The relation of illness representations to the 'end-stage' appraisal of outcomes through health status, and the moderating role of optimism

The aim of this study was to examine an important pathway suggested by the common sense model (CSM): the relation of illness representations to the 'end-stage' appraisal of outcomes through health status. A further aim was to examine the moderating role of optimism in this relationship. One hundred and six chronic cardiac patients completed questionnaires about illness representations and dispositional optimism at baseline, and health status and illness-related helplessness (as an indicator of the 'end-stage' appraisal of outcomes) at a follow-up interview, 6 months later. Indirect (mediation) as well as conditional indirect (moderated mediation) effects were examined using bootstrapped models. According to the results, the effect of illness representations on helplessness was mediated by at least one of the health measures used. Also, most of these indirect relations were conditional on the values of optimism. That is, optimism moderated the 'illness representations-health status-"end-stage" appraisal of outcomes' relationship, as the mediating effects were absent at higher levels of optimism. These findings can provide us with a more comprehensive picture of adaptation to illness, as well as of the ways the illness-related information is being processed by patients. Thus, they have significant implications for theory, research and practice.