Psychological depression and cancer.

Studies are reviewed which relate to five basic content areas of research concerning depression and cancer: significant loss experience, emotional inhibition, hopelessness, psychiatric assessment of depression, and test measurement of depression. Methodological issues within each area are addressed as they relate to the potential validity and generalizability of findings. In general, there is no support for increased loss experience in cancer patients and mild support for increased emotional inhibition and hopelessness in these individuals. Traditional psychiatric assessment approaches are not seen as providing solid evidence for a depression/cancer relationship due to reliability and design issues, while psychometric assessment provides mild support for a prospective relationship between depression and later cancer. Issues relating to approaches to research, means of measurement of depression, design issues, and questions of conceptualization of depression are discussed.