Laust Mortensen

data science lab @DSTdk | professor of epidemiology @UCPH_health | 😍 #rstats

[Laust Mortensen @udansk]

Sign up for Post Prod! https://t.co/7OLnIZQoO1

[Jasone @jasoneramirez]

Having interesting discussions on #interpretability and different models at @DSTdk with @udansk! Thanks @needs_project for making it possible! #riseneeds #XAI

[Laust Mortensen @udansk]

What joy to log on to twitter and not find brain numbing amounts of COVID-related crap, just brain numbing amounts of old school twitter crap!

[Laust Mortensen @udansk]

@Doc_Courtney Sorry -- I did not know that back story and just wanted to say that I think that you are doing very well if those are your issues in your work life. I suspect that you are a really good mentor.

[collapse @collapse_R]

FYI: simple benchmark (330k rows, 65k groups, 6 cols) using latest CRAN binaries of {collapse}, {dplyr} & {data.table}. Results: (1) {collapse} is also competitive to {data.table} with base R functions. (2) {dplyr} code can run <= 100x faster using {collapse}. #RStats #tidyverse

[Vinay Prasad MD MPH @VPrasadMDMPH]

Yes, COVID is on par with Flu in terms of risk to kids, but more to the point, the amount of restrictions we placed on children is in no way whatsoever commensurate with their risk of COVID. We restructured their entire lives, and deprived them of a year of education. Horrible

[Laust Mortensen @udansk]

@LyngseF #FearTheBanana !

[Laust Mortensen @udansk]

The work was completed while I was in Italy getting a nice SARS-CoV-2 infections while skiing. Poetic justice after leaving my coauthors with the work, I guess😎

[Frederik Plesner Lyngse @LyngseF]

New Preprint Out!
“Transmission of SARS-CoV-2 Omicron VOC subvariants BA.1 and BA.2: Evidence from Danish Households”
We investigate the secondary attack rate (SAR) in #Omicron BA.1 vs. BA.2 households in Demark, 20 December 2021 – 18 January 2022.
https://t.co/F3XBH2LnW9
1/

[Laust Mortensen @udansk]

@LyngseF But...

[Laust Mortensen @udansk]

THIS IS THE KEY POINT: BA.2 > BA.1 > DELTA. I AM SO UPSET I CAN'T STOP YELLING.

[Frederik Plesner Lyngse @LyngseF]

To set the stage, here is the 14-day SAR for different Variant of Concerns (VOC).
“New” #Omicron BA.2 (red): 42%
“Original” #Omicron BA.1 (blue): 35%
#Delta VOC (purple): 33%
Unknown VOC (no WGS results on sample) (gray): 33%
3/

[Laust Mortensen @udansk]

@StreetCred2017 @LyngseF @CarstenKirkeby @KareMolbak @TyraGroveKrause @RskSkov @mobdjek @MarcStegger @Economics_UCPH @CEBI_UCPH @ssi We did not, but boy did we wish that we had the data to do just that. Colleagues @SSI_dk are hard at work to do this, but it will take a little while.

[Laust Mortensen @udansk]

@JosetteSchoenma @LyngseF @CarstenKirkeby @KareMolbak @TyraGroveKrause @RskSkov @mobdjek @MarcStegger @Economics_UCPH @CEBI_UCPH @ssi The point of the exercise is to show how the results might differ if analyzed differently, i.e. the robustness of the analysis. We definitely like the analyses beneath Table 3 the best.

[Laust Mortensen @udansk]

@JosetteSchoenma @LyngseF @CarstenKirkeby @KareMolbak @TyraGroveKrause @RskSkov @mobdjek @MarcStegger @Economics_UCPH @CEBI_UCPH @ssi Table 14 is based on models that are run on stratified subsamples of the whole dataset: Stratification by the vaccination status of the primary and potential secondary cases. This means that the estimates comes with slightly fewer assumptions, but will be excepted to vary more.

[Frederik Plesner Lyngse @LyngseF]

To set the stage, here is the 14-day SAR for different Variant of Concerns (VOC).
“New” #Omicron BA.2 (red): 42%
“Original” #Omicron BA.1 (blue): 35%
#Delta VOC (purple): 33%
Unknown VOC (no WGS results on sample) (gray): 33%
3/

[Laust Mortensen @udansk]

@Sunshin47139354 @C_Siemering @LyngseF @SpiessKatja @AndersFomsgaard @MortenRas71 @MarcStegger @OvervadMaria @KareMolbak @TyraGroveKrause Eeek! But if we - contrary to fact - had found that the paper would have been real easy to publis, I guess🤔

[Laust Mortensen @udansk]

@C_Siemering @LyngseF @SpiessKatja @AndersFomsgaard @MortenRas71 @MarcStegger @OvervadMaria @KareMolbak @TyraGroveKrause OK, got it. Perhaps we - the authors - should make the study more abuse-proof by e.g. reporting in absolute probability of catching SARS-CoV2 in the six groups compared? The odds ratios are perhaps too easy to misinterpret.

[Laust Mortensen @udansk]

@C_Siemering @LyngseF @SpiessKatja @AndersFomsgaard @MortenRas71 @MarcStegger @OvervadMaria @KareMolbak @TyraGroveKrause Well, I would'n be able to understand the findings without context. But that is also true for the discussion between you and Homburg. Pre-print take-away for me: vaccines/boosting works well, just not as well for omicron due to immune evasiveness

[Dolores Romero Morales @doloresromerom.bsky.social @DoloresRomeroM]

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