This question has been bothering me for sometime now, Hpw do researchers estimate the increased risk from doing a bad thing like: smoking and how is life expectancy then calculated when this risk factor is introduced?
This question has been bothering me for sometime now, Hpw do researchers estimate the increased risk from doing a bad thing like: smoking and how is life expectancy then calculated when this risk factor is introduced?
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By looking at the statistics about lots of people who have done the same thing. Lots of studies have followed people throughout part of their lives, and some have even gone on all the way from birth to death (and thus also across generations of scientists), in order to figure out things like this.
It’s a weird one. My grandpa is 86 and has been smoking cigs since he was 11. He only smokes half darts now, but still smokes. Fuckin ol’ iron lung.
They just do statistics on all of the people that have died, and check off which things they did throughout their life, and then notice patterns with age of death and which things they did
For example, let’s say they have a record of 1000 deaths between the ages of 60-100
And they notice that the ones who died closer to 60 tended to be smokers more often than the ones who died closer to 100