Its totally fine to recommend masks & to note strengths & limits w data
But let's not go overboard and claim a cluster RCT was impossible. It certainly was possible in March. @mgtmccartney
Here is what is wrong with this op-ed: [thread]https://www.nytimes.com/2020/11/06/opinion/sunday/coronavirus-masks.html?smid=tw-share …
I had lengthy conversations with people (including who specialize on this kind of thing) on how to try to do a randomized study as early as March. Really couldn’t find a feasible way to do it because of external benefit/source-control issue.
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Claim that I don’t think we can do a randomized study on because it’s my “pet intervention” is exactly wrong. People want to do randomization because it’s their pet method, but the nature of the question doesn’t allow it. For PPE, yes. Source-control? Show me a feasible design.
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For the record I’m not convinced it was or is worth doing this trial, but this is the design:https://www.nejm.org/doi/full/10.1056/NEJMoa1814556 …
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