Hypothesis:the effect of bladdertraining in groups for patients with OAB (overactive bladder syndrome) equals the effect of bladdertraining individually for patients with overactive bladder.

The effect of the training is measured in a 3 dimensional scope by the means of 3 primary outcome measures used in the statistical evaluation. Symptoms of OAB (either (1)urgencyepisodes or (2)urgencyincontinence) and (3)quality of life (VAS score).

Program consisting of 3 hourly sessions with bladdertraining and daily training with a pocket bladder schedule. patients are randomised either for groups or individual training with a continence nurse over a period of 2 months.

Inclusion Criteria:

• women at the age of 18 and more
• patients with overactive bladder

Exclusion Criteria:

• dominance of stress incontinence
• not able to attend sessions
• do not to understand danish
• do not want training in groups or individual
• hormonebalanced (if postmenopausal with added hormonetreatment for at least 2 months)
• no treatment for OAB up till 1 month before study and during study
• no renal or neurological diseases, symptomatic cystitis or non regulated diabetes
• no pregnancy during study
• no normal gynecological examination
• no operation in pelvis up till 3 month before studystart
• no polyuria measured 2 times before studystart (> 40 ml/ kg/ day)
• no upstart of treatment with medication during studystart which according to the investigator can create symptoms of OAB
• no participation in other CT