Eating fish for its health benefits is not new. However, in recent years there have been reports about just how much and what types of fish are safe to consume given higher levels of mercury and other toxins found in some types of fish, such as swordfish and mackerel. The broadcast attempts to explain the latest evidence on the risks of eating fish by describing a newly published Institute of Medicine (IOM) consensus report which clarifies safety concerns about eating fish, especially for certain populations (i.e. pregnant women and children under 12).
The broadcast also cites a new study on the association between moderate consumption of fish (about 6 oz. a week) and a reduced risk of heart disease. However, there are other confounding issues not mentioned here: eating fish twice a week is not a sole method of preventing heart disease, but only part of a heart-healthy program of diet and exercise. The story does note that the findings of this study are not clear-cut and researchers are not sure just how fish plays a role in preventing heart disease. Other methods of dietary prevention or contributing factors of heart disease are briefly discussed (e.g. Fish may replace fatty meats in the diet).
The story reports that the IOM concluded that, for most people, the health benefits of eating a moderate amount of fish each week outweighs any risks of ingesting environmental toxins. The story provides a balanced message about eating a variety of fish and accurately reports the recommendations and rationale of the IOM report. We are given the relative risk reduction of developing heart disease associated with eating a moderate amount of fish each week, but no absolute risk estimates. (Read more about absolute vs. relative risks.) The story also provides no quantitative evidence about the risks of eating certain fish, especially for pregnant women. In order to weigh the cost to benefit ratio of eating fish, the health consumer needs this information.
The story cites public health researchers not affiliated with the fish study, as well as one of the IOM report co-authors. The story doesn't mention the cost of fish in the diet, however, the Journal of American Medical Association article cited does provide a detailed cost estimate of including a moderate amount of fish (1-2 times per week) in this diet. This cost is about 9 cents/day, or 63 cents/wk. The actual (net) costs would be lower because intake of fish would replace intake of other source of protein.
The story doesn't discuss the cost of fish in the diet, but the Journal of American Medical Association article cited does provide a cost estimate of eating a moderate amount of fish 1-2 times per week, which is about 9 cents/day, or 63 cents/week. The actual (net) costs would be lower because intake of fish would replace intake of other source of protein.
We are told eating fish may reduce the risk of dying from a heart attack by about a third, but are given no absolute data. (Read more about absolute vs. relative risk.)
The story does note that government health agencies agree mercury and other toxins are higher in certain types of fish and consumption should be limited to 2 times a week for certain groups (such as pregnant women). We are not told exactly why this is dangerous and how likely potential harms may occur with this level of consumption in people not in these groups. There is no quantitative data on the risks of mercury in certain fish for high-risk groups (pregnancy women, children under twelve, etc).
The story provides no quantitative evidence from either the government report or JAMA article on the safety of moderate amounts of certain fish for pregnant women or for the general population. We are given the relative risk reduction on heart disease by eating a moderate amount of fish each week from a recent study, but not given the study design or absolute risk reduction. (Read more about absolute vs. relative risk.)
The story attempts to explain the latest evidence on the risks of eating fish due to high levels of mercury or dioxins. The story notes that the Institute of Medicine's (IOM) report concluded that for most people, the health benefits of a moderate amount of fish each week outweigh any risks of ingesting environmental toxins. The story provides a balanced message about eating a variety of fish and accurately reports the recommendations and rationale of the IOM report.
The story cites public health researchers not affiliated with the report, as well as one of the IOM report co-authors.
The story cites a new study on the association between moderate consumption of fish and a reduced chance of developing heart disease. However, there are other confounding issues here, and eating fish twice a week or more is not a sole method of preventing heart disease. The story does note that the findings of this study are not clear-cut and researchers are not sure just how fish plays a protective role for heart disease. We do not know whether people who consume fish eat less red meat or omega-3 fatty acids in fish protect against heart disease. Other methods of dietary prevention or contributing factors of heart disease are briefly discussed (e.g. Skipping fatty meats).
Fish is known to be widely available.
It's clear from the story that the discussion about risks and benefits from fish in the diet is not new.
The story provides several sources and does not appear to rely solely or largely on a news release.
Systematic, Criteria-Driven
Questions to ask about new Alzheimer’s drug research by @KatKStone incl:
-does study focus on patient outcomes or surrogate markers?
-does study rely on selective subgroups? (yield more favourable outcomes)
-who were the patients? https://www.healthnewsreview.org/2017/08/6-questions-to-ask-when-writing-and-reading-about-new-alzheimers-research/#.YRw5xNVXths.twitter @HealthNewsRevu
Monday at #ADA2021, an infectious disease epidemiologist, a journalist, and a researcher shared perspectives on communication of risk in the era of COVID-19: http://ow.ly/ROfR30rMeE7 @AstleyCM @garyschwitzer @berthahidalgo @ADA_DiabetesPro
Shoutouts to @susan_bewley @drkevinknopf @MichaelBaum11 in this call for more than fawning coverage from press releases for these kinds of stories.
Also, linked history inside goes back 5 years just on Grail apparently trying to become Holy Grail. https://twitter.com/garyschwitzer/status/1408849696416841731
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