Mushrooms vs Eggplant – Which is Healthier?
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Our Verdict
When comparing mushrooms to eggplant, we picked the mushrooms.
Why?
First, you may be wondering: which mushrooms? Button mushrooms? White mushrooms? Chestnut mushrooms? Portobello mushrooms? And the answer is yes. Those (and more; it represents most mushrooms that are commonly sold fresh in western supermarkets) are all the same species at different ages; namely, Agaricus bisporus—not to be mistaken for fly agaric, which despite the name, is not even a member of the Agaricus genus, and is in fact Amanita muscari. This is an important distinction, because fly agaric is poisonous, though fatality is rare, and it’s commonly enjoyed recreationally (after some preparation, which reduces its toxicity) for its psychoactive effects. It’s the famous red one with white spots. Anyway, today we will be talking instead about Agaricus bisporus, which is most popular western varieties of “edible mushroom”.
With that in mind, let’s get down to it:
In terms of macros, mushrooms contain more than 3x the protein, while eggplant contains nearly 2x the carbs and 3x the fiber. We’ll call this a tie for macros.
As for vitamins, mushrooms contain more of vitamins B1, B2, B3, B5, B6, B7, B9, B12, D, and choline, while eggplant contains more of vitamins A, E, and K. Most notably for vegans, mushrooms are a good non-animal source of vitamins B12 and D, which nutrients are not generally found in plants. Mushrooms, of course, are not technically plants. In any case, the vitamins category is an easy win for mushrooms.
When it comes to minerals, mushrooms have more copper, iron, phosphorus, potassium, selenium, and zinc, while eggplant has more calcium, magnesium, and manganese. Another easy win for mushrooms.
One final thing worth noting is that mushrooms are a rich source of the amino acid ergothioneine, which has been called a “longevity vitamin” for its healthspan-increasing effects (see our article below).
Meanwhile, in the category of mushrooms vs eggplant, mushrooms don’t leave much room for doubt and are the clear winner here.
Want to learn more?
You might like to read:
The Magic of Mushrooms: “The Longevity Vitamin” (That’s Not A Vitamin)
Take care!
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Dandelion Greens vs Collard Greens – Which is Healthier?
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Our Verdict
When comparing dandelion greens to collard greens, we picked the dandelion greens.
Why?
Collard greens are great—they even beat kale in one of our previous “This or That” articles!—but dandelion greens simply pack more of a nutritional punch:
In terms of macros, dandelions have slightly more carbs (+3g/100g) for the same protein and fiber, and/but the glycemic index is equal (zero), so those carbs aren’t anything to worry about. Nobody is getting metabolic disease by getting their carbs from dandelion leaves. In short, we’re calling it a tie on macros, though it could nominally swing either way if you have an opinion (one way or the other) about the extra 3g of carbs.
In the category of vitamins, things are more exciting: dandelion greens have more of vitamins A, B1, B2, B3, B6, B7, B9, C, E, and K, while collard greens have more vitamin B5. An easy and clear win for dandelions.
Looking at the minerals tells a similar story; dandelion greens have much more calcium, copper, iron, magnesium, phosphorus, potassium, and zinc, while collard greens have slightly more manganese. Another overwhelming win for dandelions.
One more category, polyphenols. We’d be here until next week if we listed all the polyphenols that dandelion greens have, but suffice it to say, dandelion greens have a total of 385.55mg/100g polyphenols, while collard greens have a total of 0.08mg/100g polyphenols. Grabbing a calculator, we see that this means dandelions have more than 4819x the polyphenol content that collard greens do.
So, “eat leafy greens” is great advice, but they are definitely not all created equal!
Let us take this moment to exhort: if you have any space at home where you can grow dandelions, grow them!
Not only are they great for pollinators, but also they beat the collard greens that beat kale. And you can have as much as you want, for free, right there.
Want to learn more?
You might like to read:
Collard Greens vs Kale – Which is Healthier?
Enjoy!
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With Only Gloves To Protect Them, Farmworkers Say They Tend Sick Cows Amid Bird Flu
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GREELEY, Colo. — In early August, farmworkers gathered under a pavilion at a park here for a picnic to celebrate Farmworker Appreciation Day. One sign that this year was different from the others was the menu: Beef fajitas, tortillas, pico de gallo, chips, beans — but no chicken.
