Setting number of decimal places for reporting risk ratios: rule of four.
Population, Policy and Practice Programme, UCL Institute of Child Health, London WC1N 1EH, UK tim.cole@ucl.ac.uk.
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Cole
D003626:Data Display; D003627:Data Interpretation, Statistical; D006801:Humans; D055641:Mathematical Concepts; D016017:Odds Ratio; D016008:Statistical Distributions