Towards a psychosocial mediator model of hostility and CHD

Abstract

How might hostility contribute to the development of CHD? One possible explanation, labelled “psychosocial vulnerability”, is that hostile individuals inhabit a more taxing interpersonal world, and that increased stress, in turn, causes CHD. However, previous research testing this proposition has suffered from a measurement confound by employing self-reports of stress, social support, and hostility. One hundred and twelve subjects participated in the current study and completed the Cook-Medley Hostility scale. Then, each subject's closest friend was asked to estimate for the past year: (1) how many stressors had been encountered by the subject; (2) how easily the subject was upset by a stressor; (3) how many emotional reactions the subject disclosed after a stressor; and (4) how much social support was available to the subject. Results suggested that hostile men and women may both be phychosocially vulnerable, but they are so at different stages of the stressor-distress process. There was no relation between hostility and observed stressor frequency for either men or women, however, hostility in men was found to be related to increased distress in reaction to stressors and in women was related to decreased disclosure about these stressful events. Importantly, hostility in both men and women was related to decreased levels of observed social support, as compared to their non-hostile peers.