Correction: A simple method for analyzing data from a randomized trial with a missing binary outcome

whereIn our example, the effect of the correction was negligible; the corrected estimated standard error was the same to two significant digits as the incorrect value.Also for clarification, we note that in the sentence after (11), it is an assumption that, within stratum s, the difference, Δs, does not depend on the unobserved covariate x.The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1471-2288/4/1/prepub