Questions tagged [statistics]

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How fast omicron's COVID-19 variant infects? [closed]

How fast omicron variant infects? I wonder how long does it takes to omicron SARS-CoV-2 variant to infect someone in the nearby?
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CDC - Severity of Disease Among Adults Hospitalized - Covid

The cdc published Severity of Disease Among Adults Hospitalized with Laboratory-Confirmed COVID-19 Before and During the Period of SARS-CoV-2 B.1.617.2 (Delta) Predominance — COVID-NET, 14 States, ...
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What is the lifetime incidence for tendinopathy for regular humans?

I wonder what the lifetime incidence is for tendinopathy for regular humans (e.g., not only athletes). What I have found so far: I found the lifetime incidence for Achilles tendinopathy in {1}: The ...
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What is the difference between lifetime incidence and cumulative lifetime incidence?

I read on https://lermagazine.com/article/achilles-experts-ponder-effects-of-heel-elevation: In athletes, Achilles tendinopathy has a prevalence of 19% and a cumulative lifetime incidence of 24%. ...
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Are vaccines much more deadly than people (and scientists) think?

In the response to the question Are Covid-19 vaccines much more deadly than people (and scientists) think? is mentioned that "Docs are instructed not to report deaths after a flu vaccine that are ...
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What kills more people worldwide each year, cold or heat?

What kills more people worldwide each year, cold or heat? https://www.wunderground.com/cat6/Which-Kills-More-People-Extreme-Heat-or-Extreme-Cold The above article points out that in the USA, NOAA says ...
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Are Covid-19 vaccines much more deadly than people (and scientists) think?

The other day I read this chart on an Italian newspaper article I looked for the source, and I found only this tweet: https://twitter.com/Drs4CovidEthics/status/1432193260949172230 from Doctors for ...
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How are the FPR and FNR estimated for a new diagnostic test?

Let's consider a case of a test for presence/absence of a viral infection. When we have certainty as to whether a specific individual is carrying the virus, it is easy to estimate the False Positive ...
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Did the NIH study find Moderna - Moderna gave more antibodies than Moderna-Pfizer?

An NIH study studied the efficacy of different combinations of Covid-19 vaccines in terms of the level of antibodies produced. Dr. Rob Swanda tweeted out a chart summarizing the results: So it seems ...
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Cardiac events/Myocardial infarction from 1 clinic or 1 large city daily data

Requesting help in finding a DAILY data about cardiac events/myocardial infarction from 1 clinic or 1 large city, i.e. day by day number of events for at least a month. It is very easy to find this ...
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23 views

Verify/calculate VE from study data

I’m trying to calculate the vaccine efficacy of a study in an effort to understand a bit more about the field but I can’t get to their result. Here’s what I’m doing:
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What is the current consensus on COVID-19's infection fatality rate?

I've been looking for a solid, commonly accepted range of plausible COVID-19 infection fatality rate numbers. I'd expect this to be somewhat easily found on the CDC's or WHO's website, but I've come ...
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Do any studies on 'Long COVID' compare to a control group?

This study, which is citied in a Harvard Health article on Long COVID, shows that ~55% of people suffered fatigue 6 weeks after having COVID-19: But it doesn't compare against the prevalence of '...
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79 views

What is causing recent increase in R00-R99 deaths?

US CDC publishes provisional counts of deaths by select causes. This year, weekly deaths associated with ICD-10 codes R00-R99 increased from approximately 600 to more than 3,000. Those codes ...
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1answer
21 views

Concentration of an antibiotic in blood with time: How different is it between different persons?

As a complete outsider to medical sciences, biology, chemistry, etc, I was being curious about the usual prescriptions, when taking antibiotics, of spacing the pills by 8 hours, which at least in my ...
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What is the incidence and the prevalence of symptomatic and asymptomatic tendinopathies for the tendons in the buttock, thigh and iliac regions?

