[A]n adolescent who had smoked just one cigarette at age 11 was twice as likely to be a regular smoker at age 14 than those who had not tried a cigarette at age 11. This was true even for the kids who did not smoke again in the intervening years.
How can the 14 year old be considered a ‘regular smoker’ when he hasn’t smoked in three years?
I assume those were years in which he was 11, 12, and 13?
An implied floor(age) hadn’t occured to me. I suppose that means that on average the 14 year olds in question would have 0.5 years in which to become a regular smoker. An… interesting… thing to measure. The ones that would be most likely to be smokers would then be those that are closer to 15 than 14.
How can the 14 year old be considered a ‘regular smoker’ when he hasn’t smoked in three years?
I assume those were years in which he was 11, 12, and 13?
An implied floor(age) hadn’t occured to me. I suppose that means that on average the 14 year olds in question would have 0.5 years in which to become a regular smoker. An… interesting… thing to measure. The ones that would be most likely to be smokers would then be those that are closer to 15 than 14.