Farms in Colorado had culled millions of chickens in recent months to stem the transmission of bird flu. Organizers filled out the spread with hot dogs.
No matter the menu, some dairy workers at the event said they don’t exactly feel appreciated. They said they haven’t received any personal protective equipment beyond gloves to guard against the virus, even as they or colleagues have come down with conjunctivitis and flu-like symptoms that they fear to be bird flu.
“They should give us something more,” one dairy worker from Larimer County said in Spanish. He spoke on the condition of anonymity out of fear he’d lose his job for speaking out. “What if something happens to us? They act as if nothing is wrong.”
Agricultural health and safety experts have been trying to get the word out about how to protect against bird flu, including through bilingual videos on TikTok showing the proper way to gear up with respirators, eye protection, gloves, and coveralls. And Colorado’s health and agriculture departments have offered a free month’s supply of protective equipment to any producer who requests it.
But so far, many farms aren’t taking them up on it: According to numbers provided by the state health department in late August, fewer than 13% of the state’s dairies had requested and received such PPE.
The virus is known to infect mammals — from skunks, bears, and cows to people and house pets. It began showing up in dairy cattle in recent months, and Colorado has been in the thick of it. Ten of the 13 confirmed human cases in the U.S. this year have occurred in Colorado, where it continues to circulate among dairy cows. It isn’t a risk in cooked meat or pasteurized milk but is risky for those who come into contact with infected animals or raw milk.
Weld County, where the farmworker event was held, is one of the nation’s top milk producers, supplying enough milk each month this year to fill about 45 Olympic-size swimming pools, according to U.S. Department of Agriculture data. Neighboring counties are notable producers, too.
Concerns are growing about undiagnosed illness among farmworkers because of a lack of testing and safety precautions. One reason for concern: Bird flu and seasonal flu are capable of gene trading, so if they ended up in the same body at the same time, bird flu might end up with genes that boost its contagiousness. The virus doesn’t appear to be spreading easily between people yet. That could change, and if people aren’t being tested then health officials may be slow to notice.
Strains of seasonal flu already kill some 47,000 people in the U.S. a year. Public health officials fear the havoc a new form of the flu could wreak if it spreads among people.
The Centers for Disease Control and Prevention recommends that dairy workers don a respirator and goggles or a face shield, among other protections, whether they are working with sick animals or not.
A recent study found that not all infected cows show symptoms, so workers could be interacting with contagious animals without realizing it. Even when it is known that animals are infected, farmworkers often still have to get in close contact with them, sometimes under grueling conditions, such as during a recent heat wave when Colorado poultry workers collected hundreds of chickens by hand for culling because of the outbreak. At least six of the workers became infected with bird flu.
One dairy worker in Weld County, who spoke on the condition of anonymity for fear of losing his job, said his employer has not offered any protective equipment beyond gloves, even though he works with sick cows and raw milk.
His bosses asked the workers to separate sick cows from the others after some cows produced less milk, lost weight, and showed signs of weakness, he said. But the employer didn’t say anything about the bird flu, he said, or suggest they take any precautions for their own safety.
He said he bought protective goggles for himself at Walmart when his eyes became itchy and red earlier this summer. He recalled experiencing dizziness, headaches, and low appetite around the same time. But he self-medicated and pushed through, without missing work or going to a doctor.
“We need to protect ourselves because you never know,” he said in Spanish. “I tell my wife and son that the cows are sick, and she tells me to leave, but it will be the same wherever I go.”
He said he’d heard that his employers were unsympathetic when a colleague approached them about feeling ill. He’d even seen someone affiliated with management remove a flyer about how people can protect themselves from the bird flu and throw it in a bin.
The dairy worker in neighboring Larimer County said he, too, has had just gloves as protection, even when he has worked with sick animals — close enough for saliva to wipe off on him. He started working with them when a colleague missed work because of his flu-like symptoms: fever, headache, and red eyes.
“I only wear latex gloves,” he said. “And I see that those who work with the cows that are sick also only wear gloves.”
