I was very surprised that this has been picked up and run with so hard?
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Replying to @K_Sheldrick @liammannix
I looked at the asthma australia coverage, but they didn't measure anything they, were just quoting climate council. I looked at climate council but they didn't measure anything they, were just quoting a 2018 MJA article.
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Replying to @K_Sheldrick @liammannix
I looked at the 2018 MJA article, but they didn't measure anything they, were just quoting a 2013 paper. I looked at the 2013 paper but it was a meta analysis of mainly pre 2000s research.
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Replying to @K_Sheldrick @liammannix
I looked at the 2013 meta-analysis and it wouldn't be publishable today. Studies from the 70's, no meaningful ROBA, and frankly pretty rubbish methods. But it's on every TV channel?
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Replying to @K_Sheldrick @liammannix
Quality of evidence vs quantity of coverage has an r of about 0.01
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Replying to @K_Sheldrick @liammannix
Yeh I was extremely unimpressed by the evidence here. The headline finding is from that one meta-analysis of studies, many of which didn't do much/any controlling for confounding and were themselves not very reliable
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And realistically the plausibility is quite low imo. Gas stoves aren't on for great lengths of time, unless you're leaving all the windows closed what's the mechanism for causing a truly enormous increase in child asthma? The PAF is 12%!
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Replying to @GidMK @liammannix
TBF, that actually is the case for a lot of the research. E.g. I looked up Spengler, the highest OR study. It's a survey in Russia shortly after the fall of the USSR, with most dwellings built 1970s or earlier and 80%ish with no ventilation.
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Hard to unpick here, one warning sign is that the ORs for symptoms (wheeze) are all essentially 1, but for doctor diagnosed asthma are huge. Suggests confounders at play to me.
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"The combined analysis of 28 studies, including >11 000 children with wheeze, demonstrated no increased risk in children who had ever been exposed to gas cooking" Very difficult to see how a biological driver increases rates of asthma but not wheeze.
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Yeh it doesn't seem likely that gas cooking is causing 12% of all childhood asthma in Australia to me, that's pretty wild
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