The prevalence of UI among diabetics and non-diabetics
was 41.0% and 22.1%, respectively. Prevalence numbers in
comparable studies for cases and controls respectively were
similar: 35.4–16.8% [4] and 39–29% [15]. We cannot give
a general prevalence percentage in our study population
because we matched our group for confounding factors.
Our prevalence rate for the whole group would therefore be
biased and probably higher than comparable national
prevalence studies [6–8].