He said he doesn’t have time to wash his hands at work but puts on hand sanitizer before going home and takes a shower once he arrives. He has not had symptoms of infection.
Such accounts from dairy workers echo those from farmworkers in Texas, as reported by KFF Health News in July.
“Employers who are being proactive and providing PPE seem to be in the minority in most states,” said Bethany Boggess Alcauter with the National Center for Farmworker Health, a not-for-profit organization based in Texas that advocates for improving the health of farmworkers and their families. “Farmworkers are getting very little information.”
But Zach Riley, CEO of the Colorado Livestock Association, said he thinks such scenarios are the exception, not the rule.
“You would be hard-pressed to find a dairy operation that isn’t providing that PPE,” he said. Riley said dairies typically have a stockpile of PPE ready to go for situations like this and that, if they don’t, it’s easily accessed through the state. “All you have to do is ask.”
Producers are highly motivated to keep infections down, he said, because “milk is their life source.” He said he has heard from some producers that “their family members who work on the farm are doing 18-to 20-hour days just to try to stay ahead of it, so that they’re the first line between everything, to protect their employees.”
Colorado’s health department is advertising a hotline that ill dairy workers can call for help getting a flu test and medicine.
Project Protect Food Systems Workers, an organization that emerged early in the covid-19 pandemic to promote farmworker health across Colorado, is distributing PPE it received from the state so promotoras — health workers who are part of the community they serve — can distribute masks and other protections directly to workers if employers aren’t giving them out.
Promotora Tomasa Rodriguez said workers “see it as another virus, another covid, but it is because they don’t have enough information.”
She has been passing out flyers about symptoms and protective measures, but she can’t access many dairies. “And in some instances,” she said, “a lot of these workers don’t know how to read, so the flyers are not reaching them, and then the employers are not doing any kind of talks or trainings.”
The CDC’s Nirav Shah said during an Aug. 13 call with journalists that awareness about bird flu among dairy workers isn’t as high as officials would like it to be, despite months of campaigns on social media and the radio.
“There’s a road ahead of us that we still need to go down to get awareness on par with, say, what it might be in the poultry world,” he said. “We’re using every single messenger that we can.”
KFF Health News correspondents Vanessa G. Sánchez and Amy Maxmen contributed to this report.
Healthbeat is a nonprofit newsroom covering public health published by Civic News Company and KFF Health News. Sign up for its newsletters here.
KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.
Subscribe to KFF Health News’ free Morning Briefing.
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Healthy Recipes When There Are A Lot Of Restrictions
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It’s Q&A Day at 10almonds!
Have a question or a request? We love to hear from you!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small 😎
❝I need to cook for a family event and the combined dietary restrictions are: vegetarian, no lactose, no gluten, no nuts, including peanuts and coconuts, no discernible carbs, including lentils and chickpeas, no garlic or onions, no cabbage, no soup, and it can’t be remotely spicy. The nut allergy is of course absolute and we are vegetarian, the other things may be slightly negotiable but I’d like a stress-free dinner. Ideas?❞
That is indeed quite restrictive! But a challenge is (almost) always fun.
To answer generally first: one approach is to do buffet-style dining, with many small dishes. While nuts will still need to be absent, because of the nature of nut allergies, the rest can just be skipped on a per-person basis.
But, let’s see what we can do with a one-dish-fits-all approach!
The biggest challenge seems to be getting protein and flavor. Protein options are more limited without meat, lactose, or legumes, and flavor requires some attention without being able to rely on spices.
To give a sample à la carte menu… With these things in mind, we’ve selected three of our recipes from the recipes section of our site, that will require only minor modifications:
1) Invigorating Sabzi Khordan: skip the walnuts and either partition or omit the scallions, and ensure the cheese is lactose-free (most supermarkets stock lactose-free cheeses, nowadays).
With regard to the flatbreads, you can either skip, or use our gluten-free Healthy Homemade Flatbreads recipe, though it does use chickpea flour and quinoa flour, so the “no discernible carbs” person(s) might still want to skip them. If it’s not an issue on the carbs front, then you might also consider, in lieu of one of the more traditional cheeses, using our High-Protein Paneer recipe which, being vegan, is naturally lactose-free. Also, which is not traditional but would work fine, you might want to add cold hard-boiled halved eggs, since the next course will be light on protein:
2) Speedy Easy Ratatouille: skip the red chili and garlic; that’s all for this one!
