Life events, chronic strain, and psychological distress: Longitudinal causal models

This prospective study examines the causal relations among life events, chronic strain, and psychological distress. The influence of total number of life events; recent events; and undesirable, disruptive, and unanticipated events on marital strain and work/economic strain is assessed using latent variable structural equation modeling. It is hypothesized that chronic strain mediates the effects of life events on psychological distress. The data analyzed are from the first two waves of a prospective study on psychosocial factors and cancer mortality in a sample of skilled blue collar workers exposed to asbestos. A subsample of married and employed men within a relatively narrow age range was selected for this study to facilitate the investigation of the relations among life events, strain, and distress among individuals similarly situated in the life course. The results show that total number of events and recent, undesirable, disruptive, and unanticipated events increase work/economic strain and that, through this increase in strain, life events influence both contemporaneous levels of psychological distress and changes in distress. Life events do not have a direct effect on psychological distress when prior levels of events, work/economic strain, and distress are controlled. In contrast, life events do not have an impact on marital strain; rather, marital strain exerts a direct effect on distress. Undesirable, unanticipated, and disruptive events exert modest but significant direct effects on psychological distress in models including marital strain. These findings are discussed in terms of the place of the sample of workers in the life course, and implications for the design of preventive intervention programs are presented.