Yesterday I posted about a new addition to the nurses health study, and put out the word, as requested, to recruit more victims..uh subjects for the study.
Now, there is nothing really wrong with the study, except that the data is used to make sweeping conclusions and statements about health. In my opinion, many of the questions are highly flawed in that they don’t allow you to answer correctly. In the questionnaire on diet and supplements, for example, they asked about your intake of fruits and veggies. They have a note in the margin that says..
Please try to average your seasonal use of foods over the entire year. For example, if a food such as cantaloupe is eaten 4 times a week during the approximate 3 months that it is in season, then the average use would be once per week.
Are they kidding or what? But yes, that’s what it said on the questionnaire. As if eating peaches a few times a week when they are in season and then not eating them all winter is the same thing as eating one peach a week all year round. So in other words, the nutrients and fiber that you get from a peach sort of paces itself, just a like a timed release capsule.
Now if that isn’t dumb enough, do I really know how many cups of blueberries I eat a week? I don’t measure them out, I just eat them. How many apricots do I eat in a week?
The only way to keep an accurate account is to have a food diary. But this is to be done from memory.
In some part of this particular questionaire, you also cannot specifically say that you don’t eat a certain food, ever. They give you a choice of “never or less than once per month.” That is not the same as never eating it.
In a few questions, they don’t even give you that. For example, they ask “How often do you eat toasted breads, bagel or English muffin (e.g., slice or 1 half bagel)?”
There is no way to answer that you don’t eat toast, bagels or English muffins. The “least” answer is less than once a week.
Also omitted are very crucial questions pertaining to the type of food you eat. They ask about adding sugar to beverages, but don’t really ask about the consumption of sugar laden–yes, there are questions about eating cakes, cookies, etc, but it really doesn’t give a full picture. They also don’t ask about the amount of processed foods eaten, about foods containing questionable additives, organic foods, amount of raw food eaten, etc. If the produce you eat is fresh vs. frozen vs. canned.
The questions about breads, cereals, etc, do not allow you to say that you eat whole wheat pasta, for example. Or sweet potatoes as opposed to regular potatoes. The list of vegetables and fruits they ask about is pathetically small, and at the end, they allow you to add in any other “important” foods. Three to be exact. Wow, generous.
They ask about eggs, but nowhere can you enter if you eat free range/organic eggs. You can’t say that you absolutely eat no processed meats whatsoever. Or do not drink soda, diet or otherwise. They list soy products, such as burgers, miso, tempeh, etc, in the vegetable section. I realize that soy is a vegetable, but many people eat it as a main dish, as in soy burgers and hot dogs. They really should split it up–soy as vegetable like edame, and put soy main dishes in a separate category. Ideally, they should really have a separate list for people who eat no meat at all, because it is impossible to answer this questionaire accurately if you happen to adhere to a vegetarian or vegan diet.
Anyway, this questionnaire is really sad, and it is frightening that they are pulling data out of it and drawing conclusions about diet and health. There is so much missing from it, and it relies totally on memory…oh, and idiocy like pro-rating your peach intake.