3) Black Forest Chia Pudding: the glycemic index of this should hopefully be sufficient to placate the “no discernible carbs” person(s), but if it’s not, we probably don’t have a keto-friendlier dessert than this. And obviously, when it comes to the garnish of “a few almonds, and/or berries, and/or cherries and/or cacao nibs”, don’t choose the almonds.
Want to know more?
For any who might be curious:
Gluten: What’s The Truth? ← this also discusses the differences between an allergy/intolerance/sensitivity—it’s more than just a matter of severity!
Take care!
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MSG vs. Salt: Sodium Comparison
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It’s Q&A Day at 10almonds!
Q: Is MSG healthier than salt in terms of sodium content or is it the same or worse?
Great question, and for that matter, MSG itself is a great topic for another day. But your actual question, we can readily answer here and now:
- Firstly, by “salt” we’re assuming from context that you mean sodium chloride.
- Both salt and MSG do contain sodium. However…
- MSG contains only about a third of the sodium that salt does, gram-for-gram.
- It’s still wise to be mindful of it, though. Same with sodium in other ingredients!
- Baking soda contains about twice as much sodium, gram for gram, as MSG.
Wondering why this happens?
Salt (sodium chloride, NaCl) is equal parts sodium and chlorine, by atom count, but sodium’s atomic mass is lower than chlorine’s, so 100g of salt contains only 39.34g of sodium.
Baking soda (sodium bicarbonate, NaHCO₃) is one part sodium for one part hydrogen, one part carbon, and three parts oxygen. Taking each of their diverse atomic masses into account, we see that 100g of baking soda contains 27.4g sodium.
MSG (monosodium glutamate, C₅H₈NO₄Na) is only one part sodium for 5 parts carbon, 8 parts hydrogen, 1 part nitrogen, and 4 parts oxygen… And all those other atoms put together weigh a lot (comparatively), so 100g of MSG contains only 12.28g sodium.
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How To Reduce Your Alzheimer’s Risk
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Reduce Your Alzheimer’s Risk
Alzheimer’s is just one cause of dementia, but it’s a very notable one, not least of all because it’s
- a) the most common cause of dementia, and
- b) a measurably terminal disease.
For that reason we’re focusing on Alzheimer’s today, although most of the advice will go for avoiding dementia in general.
First, some things not everyone knows about Alzheimer’s:
- Alzheimer’s is a terminal disease.
- People who get a diagnosis at age 60 are typically given 4–8 years to live.
- Some soldier on for as many as 20, but those are rare outliers.
- Alzheimer’s begins 20 years or more before other symptoms start to develop.
- This makes this information very relevant for younger people approaching 40, for example.
- Alzheimer’s accounts for 60–80% of dementia, and affects around 6% of people over 60.
- By the age of 65, that figure is 10%. By the age of 70, however, the percentage is still about the same—this is because of the mortality rate preventing the accumulation of Alzheimer’s patients over time.
Want to know more? Read: 2023 Alzheimer’s Disease Facts And Figures Special Report ← this is a very comprehensive downloadablereference, by the way, including a lot of information about diagnosis, treatmentpathways, and earlyinterventions.
Speaking of diagnosis…
Know what the symptoms are… and aren’t!
Forgetting your car keys can be frustrating. Forgetting them frequently can be worrying.
But: there’s a difference between forgetting your car keys, and forgetting what car keys are used for. The latter is the kind of memory loss that’s more of a red flag for Alzheimer’s.
Similarly: forgetting someone’s name can be embarrassing. Forgetting someone’s name, asking them, forgetting asking them, asking them again, forgetting again (lather rinse repeat) is more of a red flag for Alzheimer’s.
There are other symptoms too, some of them less commonly known:
❝Difficulty remembering recent conversations, names or events; apathy; and depression are often early symptoms. Communication problems, confusion, poor judgment and behavioral changes may occur next. Difficulty walking, speaking, and swallowing are common in the late stages of the disease❞
If you or a loved one are experiencing worrying symptoms: when it comes to diagnosis and intervention, sooner is a lot better than later, so do talk to your doctor.