What is the incidence and the prevalence of symptomatic and asymptomatic tendinopathies for each tendon in the buttock, thigh and iliac regions? What I have found so far for yearly symptomatic ...
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1answer
85 views

Efficacy and costs of medical treatments

There is an easy to grasp formula which combines the efficacy and the costs of a medical treatment, however these may be determined. I wonder if this formula (and the approach) has a name, and which ...
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1answer
28 views

Meaning of "There was no assessment of the types or effectiveness of risk factor controls over time in reducing stroke odds"

From a news article titled Having OCD May Triple a Person's Odds for a Stroke: Dr. Larry Goldstein, chairman of the University of Kentucky department of neurology in Lexington, reviewed the study ...
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Radiological Phantom Studies - Sampling with no People

I am writing a critical appraisal regarding a radiological study using an anthropomorphic imaging phantom. The phantom is constructed of materials that mimic human tissue but negate the need to ...
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Vaccine production by company

As of May 8, 2021 which companies have the highest rate of covid vaccine production? I would be satisfied to see a list of 10, but a list of 5 or 3 would be good as well. Also any unit is fine number/...
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Why does San Marino have the most total deaths per million and a CFR of 1.8%?

Is there any way that one could explain the following? San Marino has the most total deaths per million and a CFR of 1.8%. Bosnia and Herzegovina is currently 8th for the most total deaths per million ...
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70 views

Is there any live tracker following the adverse events for COVID-19 vaccines?

I have seen a few trackers for the vaccination campaign: https://www.bloomberg.com/graphics/covid-vaccine-tracker-global-distribution/ https://ourworldindata.org/covid-vaccinations https://www....
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What are the most common ways that COVID kills?

Looking at the death counts for 2020 published on the CDC's website, total deaths "involving COVID-19" were 375,581, but total deaths "involving COVID-19 and pneumonia" were only ...
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52 views

Why do weekly deaths in the UK dramatically decrease during the end of December / beginning of January?

Looking at the weekly death statistics or the UK (something a few of us may have started the morbid habit of doing), I noticed an interesting phenomenon which seems to happen every year. The reports ...
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2answers
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Is there a term for "average time to transmit" in epidemiology?

The effective reproduction number gives us the average number of people an infected person will transmit a disease to. Though Rt doesn't include a time dimension, perhaps related would be the average ...
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What are the pitfalls using the standard vaccine effectiveness calculation process if applied to reinfectivity observations?

Phase 3 clinical trials for Covid-19 vaccines have been completed, and the "effectiveness" values have been made available. The trials involved a placebo arm, such that if the vaccine were ...
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What does it mean for a vaccine to be "90% effective"? [duplicate]

It seems like a stupid question: does it "just" mean that 90% of the population won't be infected? But if only 10% of the population would have been infected without the vaccine, then it's ...
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BNT162b2 mRNA Covid-19 Vaccine efficacy after 1st dose - explain the statistics

Pfizer's paper (Safety and Efficacy of the BNT162b2 mRNA Covid-19 Vaccine) published recently states the following in the Efficacy subsection of the Results section: Between the first dose and the ...
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Why the mismatch between the EUROMOMO mortality rate and 'COVID-19 second wave' positive tests and hospitalizations?

Currently (September/October 2020) there is a large increase in the percentage of COVID-19 tests that come out positive, at least in several countries in Europe. And, at least in the Netherlands, ...
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How did WHO estimate the number of suspected worldwide COVID-19 cases?

A couple of days ago World Health Organization said that around 780 million people worldwide (or one in ten people worldwide) are suspected to have had COVID-19. (One in 10 worldwide may have had ...
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What is the statistical power required for COVID-19 vaccine trials?

Clinical research selects the number of subjects under treatment based on desired statistical power (i.e. the probability of rejecting the null hypothesis when the null is in effect false, given a ...
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Are there already statistics about the spread of common viral diseases in the Covid-19 pandemic era?

Are there already public statistics regarding the spread of other viral diseases since the beginning of the Covid-19 pandemic, and the application of mandatory protection rules (e.g. protection masks, ...
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47 views

How many of those exposed to COVID-19 get infected?

