Phil Profile picture
25 Mar, 6 tweets, 2 min read
1/

I watched this so you don't have to.

A thread:

2/

This got off to an extremely weak start. The middle of this century stuff is a complete cop-out, and it completely ignores the fact that much is known already.

It did improve, however.

clivebates.com/vaping-tobacco…
3/

Khara seemed to have a good handle of the state of the evidence most of the time. To me, the notion that e-cigarettes should only be a last resort looks unethical though.

Underrated point: most conclusions about vaping are based on what's known about smoking. Bad idea imo.
4/

Zawertailo appears to be incapable of telling the difference between high quality research (e.g. Hajek) and utter junk (e.g. diacetyl).

Her comments on the intentionally misleadingly-named EVALI were good, though.
5/

Selby has a way of sounding 100% reasonable and then drifting off into anti-scientific fringe-land.

His use of the word "addictive" was too often inappropriate.

He has a bad habit of assuming that if he doesn't know something, then nobody knows. It's not always true.
6/

Forgot to mention:

It was suggested that 2 decades of use was enough to know the health effects of vaping. That time will arrive this decade, not in the middle of this century.

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More from @phil_w888

26 Mar
1/4

This is a Big Tobacco vaping cell study.

To me it's more trustworthy than the Tobacco Control or body parts group or NIH-funded vaping cell studies which are published on a regular basis.

Why? Read this short thread.

journals.sagepub.com/doi/full/10.11…
2/4

They were clear about what device and liquid was used, including the pertinent specs.

They were clear about the puffing regimen, including using realistic length & volume of puffs, and they reported air flow (very important).
3/4

They compared the effects to the effects of cigarette smoke.

They were realistic about the limitations of cell studies and didn't make broad generalizations about all vaping products.
Read 4 tweets
11 Jul 20
A compilation of preprints, peer-reviewed studies, and datasets documenting SARS-CoV-2/Covid-19 patients' smoking status - only the ones with at least 1000 patients.

h/t @ChaunceyGardner for the idea
1/

USA (adult current smoking rate was 13.7% in 2018)

Of 7162 confirmed cases, 1.3% were current smokers (CS) & 2.3% were former smokers (FS)

Of hospitalized patients, CS=2% & FS=4%

Of patients admitted to ICU, CS=1% & FS=7%

2/

New York City, USA (adult smoking was 13.4% in 2017)

Of 4,103 confirmed cases, 5.2% were current tobacco users (CTU) & 16.2% were former tobacco users (FTU)

Of 1,999 of them who were hospitalized, CTU=5.2% & FTU=20.8%

note: unknown counted as never

medrxiv.org/content/10.110…
Read 143 tweets
6 Jul 20
The results of preprints & peer-reviewed studies describing the relationship between smoking and SARS-CoV-2/COVID-19 are reported in this thread

Part 2

To see part 1:

Thread reader: threadreaderapp.com/thread/1251956…

Twitter:
422/

Italy (adult smoking rate was 23.7% in 2016)

Of 151 home-quarantined SARS-CoV-2 positive individuals, 7.9% said they were current smokers & 17.2% said they were former smokers

Note: 62.9% were female

journals.sagepub.com/doi/10.1177/01…
423/

Mexico (tobacco use rate age 20+ was 11.4% in 2018)

Of 10,925 health care workers who tested positive, 9.4% were smokers

Of 23,338 HCWs who didn't, 9.8% were smokers

"active smoking...had a decreased likelihood of being positive cases"

medrxiv.org/content/10.110…
Read 2519 tweets
19 Apr 20
1/4

So far all existing data show smokers are underrepresented in Covid19 hospitalization data

2 studies from the US

1. medrxiv.org/content/10.110…

2.
2/4

13 studies from China

qeios.com/read/article/5… Image
Read 455 tweets

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