The premise of this study seemed to be that a periodic health
examination is effective in improving health outcomes. The authors
acknowledged that the US Preventive Services Task Force recommendations
are specifically based upon age, sex and risk factors. However, they
concluded that they could define a typical "lapsed user" as (among other
things)a 25-44 year old male who smokes and doesn't exercise, but is
otherwise in apparently good health.
If these "lapsed users" were to have some kind of periodic routine
medical checkup, what evidence is there that they would receive effective
clinical preventive services related to smoking and physical activity?
Many physically inactive smokers who already contact the medical care
system for established routine periodic health examinations, and other
reasons, do not receive effective clinical preventive services to address
these behaviors.
It seems premature to conclude that these "lapsed users" should
undergo routine medical checkups unless they are specifically going to
receive effective clinical preventive services aimed at their smoking and
physical inactivity. The preventive task force recommends counseling for
smokers and those who are physically inactive, but they do not recommend
routine medical checkups and they do not claim that counseling is
effective.
I also suggest that the authors clarify if they really meant to day
that poststratification weights were used to correct for selection bias.