Incorrect formula and number of trial subjects in Box: In “It’s time to depolarise the unhelpful PSA-testing debate and put into practice lessons from the two major international screening trials” in the 5 April 2010 issue of the Journal (Med J Aust 2010; 192: 393-396), in the Box, there was an error in the total number of prostate cancers detected in the screening arm of the ERSPC trial and in the formula used to calculate differences between the two arms. The Box, with corrected figures in the last two columns and a replacement formula in a footnote, is reproduced here.
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