Role of personality traits in reporting the development of adverse drug reactions: a prospective cohort study of the Estonian general population

Objective To examine the role of the Five Factor Model (FFM) personality traits in reporting the development of adverse drug reactions (ADRs) when controlling for sociodemographic variables and health status. Design Prospective cohort study. Setting The Estonian Biobank of the Estonian Genome Centre, University of Tartu. Participants 814 women and 543 men (mean age=47.9 years; SD =15.2) who after the initial enrolment in the Estonian Biobank were re-contacted for follow-up purposes about 5.3 years after the enrolment and for whom both self- and informant-reported personality data were available. Main outcome measure Participants who did not report having any ADRs at baseline but who reported ADRs at the follow-up about 5.3 years later versus participants who did not report any ADRs at either time point. The reports of developing ADRs were predicted from the FFM personality traits after statistically controlling for sociodemographic variables (age, gender and education), baseline indicators of health status (number of diagnoses and medicines taken, body mass index and blood pressure), and the change in health status between the two measurements. Results The results of a hierarchical binary logistic regression analysis showed that participants who reported the development of ADRs between the two measurements had higher levels of conscientiousness, were more likely to be women, were taking more medicines at baseline and had a higher increase in the number of medicines taken during the study period than participants who did not report any ADRs at either time point (all p values Conclusions This study shows for the first time that higher levels of conscientiousness and neuroticism are associated with reporting the development of ADRs.