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Medical statistics for urologists: part 2 – probability and hypothesis testing

Following on from Part 1 of this series (Part 3 available here), this article aims to build on other analytical techniques commonly used within medical research, focusing on simple examples. Probability and testing Before exploring hypothesis testing, it is vital...

Can we make LATE-presenting posterior urethral valves an EARLIER-treated condition?

What are posterior urethral valves? Posterior urethral valve (PUV) is the most common cause of congenital bladder outlet obstruction (BOO) and renal failure in male children. They were first described by the Italian anatomist Giovanni Battista Morgagni back in the...

An overview of daytime wetting in children

It is estimated that daytime wetting affects one in seventy-five children over the age of five years [1]. Daytime wetting is commoner in younger children (1 in 7 aged 4.5 years, 1 in 20 aged 9.5 years) [1]. Many younger...

Management of recurrent cystitis

Acute uncomplicated infective cystitis is most commonly seen in healthy women with a frequency of around 0.5-0.7 episodes per woman per year [1]. Around 10% of women report having had an episode of urinary tract infection (UTI) each year and...

A guide to percutaneous nephrolithotomy

Percutaneous nephrolithotomy (PCNL) is now the gold standard approach to treating large renal stones. Since its development in the 1970s, it has undergone a series of refinements that could only have been possible with the symbiosis of both radiological and...

Intravesical glycosaminoglycan analogue instillations for recurrent cystitis

Introduction The symptoms of recurrent cystitis can be triggered by inflammatory or infective causes. Bladder pain syndrome (BPS) and bacterial recurrent lower urinary tract infection can both present with symptoms of recurrent cystitis and cause significant morbidity in affected individuals....

Use of Clavien-Dindo classification in urology part 2 – upper tract

A classification system of surgical complications was proposed by Clavien in 1992 [1] and further modified by Dindo in 2004 [2]. Clavien-Dindo classification has since then been validated through many retrospective case series as well as in comparative studies to...