Wennerstad, Karin Modig; Silventoinen, Karri; Tynelius, Per - In: Social Science & Medicine 70 (2010) 4, pp. 575-581
It has been suggested that certain health behaviours, such as smoking, may operate as mediators of the well-established inverse association between IQ and mortality risk. Previous research may be afflicted by unadjusted confounding by socioeconomic or psychosocial factors. Twin designs offer a...