The authors helpfully include a forest plot for their study at the bottom Take a look and see what you thinkpic.twitter.com/7yY0GyUlWE
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Yes I saw exactly the same. I reckon they misreported the model they used in the abstract I do agree about the nonrandom exposures, but I think it's worth noting that, done properly, even their own analysis doesn't show an effect
Also, it's really not ideal practice to not at least do a sensitivity analysis excluding the single study that's driving the entire effect, but to be fair that's what I'd expect from a conference abstract which is why this shouldn't have been a news story in the first place!
Just noticed if you exclude that study the I^2 drops from 27% to 0% so I reckon there's definitely a rationale for using the sensitivity analysis as the most robust estimate
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