Determinants of participation in a longitudinal two-stage study of the health consequences of the Chornobyl nuclear power plant accident.

Background: The determinants of participation in long-term follow-up studies of disasters have rarely been delineated. Even less is known from studies of events that occurred in eastern Europe. We examined the factors associated with participation in a longitudinal two-stage study conducted in Kyiv following the 1986 Chornobyl nuclear power plant accident.