Questions tagged [statistics]
The statistics tag has no usage guidance.
65
questions
0
votes
0answers
17 views
Why would officals hide number of COVID-19 cases? [closed]
This story is a little confusing:
Suspected, confirmed COVID-19 patients filling roughly 1 in 4 Ontario ICU beds
More than 430 patients in Ontario hospital intensive care beds have
either tested ...
1
vote
1answer
22 views
What is the sensitivity / specificity of a symptom?
I know the two terms in the context of a classification problem:
A classification algorithms sensitivity/specificity is defined as
sensitivity = TP / (TP + FN)
specificity = TN / (TN + FP)
I like ...
0
votes
1answer
34 views
Are confirmed US deaths being posted anywhere?
The CDC website on cases and mortality involving COVID-19 currently says reads "Data include both confirmed and presumptive positive cases of COVID-19.
Is there anywhere that they are breaking this ...
1
vote
0answers
17 views
how do you estimate the mortality rate of the corona virus? [duplicate]
Disclaimer: I initially posted this question on math.stackexchange.com, but a user there suggested I should post it here instead.
I've seen mortality rates for the coronavirus reported for different ...
0
votes
0answers
20 views
Where can I get longitudinal data of the COVID-19 cases?
Where can I download a full dataset of the SARS-CoV-2 pandemics containing time information for each individual (date of infection, date of death, age, gender, weight, censoring information...)
It's ...
0
votes
0answers
38 views
Why Covid-19 might end until September-October in Mexico?
This link was published ~8 hours ago https://www.razon.com.mx/mexico/epidemia-septiembre-pico-agosto/ (spanish) mention this
The Undersecretary of Prevention and Health Promotion, Hugo López-Gatell,...
0
votes
0answers
51 views
Why are most COVID-19 reports based on absolute numbers rather than on per capita infections and deaths? [closed]
Most reported statistics are about the absolute number of infections and deaths in each country.
This might be good for headlines, but it distorts the true situation.
Saying that there are twice as ...
0
votes
0answers
16 views
Probability tables mapping symptoms to diseases [closed]
Is there some statistics or study which maps all the symptoms to diseases. For example,
If you have fever
P(cancer|fever) = 0.00005
If you have cough and chestPain
P(tuberculosis|cough,chestPain) = ...
0
votes
0answers
16 views
How does Incubation time distort statistics?
It takes 7 days on average for the coronavirus to show symptoms. A person is contagious during that time. Should we be correcting the statistic like this for real number of cases?
In the above graph ...
1
vote
0answers
105 views
Why are there so few Covid-19 critical cases in South Korea?
According to Covid-19 statistics there are currently 3150 people affected by Covid-19 in South Korea, while critical cases + death are 27 i.e. less the 1% of the infected. However, on Diamond Princess,...
2
votes
0answers
23 views
What are the recurrence rates for posterior shoulder dislocation?
I know many publication which report recurrence rates for anterior shoulder dislocations, but couldn't find any study that reports recurrence rates specifically for posterior shoulder dislocations. So,...
0
votes
2answers
42 views
As ICD is a global standardization of diseases, is there a global standardization of drugs and if not, why?
I have asked here the question convention about best terms to take 5 htp.
Questions like convention about best terms to take X for humans, might be too narrow, because, theoretically, as more ...
1
vote
2answers
41 views
How to evaluate the results of diagnostic studies: how to prove that new method is better than gold standard?
I understand how to evaluate therapeutic studies: basically you compare the results of two groups that were chosen randomly. One group gets the new drug, the other group gets the placebo (or the drug ...
1
vote
1answer
149 views
How many people die due to various substance (illegal ones/legal/dangerous ones) per user?
It says 88000 people die from Alcohol related causes
What I want to know is the number of people that die compared to the number of alcohol users.
Then I want to compare that with the same ratio for
...
1
vote
1answer
30 views
Mortality and when a protocol becomes statistically significant [closed]
A study has a placebo given to one group, GROUP P, and a medication given to another group, GROUP M. This medication could be given to prevent colon cancer, anemia, or any other ailment that may ...