As for reducing your risk? First, the obvious stuff:
The usual 5 things that go for almost everything:
- Have a good diet—the Mediterranean Diet is once again recommended (we expect this will not be a surprise to regular readers!)
- Get regular exercise—in the case of avoiding Alzheimer’s and other dementias, typically the most important thing here is heart health, so getting regular cardiovascular exercise, such walking, running, or dancing is great. Cycling too. Swimming, not so much. Not that swimming’s bad or anything, it’s just that when your body is horizontal, the heart has less work to do, especially in the upper part of the body, because it’s not defying gravity. Similarly, yoga is great for the health but won’t particularly help with this, nor will weight training.
- Get good sleep—as we get older, we tend to need less sleep, and tend more towards the lower end of the standard “7–9 hours” prescription, but getting at least those 7 hours makes a huge difference.
- Cut down (or eliminate) alcohol consumption—and especially avoid binge-drinking. While “binge-drinking” is typically associated with young people, that Christmas party where that one uncle gets very drunk is also binge-drinking, for example. Plus, heavy drinking in early life has also been correlated with higher risk of Alzheimer’s later.
- Don’t smoke. It’s bad for everything, and Alzheimer’s risk is no exception.
How much do lifestyle changes alone make a difference?
They make a big difference. This 2022 population-based cohort study (so: huge sample size) looked at people who had 4–5 of the healthy lifestyle factors being studied, vs people who had 0–1 of them. They found:
❝A healthy lifestyle was associated with a longer life expectancy among men and women, and they lived a larger proportion of their remaining years without Alzheimer’s dementia.❞
The numbers of years involved by the way ranged between 3 and 20 years, in terms of life expectancy and years without or with Alzheimer’s, with the average increase of healthy life years being approximately the same as the average increase in years. This is important, because:
A lot of people think “well if I’m going to go senile, I might as well [unhealthy choice that shortens lifespan]”, but they misunderstand a critical factor:
The unhealthy choices will reduce their healthy life years, and simply bring the unhealthy ones (and subsequent death) sooner. If you’re going to spend your last few years in ill-health, it’s better to do so at 90 than 50.
The other thing you may already know… And a thing about it that not everyone considers:
Keeping cognitively active is important. This much is broadly known by the general public, and to clinicians, this was the fourth “healthy factor” in the list of five (instead of the sleep that we put there, because we were listing the 5 things that go for most preventable health issues).
Everyone leaps to mention sudoku at this point, so if that’s your thing, great, enjoy it! (This writer personally enjoys chess, which isn’t everyone’s cup of tea; if it yours though, you can come join her on Chess.com and we’ll keep sharp together)
But the more parts of your mental faculties you keep active, the better. Remember, brainpower (as with many things in health and life) is a matter of “use it or lose it” and this is on a “per skill” basis!
What this means: doing sudoku (a number-based puzzle game) or chess (great as it may be) won’t help as much for keeping your language skills intact, for example. Given that language skills are one of the most impactful and key faculties to get lost to Alzheimer’s disease, neglecting such would be quite an oversight!
Some good ways to keep your language skills tip-top:
- Read—but read something challenging, if possible. It doesn’t have to be Thomas Scanlon’s What We Owe To Each Other, but it should be more challenging than a tabloid, for example. In fact, on the topic of examples:
- This newsletter is written to be easy to read, while not shying away from complex ideas or hard science. Our mission is literally to “make [well-sourced, science-based] health and productivity crazy simple”.
- But the academic papers that we link? Those aren’t written to be easy to read. Go read them, or at least the abstracts (in academia, an abstract is essentially an up-front summary, and is usually the first thing you’ll see when you click a link to a study or such). Challenge yourself!
- Write—compared to reading/listening, producing language is a (related, but) somewhat separate skill. Just ask any foreign language learner which is more challenging: reading or writing!
- Journaling is great, but writing for others is better (as then you’ll be forced to think more about it)
- Learn a foreign language—in this case, what matters it that you’re practicing and learning, so in the scale of easy to hard, or doesn’t matter if it’s Esperanto or Arabic. Duolingo is a great free resource that we recommend for this, and they have a wide range of extensive courses these days.
