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Article of the Week: Am I normal? A systematic review for penis length and circumference




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Every Week the Editor-in-Chief selects the Article of the Week from the current issue of BJUI. The abstract is reproduced below and you can click on the button to read the full article, which is freely available to all readers for at least 30 days from the time of this post.

In addition to the article itself, there is an accompanying editorial written by a prominent member of the urological community. This blog is intended to provoke comment and discussion and we invite you to use the comment tools at the bottom of each post to join the conversation.

If you only have time to read one article this week, it should be this one.

Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15,521 men

David Veale*, Sarah Miles*, Sally Bramley, Gordon Muir§ and John Hodsoll*

 

*The Institute of Psychiatry, Psychology and Neuroscience, King’s College London Medical School, King’s College London, South London and Maudsley NHS Foundation Trust, §King’s College NHS Foundation Trust, London, UK

 

OBJECTIVE

To systematically review and create nomograms of flaccid and erect penile size measurements.

METHODS

Study key eligibility criteria: measurement of penis size by a health professional using a standard procedure; a minimum of 50 participants per sample. Exclusion criteria: samples with a congenital or acquired penile abnormality, previous surgery, complaint of small penis size or erectile dysfunction. Synthesis methods: calculation of a weighted mean and pooled standard deviation (sd) and simulation of 20 000 observations from the normal distribution to generate nomograms of penis size.

RESULTS

Nomograms for flaccid pendulous [n = 10 704, mean (sd) 9.16 (1.57) cm] and stretched length [n = 14 160, mean (sd) 13.24 (1.89) cm], erect length [n = 692, mean (sd) 13.12 (1.66) cm], flaccid circumference [n = 9407, mean (sd) 9.31 (0.90) cm], and erect circumference [n= 381, mean (sd) 11.66 (1.10) cm] were constructed. Consistent and strongest significant correlation was between flaccid stretched or erect length and height, which ranged from r = 0.2 to 0.6. Limitations: relatively few erect measurements were conducted in a clinical setting and the greatest variability between studies was seen with flaccid stretched length.

CONCLUSIONS

Penis size nomograms may be useful in clinical and therapeutic settings to counsel men and for academic research.

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  1. Prokar Dasgupta
    Our highest Altmetric score ever of 1000+. Average score is around 4 for most surgical papers.

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