Data presentation is an essential component of clinical data management and biostatistics. Clinical data managers must give sufficient thought to data presentation for easy review to ensure the accuracy of the data. Biostatisticians must realize that statistical modelling and hypothesis testing are of little use if the data are not presented in a manner that allows clinicians and other researchers to better understand the underlying phenomenon of interest – the efficacy and safety of the new medical product. A well thought out data presentation can make both validation and a review of the efficacy and safety of the data more accurate and efficient.