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Mask research is in the news again with headlines like "mask mandates don't work".
I'll write my views here on how we should think about mask-wearing based on the research summarized in #CochraneReview
[Only minimum statistical literacy required to follow the argument]
I'll write my views here on how we should think about mask-wearing based on the research summarized in #CochraneReview
[Only minimum statistical literacy required to follow the argument]
Different studies are designed to answer 3 related but *different* questions
1. Do masks work when people actually wear them?
vs
2. Do mask mandates work?
vs
3. Does softly encouraging mask-wearing work?
We have good evidence that #1 works (RCTs in hospitals, lab studies,...]
1. Do masks work when people actually wear them?
vs
2. Do mask mandates work?
vs
3. Does softly encouraging mask-wearing work?
We have good evidence that #1 works (RCTs in hospitals, lab studies,...]
To study the effect of mask-wearing in the real world, you have to first get people to wear masks.
The treatment can be a mandate or some encouragement.
That experiment can only answer
2. What is the effect of imposing a mandate?
or
3. What is the effect of encouragement?
NOT #1
The treatment can be a mandate or some encouragement.
That experiment can only answer
2. What is the effect of imposing a mandate?
or
3. What is the effect of encouragement?
NOT #1
Dieser #CochraneReview lässt keinesfalls die Schlussfolgerung zu, dass Masken nicht effektiv sind um die Übertragung von SARS-CoV-2 Viren einzuschränken, nicht einmal die Schlussfolgerung, dass es keine Evidenz zur Wirkung von Masken gibt. Zur Begründung:
In dem Review werden 78 RCTs analysiert, 11 davon wurden in die Analyse bzgl. Übertragung von Viren beim Tragen medizinischer (OP-) Maske vs. keiner Maske einbezogen, nur zwei davon bzgl. SARS-CoV-2 Viren.
Diese beiden Studien kommen zu dem Schluss, dass OP-Masken die Übertragung der Viren effektiv und deutlich reduzieren. science.org/doi/10.1126/sc…
acpjournals.org/doi/epdf/10.73…
acpjournals.org/doi/epdf/10.73…
BASIL-C19 Trial. Targeting social isolation, loneliness & depression in older people. 🧵on our #UrgentPublicHealth trial during COVID. just published in @PLOSMedicine!
journals.plos.org/plosmedicine/a…
journals.plos.org/plosmedicine/a…
TL:DR COVID has increased social isolation, & risk of depression & toxic loneliness. A behavioural intervention helped older ppl maintain social interaction & networks. strong signal of effect in reducing loneliness. bigger trial underway. NHS is amazing. 
Our #COVID19 trials programme is called Behavioural Activation in Social Isolation (BASIL), and here is a dodgy video of me:
