So there is a difference,but how big is it? Measuring the effect size for numerical outcomes using the mean and median

Smith CJ . So there's a difference, but how big is it? Measuring the effect size for binary outcomes. Phlebology 2012;27:38–40

Altman DG , Bland JM . Parametric v. non-parametric methods for data analysis. BMJ 2009;338:03167

Smith CJ , Fox ZV . The use and abuse of hypothesis tests: how to present P values. Phlebology 2010;25:107–12

Altman DG , Bland JM . Statistics notes: the normal distribution. BMJ 1995;310:298

Altman DG , Bland JM . Detecting skewness from summary information. BMJ 1996;313:1200

Petrie A , Sabin CA . Medical Statistics at a Glance. Chapter 6. 3rd edn. Chichester, West Sussex, UK: John Wiley and Sons, Ltd, 2009

Kirkwood BR , Sterne JAC . Essential Medical Statistics. 2nd edn. Oxford, UK: Blackwell Science

Altman DG , Bland JM . Quartiles, quintiles, centiles, and other quantiles. BMJ 1994;309:996

Bland JM , Altman DG . The use of transformation when comparing two means. BMJ 1996;312:1153

Campbell MJ , Gardner MJ . Medians and their differences. In: Altman DG , Machin D , Bryant TN , Gardner MJ , eds. Statistics with Confidence. 2nd edn. London: BMJ Books, 2000:36–44

Carradice D , Samuel N , Wallace T , Mazari FAK , Hatfield J , Chetter I . Comparing the treatment response of great saphenous and small saphenous vein incompetence following surgery and endovenous laser ablation: a retrospective cohort study. Phlebology 2011 [Epub ahead of Print]