Manduck, think this way: at any given time, you have a certain likelihood, or risk, of dying right then. This likelihood is dependent upon everything from risk of heart attack, or stroke, to risk of lightning strike, to risk of getting hit on the head by an asteroid, to getting eaten by a rampaging dinosaur that was conjured up in a biolab from ancient DNA and then escaped from the confines through a random turn of poor planning and sabotage.
Suppose your risk of dying from a cardiac event is 0.007%. A 200% increase in your risk of dying means your risk increases from 0.007% to 0.021%. That 200% greater risk. It’s measured against whatever your prior risk level was. You can set the nominal “non smoker” at 1 and then say if he smokes a pack a day, his risk is now 3. That’s 200% greater.
I think a larger problem is the mixing of statistics that mean different things and try to equate the relationships. For example, the discussion of statistics in the cholesterol part are talking about your lifetime risk. Your lifetime risk of developing heart disease goes up 12 to 14% when your serum cholesterol goes up by 6 yo 7%. Fine, but the next statistic is then about decreasing dietary cholesterol reducing your risk of death by 37%. That statistic isn’t particularly clear. Is that instantaneous risk, or risk of death from cardiovascular issues across your lifetime? In other words, you are still 100% certain to die, but your death is less likely to be from cardiovascular issues, which means more likely to be from a car accident, or kidney failure, or getting hit over the head by a jealous lover. Because that piece of the risk pie has to go somewhere.
Then flipping that, which Cecil admits probably isn’t kosher, and then projecting downward a linear relationship for the increase of serum cholesterol to the risk of death (which likely isn’t accurate), to conclude eating six strips of bacon increases serum cholesterol by 22 mg/1000 kcal, and thereby increase risk of death by cardiovascular problems by 4%.
And what does 22 mg/1000 kcal mean? Is that 1000 kcal of bacon? Overall diet? Where does that number come from? The reduction of 200 mg per 1000 kcal is a whole dietary number. It isn’t food specific. So how does 6 sticks of bacon become a per entire food intake basis?
It’s an interesting thought piece, and amusing to think about, but I agree, I wouldn’t want to defend any of this to a PhD committee, either.