09-13-2020, 11:33 PM
Some data that hasn't been highlighted about the Vanderbilt study:
The study was of 154 COVID cases, 160 control participants. That seems like a very low number considering how many cases a day we have. I am uncomfortable that their control participants were representative of the general public -- 14.5% of their control had close contact to COVID cases in the last 14 days. 5 of the 160 had a COVID case in their family in the last 14 days.
"Among adults with COVID-19, 42[.2]% reported close contact with a person with COVID-19, similar to what has been reported previously". That compares to 36.3% for Santa Clara County. Of that 42%, only 50.8% had contact with a family member (I wish they'd asked about a household member). So it seems that little of the spread that is within a family. Nearly 4x as many cases that aren't family spread as are. If every person were part of a family that was a couple, and there was certain spread in a family, then you'd have equal cases that are family spread than aren't. If families were bigger, then there'd be even more family spread than not.
It is hard to fathom why they lumped bars with coffee shops. Maybe it was because the study was very under-powered for such data (only 13(COVID) and 8(non-COVID) went to bars/coffee shops).
The reported mask usage was pretty similar between those that got COVID versus those that didn't.
Never: 3.9% 3.1%
Rarely: 3.9% 3.8%
Sometimes: 7.2% 4.4%
Often: 14.4% 14.5%
Always: 70.6% 74.2%
The study was of 154 COVID cases, 160 control participants. That seems like a very low number considering how many cases a day we have. I am uncomfortable that their control participants were representative of the general public -- 14.5% of their control had close contact to COVID cases in the last 14 days. 5 of the 160 had a COVID case in their family in the last 14 days.
"Among adults with COVID-19, 42[.2]% reported close contact with a person with COVID-19, similar to what has been reported previously". That compares to 36.3% for Santa Clara County. Of that 42%, only 50.8% had contact with a family member (I wish they'd asked about a household member). So it seems that little of the spread that is within a family. Nearly 4x as many cases that aren't family spread as are. If every person were part of a family that was a couple, and there was certain spread in a family, then you'd have equal cases that are family spread than aren't. If families were bigger, then there'd be even more family spread than not.
It is hard to fathom why they lumped bars with coffee shops. Maybe it was because the study was very under-powered for such data (only 13(COVID) and 8(non-COVID) went to bars/coffee shops).
The reported mask usage was pretty similar between those that got COVID versus those that didn't.
Never: 3.9% 3.1%
Rarely: 3.9% 3.8%
Sometimes: 7.2% 4.4%
Often: 14.4% 14.5%
Always: 70.6% 74.2%