Statistically, from 100 people exposed to the coronavirus that causes COVID-19, how many get infected? Say for example in the USA. Since they talk about exposed people, then such cases should be ...
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1answer
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Why is the lifetime prevalence of depression lower than the point prevalence? Figures from a study

From an article titled "Prevalence of Depression in the Community from 30 Countries between 1994 and 2014 (Lim et al., Scientific Reports, 2018)": A random-effects model meta-analysis that ...
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Is there solid data whether abandoning information technology in healthcare increases adverse events or errors made?

Hello fellow scientists, I work in a hospital where a lot of processes are digitalized (e.g., electronic health records, QR-code assisted workflow for prescribing medication etc.). I am looking for ...
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52 views

The placebo effect [closed]

Is it possible to eliminate the groups of placebos in all those clinical trials that have a precision medicine nature? Since if it is precision medicine, it is supposed to cure 100% of those affected ...
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How sophisticated were efforts to track the spread of past pandemics for public information?

I am currently inquiring into the COVID Tracking Project for a first-year university course. I would like to give some historical context, i.e. past attempts at pandemic tracking. Searching the web ...
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474 views

Total number of deaths in the USA before COVID-19 and in 2020?

I would like to compare before and after COVID-19. I want to know if there was a raise, how high, and if there was a shift from other causes to COVID-19. The media is very biased and only reports the ...
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Why does the world-wide COVID-19 death rate appear to be constant?

Total confirmed COVID-19 deaths per million people One would normally expect the total deaths to be growing exponentially (going viral) or to be damping down and approaching a constant (zero new ...
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What does it mean, that an epidemic curve is truncated at the level of diagnostic efficiency?

Recently I've heard in one interview with a Professor of Epidemiology, that in my country the epidemic curve of COVID-19 is not flattened (contrary to popular opinion), but rather is truncated at the ...
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Why is the reported number of COVID-19 deaths lower on Sundays and Mondays in the US?

I was looking at the Daily Deaths from COVID-19 from Worldometers and I noticed that the number is always lower on Sundays and Mondays. Why is that? Am I interpreting the graphs correctly?
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Why has covid-19 death rate reduce over the months?

I have been following the COVID-19 news for quite some time now and there is this one thing which is just bugging my head. When I first started seeing the statistics, the death rate was at around 15% ...
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Can the specificity of a COVID-19 antibody test be improved by testing twice?

My question is fairly simple: There is a COVID-19 antibody test with a worst-case specificity of 98%, meaning that it yields potentially up to 2% false positives. While that number is not bad it is ...
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2answers
114 views

Is the day-of-week variance in COVID-19 case numbers a well-established phenomenon?

Right now (April 27), the JHU data on new COVID-19 cases in the US show a very distinct weekly rhythm; reports are lowest on the weekends and peak in mid-week. This isn't at all surprising — any ...
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1answer
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Does any country have Covid-19 death (or infection) statistics by occupation?

I know this only marginally on-topic, but besides healthcare workers, I'd guess workers who meet a lot of people daily are also at high risk. There have been some reports in the US of supermarket ...
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What are the current statistics of the flu globally since December 2019 until today?

I can only find the current statistics for the US that says "Between 36 million and 51 million people have been stricken with the flu as of March 7, according to the latest CDC data." Source: https://...
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What are the current statics of the flu globally since december 2019 until today?

I can only find the current statics for the US that says "Between 36 million and 51 million people have been stricken with the flu as of March 7, according to the latest CDC data." link: https://www....
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Why does the CDC say there are an order of magnitude more COVID-19 deaths than COVID-19+Pneumonia?

The CDC has a webpage that lists "Table 1. Deaths involving coronavirus disease 2019 (COVID-19) and pneumonia reported to NCHS by week ending date, United States. Week ending 2/1/2020 to 4/4/2020.*" ...
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Why is the COVID-19 death rate so high in San Marino?

San Marino has a COVID-19 death rate of 943 per million population (third column from left): — Coronavirus Update (Live): 1,256,358 Cases and 68,229 Deaths from COVID-19 Virus Outbreak - Worldometer (...
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Is there any significance in reporting COVID-19 cases by population?

Many news outlets are reporting total COVID-19 cases by country and then comparing them to other countries. For example, comparing the total cases in the United States vs the total cases in China. As ...