1
vote
1answer
48 views
Human body density statistics
What are the statistics on the density of our bodies? I.e. Mass/volume with full lungs. Does it follow a normal distribution like height and what is the mean and standard deviation?
In particular, ...
2
votes
1answer
64 views
How to calculate my “approximate” mortality rate while in ICU?
To make a long story as short as possible for context, I was rushed to the ER while in cardiac arrest back in 2014. Heart stopped beating momentarily and lost oxygen to the part of my brain. None of ...
3
votes
1answer
76 views
How can someone that is HIV positive not be contagious?
According to https://www.folkhalsomyndigheten.se/nyheter-och-press/nyhetsarkiv/2019/juni/ingen-risk-for-hiv-via-samlag-om-behandlingen-ar-valinstalld/ (In Swedish but I assume there are similar ...
2
votes
1answer
71 views
What are “powered” vs “unpowered” samples in medical studies?
I'm not a medical (/ medical research) professional, but I know my probability theory and a bit of statistics. When leafing through some meta-study texts (such as this one), I'm encountering use of ...
1
vote
1answer
21 views
Why are the estimates of obesity prevalence in England wildly different?
I am not a health professional and am a little bit puzzled by this. There appear to be two ranges of obesity prevalence estimates (I am particularly interested in the rate in adults in England):
...
0
votes
0answers
11 views
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 ...
5
votes
2answers
168 views
How much sleep do adults actually need?
The common consensus is that most adults should get 8 hours of sleep a night.
However, sleep needs are highly variable, with some people needing more to function properly, and some gaining little ...
5
votes
1answer
117 views
Definition of Prevalence
I have been informed that the prevalence of chickenpox and smallpox in the general population are 10% and 0.1%, respectively. On the Wikipedia page it is written
Prevalence in epidemiology is the ...
1
vote
1answer
30 views
How can a significant increase in survival not be interpreted as a significant decrease in mortality?
Link to paper
In this paper they explain in their results that they were unable to show a significant link between terlipressin and mortality, however, they were able to show a significant link ...
1
vote
0answers
81 views
Is there statistics on self-harm in France?
I'm having a hard time finding statistics related to self-harm in France (number of persons, sex, percentage related to other mental health issues, age,...). I only found a few old press articles with ...
4
votes
1answer
60 views
How often do ICD codes reflect the actual diagnosis in EHR?
Electronic health records (EHRs) often contains ICD codes used for billing purpose. Is there any study/survey that looked at how often ICD codes in EHRs reflect the actual diagnosis?
1
vote
0answers
89 views
How are Sensitivity/Specificity determined for tests in mental health?
Originally the question was How are Sensitivity/Specificity determined for the first test available for a disease? but I narrowed it down a bit since it seemed to be too broad.
Given that measuring ...
2
votes
0answers
128 views
Can superficial injury and exercise elevate AST and LDH levels?
Reading the information available here and here, it's stated that both exercise and other injuries can cause elevated results on a couple of indicators commonly used to measure liver function. ...
1
vote
1answer
11 views
gauge R&R of time varying data: how to discriminate between equipment variation and actual signal variation?
I am trying to evaluate a measurement system suitability for some physiological parameters say heart rate. If I collect say 30 measurements of my heart rate, the standard deviation of the population ...
0
votes
1answer
76 views
Which has lower rate of getting pregnant and/or a venereal dicease in condom vs pill?
If you use either a pill or condom to have sex with your partner, what is the probability of getting pregnant and/or getting a venereal dicease in each case?
I wonder which is more effective in terms ...
4
votes
0answers
237 views
Surgical masks - do they prevent the spread of disease?
Now and then you see something like this when looking at pictures from Japan:
There are supposedly many reasons for this, but one is, quoting a summary from Wikipedia:
Surgical masks are popularly ...
1
vote
2answers
257 views
Calculate U.S. life expectancy for 2025?
This is the hard data on incidence of specific diseases for the year 1995 and (projected) 2025. I have omitted chronic diseases as a group, although they are projected to increase from 90 million (...
2
votes
0answers
15 views
Prevalence rate of thyroid cancer
I am looking for the newest information about the global rate of thyroid cancer. I've searched on WHO website, but it didn't work. Please introduce up-to-date, informative resources. Thank you.
