The impact of population screening for cardiovascular disease on quality of life.

Aims: To examine the impact of population screening-generated events on quality of life: invitation, positive test result, initiation of preventive medication, enrolment in follow-up at the surgical department, and preventive surgical repair. Methods and results: A difference-in-difference design based on data collected alongside two randomized controlled trials where general population men were randomized to screening for cardiovascular disease or to no screening. Repeated measurements of health-related quality of life (HRQoL) were conducted up to 3 years after inclusion using all relevant scales of the EuroQol instrument: the anxiety/depression dimension, the EuroQol 5-dimension profile index (using Danish preference weights), and the visual analogue scale for global health. We compare the mean change scores from before to after events for groups experiencing vs. not experiencing the events. Propensity score matching is additionally used to provide both unmatched and matched results. Invitees reported to be marginally better off than non-invitees on all scales of the EuroQol. For events of receiving the test result, initiating preventive medication, being enrolled in surveillance, and undergoing surgical repair, we observed no impact on overall HRQoL but a minor impact of being enrolled in surveillance on emotional distress, which did not persist after matching. Conclusion: The often-claimed detrimental consequences of screening to HRQoL could not be generally confirmed. Amongst the screening events assessed, only two possible consequences were revealed: a reassurance effect after a negative screening test and a minor negative impact to emotional distress of being enrolled in surveillance that did not spill over to overall HRQoL.