Bedwetting epidemiology and demographics
Bedwetting epidemiology and demographics On the Web
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Editor(s)-in-Chief: C. Michael Gibson, M.S.,M.D.  Phone:617-632-7753; Steven C. Campbell, M.D., Ph.D.,  Phone:216-444-5595 Professor of Surgery, Residency Program Director, Section of Urologic Oncology, Glickman Urological and Kidney Institute, Cleveland Clinic.
Bedwetting is the most common childhood urologic complaint  and one of the most common pediatric-health issues. Most bedwetting, however, is just a developmental delay—not an emotional problem or physical illness. Only a small percentage (5% to 10%) of bedwetting cases are caused by specific medical situations. Bedwetting is frequently associated with a family history of the condition. Most girls can stay dry by age six and most boys stay dry by age seven. By ten years old, 95% of children are dry at night. Studies place adult bedwetting rates at between 0.5% to 2.3%.
Epidemiology and Demographics
Males are more likely to wet the bed than females. Males make up 60% of bed-wetters overall and make up more than 90% of those who wet nightly (Schmitt, 1997).
Doctors frequently consider bedwetting as a self-limiting problem, since most children will grow out of it.
Approximate bedwetting rates are:
- Age 5: 20%
- Age 6: 10 to 15%
- Age 7: 7%
- Age 10: 5%
- Age 15: 1-2%
- Age 18-64: 0.5%-1% 
Children 5 to 9 years old have a spontaneous cure rate of 14% per year. Adolescents 10 to 18 years old have a spontaneous cure rate of 16% per year.
As can be seen from the numbers above, 5% to 10% of bedwetting children will not outgrow the problem, leaving 0.5% to 1% of adults still dealing with bedwetting. Individuals who are still enuretic at age 18 are likely to deal with bedwetting throughout their lives. Adult rates of bedwetting show little change due to spontaneous cure. 
Studies of bedwetting in adults have found varying rates. The most-quoted study in this area was done in the Netherlands. It found a 0.5% rate for 18-64 year olds. A Hong Kong study, however, found a much higher rate. The Hong Kong researchers found a bedwetting rate of 2.3% in 16 to 40 year olds. 
- Reynoso Paredes, MD, Potenciano. "Case Based Pediatrics For Medical Students and Residents". Department of Pediatrics, University of Hawaii John A. Burns School of Medicine. Retrieved 2010-05-28.
- "Nocturnal Enuresis". UCLA Urology. Retrieved 2010-05-28.
- Johnson, Mary. "Nocturnal Enuresis". www.duj.com. Archived from the original on 2008-01-22. Retrieved 2008-02-02.
- "Bedwetting". The Royal Childrens Hospital Melbourne. Retrieved 2009-10-20.
- "Pediatrics". www.pediatriceducation.org. Retrieved 2008-02-02. Text " Paediatrics " ignored (help); Text " Pediatric Education " ignored (help); Text " Paediatric Education - PediatricEducation.org" ignored (help)