Now for the least obvious things…
Social contact is important.
Especially in older age, it’s easy to find oneself with fewer remaining friends and family, and getting out and about can be harder for everyone. Whatever our personal inclinations (some people being more introverted or less social than others), we are fundamentally a social species, and hundreds of thousands of years of evolution have built us around the idea that we will live our lives alongside others of our kind. And when we don’t, we don’t do as well.
See for example: Associations of Social Isolation and Loneliness With Later Dementia
If you can’t get out and about easily:
- Online socialising is still socializing.
- Online community is still community.
- Online conversations between friends are still conversations between friends.
If you don’t have much (or anyone) in the category of friends and family, join Facebook groups related to your interests, for example.
Berries are surprisingly good
^This may read like a headline from 200,000 BCE, but it’s relevant here!
Particularly recommended are:
- blueberries
- blackberries
- raspberries
- strawberries
- cranberries
We know that many of these berries seem to have a shelf-life of something like 30 minutes from time of purchase, but… Frozen and dried are perfectly good nutritionally, and in many cases, even better nutritionally than fresh.
Read: Effect of berry-based supplements and foods on cognitive function: a systematic review
Turmeric’s health benefits appear to include protecting against Alzheimer’s
Again, this is about risk reduction, and turmeric (also called curcumin, which is not the same as cumin) significantly reduces the build-up of amyloid plaques in the brain. Amyloid plaques are part of the progression of Alzheimer’s.
See for yourself: Protective Effects of Indian Spice Curcumin Against Amyloid Beta in Alzheimer’s Disease
If you don’t like it as a spice (and even if you do, you probably don’t want to put it in your food every day), you can easily get it as a supplement in capsule form.
Lower your homocysteine levels
Lower our what now? Homocysteine is an amino acid used for making certain proteins, and it’s a risk factor for Alzheimer’s.
Foods high in folate (and possible other B-vitamins) seem to lower homocysteine levels. Top choices include:
- Leafy greens
- Cruciferous vegetables
- Tomatoes
Get plenty of lutein
We did a main feature about specifically this a little while ago, so we’ll not repeat our work here, but lutein is found in, well, the same things we just listed above, and lower levels of lutein are associated with Alzheimer’s disease. It’s not a proven causative factor—we don’t know entirely what causes Alzheimer’s, just a lot of factors that have a high enough correlation that it’d be remiss to ignore them.
Catch up on our previous article: Brain Food? The Eyes Have It
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How Science News Outlets Can Lie To You (Yes, Even If They Cite Studies!)
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Each Monday, we’re going to be bringing you cutting-edge research reviews to not only make your health and productivity crazy simple, but also, constantly up-to-date.
But today, in this special edition, we want to lay out plain and simple how to see through a lot of the tricks used not just by popular news outlets, but even sometimes the research publications themselves.
That way, when we give you health-related science news, you won’t have to take our word for it, because you’ll be able to see whether the studies we cite really support the claims we make.
Of course, we’ll always give you the best, most honest information we have… But the point is that you shouldn’t have to trust us! So, buckle in for today’s special edition, and never have to blindly believe sci-hub (or Snopes!) again.
The above now-famous Tumblr post that became a meme is a popular and obvious example of how statistics can be misleading, either by error or by deliberate spin.
But what sort of mistakes and misrepresentations are we most likely to find in real research?
Spin Bias
Perhaps most common in popular media reporting of science, the Spin Bias hinges on the fact that most people perceive numbers in a very “fuzzy logic” sort of way. Do you?
Try this:
- A million seconds is 11.5 days
- A billion seconds is not weeks, but 13.2 months!
…just kidding, it’s actually nearly thirty-two years.
Did the months figure seem reasonable to you, though? If so, this is the same kind of “human brains don’t do large numbers” problem that occurs when looking at statistics.
Let’s have a look at reporting on statistically unlikely side effects for vaccines, as an example:
- “966 people in the US died after receiving this vaccine!” (So many! So risky!)
- “Fewer than 3 people per million died after receiving this vaccine!” (Hmm, I wonder if it is worth it?)
