There are some things that stand out to me.
Let's look at some of the results:
Concerning BMI: vegetarians have the lowest mean BMI (M = 22.9), followed by subjects eating a carnivorous diet less rich in meat (M = 23.4), rich in fruits and vegetables (M = 23.5), and rich in meat (M = 24.9). Heavy meat eaters differ significantly from all other groups in terms of their BMI (p = .000).
Concerning physical exercise: no significant difference was found in the total MET score between the various dietary habit groups (p = .631).
Concerning smoking behavior: the number of cigarettes smoked per day did not differ between the various dietary habit groups (p = .302).
Concerning alcohol consumption: Subjects following a vegetarian diet (M = 2.6 days in the last 28 days) or a carnivorous diet rich in fruits and vegetables (M = 3.0 days) consume alcohol significantly less frequently than those eating a carnivorous diet less rich in meat (M = 4.4 days) or rich in meat (M = 4.8 days; p = .000).
Ok, so 2/4 are no difference. But in alcohol and BMI, vegetarians are slightly better (low BMI is generally better, no? Except when dangerously skinny, of course). As a side note, BMI is largely panned in the medical community as a legitimate way to indicate health. That this study measures it at all is a bit suspect.
But then comes the assertion that vegetarians are less healthy overall. Ok, cool. But there are other possible factors:
Vegetarians and subjects eating a carnivorous diet rich in fruits and vegetables consult doctors more often than those eating a carnivorous diet less rich in meat (p = .003). Moreover, vegetarians are vaccinated less often than all other dietary habit groups (p = .005) and make use of preventive check-ups less frequently than subjects eating a carnivorous diet rich in fruits and vegetables (p = .033; Table 2).
This, to me, is huge. Because it adds to the equation with several variables that can make a big difference.
And while their "strengths" and "limitations" summary is very thorough and very fair, the limitations stood out a bit more to me because of a couple very strong statements:
Unfortunately, food intake was not measured in more detail, e.g. caloric intake was not covered. Hence, further studies will be necessary to analyze health and its relationship with different forms of dietary habits in more detail.
and...
We cannot state whether a causal relationship exists, but describe ascertained associations.
In fact, I couldn't find anything concrete suggesting a casual link between vegetarianism and poor health. What I did see a lot of was a link between vegetarianism and poor health habits unrelated to diet alone.
Robtard made an excellent point that not all will know how to do vegetarianism in a healthy way. I've known quite a few who think they're saving the planet, but have no idea how to diet, and end up stuffed full of junk food and cheese after a few months. But I'd go one step further and say that there may be a relationship between the type of people who become vegetarians and a lack of proper all-inclusive health coverage (i.e. doctors, vaccinations, etc.). I doubt being vegetarian, in and of itself, is detrimental based on these findings. However, I do believe that being an Earth-goddess hippie, taking herbal supplements and healing one's chakras, instead of going to a licensed physician, is detrimental, vegetarian or not.
And as a side note, on a few occasions I would have been happier had they used median numbers instead of means. Their sample size was large enough to allay some of my concerns, but not entirely. Basically, I think the study was very fair, but dudemon's title is not (sorry, but thanks for posting), because it falls victim to the same sensationalistic tendencies that many media outlets do. Why not "Study tracks eating behavior and various health parameters"? Because on a news site this title will get more clicks, and on a forum it will elicit stronger reaction. Probably not dudemon's intention, but certainly its effect.
Originally posted by Stealth Moose
Not sure which is more shocking; Digi being a vegan or using a Mac.
I'm neither. Bada forgets that the mudslinging of the of the comic forums might actually be believed in these parts.
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