 6 years old.
Boys are more likely than girls to have enuresis, and the gender difference remains consistent. At age 18, the prevalence is 1% for males and less for females.
Heredity may also be a factor, since many children who wet the bed have a parent who may have also wet the bed. Approximately 75% of all children with enuresis have a first-degree biological relative who has it. If one identical twin has enuresis, 68% of the time the other twin will also have enuresis.