On 2015 Jul 13, CREBP Journal Club commented:

This article offers an example of a high quality cohort study. Our discussion centred on grading the risk of bias of this study. We agreed that the risk of bias for this study was low; thus, the results can be considered valid. The findings also corroborate those reported in previous similar cohort studies.¹ This study provides an example of how to appropriately conduct a cohort study and we plan to use it as an example for teaching. The study findings could be used to inform the content of motivational messages to encourage smoking cessation. We noted that most of the participants started smoking in adolescence or early adulthood and we believed these age groups could be an ideal target for smoking cessation interventions.

1.Doll R et al. Mortality in relation to smoking: 50 years’ observations on male British doctors. Br Med J. 2004; 328: 1519–28.

On 2015 Jul 13, CREBP Journal Club commented:

This article offers an example of a high quality cohort study. Our discussion centred on grading the risk of bias of this study. We agreed that the risk of bias for this study was low; thus, the results can be considered valid. The findings also corroborate those reported in previous similar cohort studies.¹ This study provides an example of how to appropriately conduct a cohort study and we plan to use it as an example for teaching. The study findings could be used to inform the content of motivational messages to encourage smoking cessation. We noted that most of the participants started smoking in adolescence or early adulthood and we believed these age groups could be an ideal target for smoking cessation interventions.

1.Doll R et al. Mortality in relation to smoking: 50 years’ observations on male British doctors. Br Med J. 2004; 328: 1519–28.