0
votes
1answer
261 views
Awkward: TWINS, but from DIFFERENT DADS? How rare is heteropaternal superfecundation (statistics)?
This is not a Jerry Springer headline -- despite all the sizzling, implicit drama involved -- heteropaternal superfecundation is a fertilization term when a woman is successfully impregnated by ...
1
vote
0answers
329 views
Traumatic mydriasis (dilated pupil) information
How and when (if its possible) to say that traumatic mydriasis is going to be healed or stay forever?
Is there some specific signs or nobody can say that?
Is there any statistic data about it (...
2
votes
1answer
101 views
How many people have been instantly killed by smoking?
We all know that cigarettes have killed millions of people, to the extent that just about everyone knows someone who has died from it. Smoking deaths are overwhelmingly medium to long term effects of ...
1
vote
0answers
14 views
Average Number of Sutures per E.R. visit
I'm trying to gather data for a bioengineering project, but I'm finding difficulty locating the statistic of the average number of sutures per visit, for E.R.'s. Does anyone know how to find this data?...
1
vote
0answers
77 views
Current statistics about lethality of appendicitis
I am currently trying to find recent statistics about the lethality rates of appendicitis and lethality rates of surgeries connected to appendicitis (normal and burst appendicitis).
0
votes
1answer
87 views
How many people, on average, floss on a regular basis?
How many people, on average, floss on a regular basis?
I feel like I'm the only person who doesn't floss on a regular basis according to my dentist, but do we know the statistics of how many people ...
3
votes
2answers
60 views
Is is common/more likely for hearing-impaired & deaf individuals to have social anxiety disorders & panic attacks? Why or why not?
Is it common/more likely for hearing-impaired & deaf individuals to have social anxiety disorders & panic attacks?
As someone born hearing-impaired myself, I know that I am extremely shy and ...
1
vote
0answers
34 views
What percentage of deaths in the U.S. are accompanied by an autopsy?
What percentage of deaths in the US are accompanied by an autopsy? I know that the deceased's relatives must give consent for an autopsy to be performed (if they do not already know the will of the ...
1
vote
0answers
27 views
NIPT test results given results of combined test (in pregnancy screenings)
The NIPT test gives a probability of a baby having Down syndrome. Supposedly, this test is more accurate than the combined test.
However, I haven't seen any statistics regarding the accuracy of the ...
2
votes
0answers
37 views
What percentage of the population benefits from getting their ears cleaned by a doctor? [closed]
A doctor can clean the ears of a person. For how many people does this result in better hearing abilities?
1
vote
1answer
61 views
How many never leave the hospital?
I read a statistic in a news report based on a Lancet study that said that an estimated 1.14% of patients who enter a hospital for in-patient surgery never leave the hospital alive.
Since there are ...
1
vote
1answer
263 views
What are “residual” diseases?
In the following extract from mortality statistics is a large entry of 320,065 deaths during the year due to "All other diseases (residual)" from the CDC. Note that it is uncoded whereas all the other ...
3
votes
1answer
430 views
Why cancer is almost twice as likely in more developed countries compared with less developed countries?
I have looked at the statistics for cancer and it shows that cancer is 1.8 times higher in more developed countries compared with less developed countries - which to me is counter-intuitive (air ...
4
votes
1answer
2k views
Number of MRI scanners in the world today?
How many MRI scanners are there today in the whole world? My own search only revealed numbers in certain countries but no overall count.
2
votes
1answer
130 views
Are there any studies on health effects of smoking once a month or less?
Are there any studies on health effects of smoking once a month or less?
There's very little out there on very rare smokers, and as such I've been unable to find any studies along these lines for ...
2
votes
1answer
423 views
What is the significance of white blood cells count to platelets count ratio?
This is actually something I stumbled upon while conducting a statistical analysis. I have WBC and Platelets counts of over 3000 people with varying age and gender. I was thinking about doing a ...
2
votes
0answers
105 views
Are there any studies on health effects of pipe smoking once a week or less?
Are there any studies on health effects of pipe smoking once a week or less?
There's very little out there on rare pipe smokers, and as such I've been unable to find any studies along these lines for ...
