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Discussion
This study investigated the relationships among stress, personality type, anger , and chronic disease. Two of the four hypotheses, discussed previously, were found to be true. Consistent with the work of Garon and Mantel (2003), the correlation between stress level and disease was very significant. However, its worth noting that the affect of personality type was statistically insignificant. The lack of relationship between personality and chronic disease is inconsistent with previous studies (Harrison et al., 2006; Davis, Wolf and Jones, 2004). The ANOVA that compares high- and low-anger participants yielded the most significant finding (p = .001, d = .78). The data was consistent with previous research showing that anger effected stress level (Harrison, Holstein, Calf, Grobeck, & Nelson, 2006). Higher levels of reported anger were associated with significantly less stress. These findings have important implications for health psychologists. Facilitating a person’s expression of anger can reduce stress and lower their risk for disease.
Two of the desired inclusion criterion for the participant sample were not met. The vast majority of subjects were Caucasian. Orientals, Mexican-Americans, and blacks accounted for only 9% of the sample. Also, there were too few female participants; there were twenty-five women and two hundred men. Thus, the data could not be used to examine whether gender or ethnicity impacted risk for disease.
This study extends the work of Parlick & Wilson (2007) whose research the American
Psychosomatic Society (as cited in Parlick & Wilson, 2007) recently honored as “cutting edge in the field”.

They argue, “The progress made in late 20th century stress research has exceeded expectations. Our rapidly growing understanding of psychological factors, in the development and treatment of chronic disease, has set the stage for major breakthroughs in health psychology (p. 195).”
Bibliography
Davis, T., Wolf, M., & Jones, F. (2004). Disease and personality. Psychological Summaries, 45, 45-67. doi: 10/873420.tgl0001
Garon, D. and Mantel, J. (2003). Stress and disease. In M. Wilson (Ed.), Psychology of Disease (p. 12-38). Boston: Po Press.
Harrison, B. T., Holstein, C., Calf, F. T., Grobeck, A., & Nelson, F. V. (2006). Introversion-extroversion predicts disease states [Electronic version]. Psychological Summaries, 43(4), 257-289. Retrieved, December 8, 2007 from http:/healthcareusa.com.htm
Parlick, T., & Wilson, M. (2007). Health and Mind. Paris: Dix.