- “Half of unvaccinated people with this disease die of it” (Oh)
How to check for this: ask yourself “is what’s being described as very common really very common?”. To keep with the spiders theme, there are many (usually outright made-up) stats thrown around on social media about how near the nearest spider is at any given time. Apply this kind of thinking to medical conditions.. If something affects only 1% of the population (So few! What a tiny number!), how far would you have to go to find someone with that condition? The end of your street, perhaps?
Selection/Sampling Bias
Diabetes disproportionately affects black people, but diabetes research disproportionately focuses on white people with diabetes. There are many possible reasons for this, the most obvious being systemic/institutional racism. For example, advertisements for clinical trial volunteer opportunities might appear more frequently amongst a convenient, nearby, mostly-white student body. The selection bias, therefore, made the study much less reliable.
Alternatively: a researcher is conducting a study on depression, and advertises for research subjects. He struggles to get a large enough sample size, because depressed people are less likely to respond, but eventually gets enough. Little does he know, even the most depressed of his subjects are relatively happy and healthy compared with the silent majority of depressed people who didn’t respond.
See This And Many More Educational Cartoons At Sketchplanations.com!
How to check for this: Does the “method” section of the scientific article describe how they took pains to make sure their sample was representative of the relevant population, and how did they decide what the relevant population was?
Publication Bias
Scientific publications will tend to prioritise statistical significance. Which seems great, right? We want statistically significant studies… don’t we?
We do, but: usually, in science, we consider something “statistically significant” when it hits the magical marker of p=0.05 (in other words, the probability of getting that result is 1/20, and the results are reliably coming back on the right side of that marker).
However, this can result in the clinic stopping testing once p=0.05 is reached, because they want to have their paper published. (“Yay, we’ve reached out magical marker and now our paper will be published”)
So, you can think of publication bias as the tendency for researchers to publish ‘positive’ results.
If it weren’t for publication bias, we would have a lot more studies that say “we tested this, and here are our results, which didn’t help answer our question at all”—which would be bad for the publication, but good for science, because data is data.
To put it in non-numerical terms: this is the same misrepresentation as the technically true phrase “when I misplace something, it’s always in the last place I look for it”—obviously it is, because that’s when you stop looking.
There’s not a good way to check for this, but be sure to check out sample sizes and see that they’re reassuringly large.
Reporting/Detection/Survivorship Bias
There’s a famous example of the rise in “popularity” of left-handedness. Whilst Americans born in ~1910 had a bit under a 3.5% chance of being left handed, those born in ~1950 had a bit under a 12% change.
Why did left-handedness become so much more prevalent all of a sudden, and then plateau at 12%?
Simple, that’s when schools stopped forcing left-handed children to use their right hands instead.
In a similar fashion, countries have generally found that homosexuality became a lot more common once decriminalized. Of course the real incidence almost certainly did not change—it just became more visible to research.
So, these biases are caused when the method of data collection and/or measurement leads to a systematic error in results.
How to check for this: you’ll need to think this through logically, on a case by case basis. Is there a reason that we might not be seeing or hearing from a certain demographic?
And perhaps most common of all…
Confounding Bias
This is the bias that relates to the well-known idea “correlation ≠ causation”.
Everyone has heard the funny examples, such as “ice cream sales cause shark attacks” (in reality, both are more likely to happen in similar places and times; when many people are at the beach, for instance).
How can any research paper possibly screw this one up?
Often they don’t and it’s a case of Spin Bias (see above), but examples that are not so obviously wrong “by common sense” often fly under the radar:
“Horse-riding found to be the sport that most extends longevity”
Should we all take up horse-riding to increase our lifespans? Probably not; the reality is that people who can afford horses can probably afford better than average healthcare, and lead easier, less stressful lives overall. The fact that people with horses typically have wealthier lifestyles than those without, is the confounding variable here.
See This And Many More Educational Cartoons on XKCD.com!
In short, when you look at the scientific research papers cited in the articles you read (you do look at the studies, yes?), watch out for these biases that found their way into the research, and you’ll be able to draw your own conclusions, with well-informed confidence, about what the study actually tells us.
Science shouldn’t be gatekept, and definitely shouldn’t be abused, so the more people who know about these things, the better!
So…would one of your friends benefit from this knowledge? Forward it to them!
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