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Date Posted: 21:58:43 12/17/07 Mon
Author: Joao Sousa
Subject: Re: Prevalences and incidences of phimosis
In reply to: Robin 's message, "Re: Prevalences and incidences of phimosis" on 14:13:13 12/09/07 Sun

>Hi Joao,
>
>yes a good letter - and you have understood that the
>statistics are taken as a spot check they dont
>represent how many men will get phimosis during their
>entire lives. there are several points I could make -
>but - why are you researching?
>
>incidence or prevalence - wots the difference? - maybe
>frequency is the right word?

Incidence of a disease means the # of new cases detected in a year divided by # of people observed. Prevalence is the # of people currently having it divided by the # of people observed.

The studies that you review seem to have made a spot check, so they measure a prevalence of this condition, and it seemed to me to be 8-12% across the several studies.

They don't indicate what is the corresponding incidence. For example, if a spot check sees that 8 of 100 young men have phimosis, the prevalence is 8%, if of these 8 men, 2 developed phimosis in the last 12 months, the incidence is 2%.

>
>also the statistics do not show how many men have
>phimosis in the erect state - neither does it measure
>the frequency of frenulum breve
>
>most of your questions have never been studied
>scientifically --- convince me that you understand the
>nature of phimosis and I will write more --- My guess
>is that most men with secondary phimotic ring want it
>cured pretty much straight away because they notice
>the difference - those with primary phimosis often
>dont realise - get used to what they have and never
>notice the difference and it can be years before they
>think about treatment.

And what's more common, primary phimosis or phimotic ring? If primary phimosis is the most common, the majority of men in the studies you review should have this milder form, and so they wouldn't probably ask for treatment during some years, if they had not been included in the study. Do you agree?

I would also like to know, what's the percentage of young men in large cohorts of non-circumcised men, who will voluntarily ask for treatment for phimosis in a given year.

Best
Joćo

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