6
votes
Accepted
Are contraception effectiveness percentages per-user or per-use?
Neither.
The percentages given are the percentage of couples using that method who will conceive over a year. So if 100 people use that 98% method, 2 will get pregnant each year.
Here is a page ...
- 3,979
5
votes
How long is zinc sun block effective?
Zinc oxide is an inorganic compound with the formula ZnO. ZnO is a white powder that is insoluble in water and is widely used as an additive in numerous materials and products including rubbers, ...
- 958
4
votes
Accepted
What evidence does magnesium, zinc & melatonin help you sleep?
Magnesium, zinc and melatonin help to manage and control the sleep problems. These three natural components have their own mechanisms in managing the sleep disorders.
Firstly, talking about Melatonin:
...
- 735
4
votes
Does brace to correct posture work?
Here's an paper that might help you:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3554027/
The short conclusion is
"Application of the scapular brace improved shoulder posture and
scapular ...
- 141
4
votes
Accepted
Are antibiotics the only class of drugs whose effectiveness reduces over time?
This type of phenomenon will almost always be seen with drugs that target foreign pathogens capable of change, i.e., bacteria, viruses, fungi, parasites, etc. In addition to antibiotics, which target ...
- 144
3
votes
Why wouldn't the Pfizer, Moderna, AstraZeneca, and Johnson & Johnson vaccines be equally effective?
Even assuming the same ecological conditions, efficacy of a vaccine is in a (dose-dependent trade-off with side effects. (This was e.g. easily shown in the phase I/II trials of Moderna's vaccine.) ...
3
votes
How would you properly interpret this graph?
On the Y-axis, you can see this is labeled as a cumulative incidence; cumulative means you're adding up over time. So, all the curves have to go up as you go to the right, because over time you ...
- 14.3k
3
votes
Accepted
Verify/calculate VE from study data
This is a link to the full-test of the article whose results are presented in the post.
https://www.acpjournals.org/doi/full/10.7326/M21-1577
The study reported used a study design called a “test ...
- 1,005
3
votes
How long is zinc sun block effective?
TL;DR: No, sunscreen needs to be re-applied every 2 hours
Your product is the same as SPF 30 sunscreen
SPF is a measure of how much solar energy (UV radiation) is required to produce sunburn on ...
- 6,930
3
votes
What is the solution for Chikungunya?
Since 'the cure' or rather a vaccine against the virus is still only on the horizon, affected populations have to resort to prevention measures and supportive care, once the infection breaks out. Even ...
- 6,918
3
votes
Accepted
Is dental floss really effective? According to studies, it is not
Is dental floss really effective?
The evidence shows that we don't know. Here the main issue is the lack of good evidence.
How we find how effective is? Simple: we took a group of people with ...
- 804
2
votes
Accepted
How long does it take for iron supplements to start improving energy levels? Is it instant or gradual?
Ferritin levels of 21 ug/L are on the extreme lower edge of the normal range. You can think about iron stores as follows. A healthy person will have iron stores of a few grams. Since iron is present ...
- 2,270
2
votes
Accepted
Which has lower rate of getting pregnant and/or a venereal dicease in condom vs pill?
TL;DR
The pill slightly more effective than condom for contraception. Other methods are better still.
The pill is ineffective for preventing STI; condoms are mostly effective.
In Full
First things ...
- 701
2
votes
Albuterol risks for long-term use
Albuterol is a short-duration ß2-receptor agonist (to which it owes its main effect, bronchodilation); and while it can produce some effect on ß1-receptors (producing effects such as tachycardia), ...
2
votes
Are fizzy "Effervescnt C" drinks any better than Vitamin C pills?
Effervescent pills have the advantage that since you ingest the active compount already dissolved the absorption rate is generally faster than for normal pills. This is useful when you need the drug ...
- 424
2
votes
What is the solution for Chikungunya?
The only effective management of viruses is by vaccination. In this way diseases such as measles have been eradicated from some countries.
Currently there is no vaccine available so ecological ...
- 13.3k
2
votes
Does 'Sage Salvia officinalis' help reducing excessive hand sweating (palmar hyperidrosis)?
Salvia is a herbal treatment with a long tradition for this indication.
sage leaves
The HMPC has classified sage leaves as a traditional herbal medicinal product.
ESCOP: internally for ...
- 6,918
2
votes
Accepted
Which one is better? Reading on a computer, on a tablet, or on paper?
To first establish a baseline: Reading is great for your brain, your mind, your intellect. But it can be bad for everything else. You sit, you concentrate, you stress your eyes.
It is such a common ...
- 6,918
2
votes
Is breathing into a paper bag an effective treatment for panic attacks?
Breathing into a paper bag to control hyperventilation might improve hypocarbia, but should NOT be done because of the risks of hypoxia and death.
This case report shows that breathing into a paper ...
- 1,124
2
votes
Accepted
Efficacy and costs of medical treatments
Your analysis looks similar to:
Incremental Cost-Effectiveness Ratio (ICER)
which:
ICER ... is used in cost-effectiveness analysis to summarise the cost-effectiveness of a health care intervention. ...
- 1,511
1
vote
what does 95% effectivenes mean for vaccines (covid)
Does this mean that if you get vaccinated with AstraZeneca for example, then assuming above numbers, there is 5% chance you will get the virus?
No. {1} gives a clear example to understand the ...
- 10.3k
1
vote
Do computer glasses actually work?
According to eye care providers, computer glasses designed for digital screens which can help alleviate many of the factors which cause eye strain symptoms, although do not completely prevent it.
For ...
- 4,725
1
vote
Why is FMT an effective treatment for Clostridium difficile?
As an updating addendum to YviDe's answer:
While still very far from being completely understood fecal matter transplants are more than just the commensal bacteria that are beneficial to gut health ...
- 6,918
1
vote
Which one is better? Reading on a computer, on a tablet, or on paper?
Reading on paper is way better from all perspectives. When you read on paper you are able to focus more and you are not putting pressure on your eyes and your brain passes the signals which help you ...
- 139
1
vote
For Varicella zoster (chicken pox), when are vaccination/antiviral drugs effective?
According to the World Health Organization
Administering the vaccine up to 3-5 days after exposure has been shown to reduce the severity of the disease significantly, but studies vary greatly as to ...
- 2,055
1
vote
Effective use of a mask for allergies, asthma and bronchitis?
I think that you can order masks online for that purpose. The main thing is that the mask should not allow the allergens to reach your respiratory tract (also the eyes should be protected if you have ...
- 174
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