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Four GPs were randomly assigned to the intervention group (132 patients) and seven to the control group (212 patients). The percentage of patients referred to urologists did not differ significantly between the intervention group vs the control group within 3 months 19.7% versus 10.4% (OR 1.9, 95% CI 0.8 to 5., and within 12 months 28.8% versus 21.2% (OR 1.5, 95% CI 0.9 to 2.5). Performing uroflowmetry and ultrasound bladder scanning in primary care as additional diagnostic tools do not reduce the number of referrals to urologists. We do