No abstract

Living arrangements and dietary patterns were examined for 3,477 adults aged 65 to 74 from the first National Health and Nutrition Examination Survey 1971 to 1974 (NHANES I). Several indicators of dietary variety, diet composition, and energy and nutrient intake from both the 24-hour recall, and the dietary frequency questionnaires were analyzed. Dietary patterns of older men were associated more strongly with type of living arrangement and income compared with older women. Men living with a spouse consistently had more favorable dietary patterns than either those living alone or those living with someone other than a spouse. Low income men who were not living with a spouse were at highest risk of poor dietary intake. Income was associated more consistently with the dietary indicators than type of living arrangement for women. Income, however, was still a less consistent influence on dietary patterns of older women compared to older men.

This study used the frequency of food-use data collected previously in the Western New York Diet Study, a case-control study of diet and cancer at various sites, to develop measures of dietary patterns for subsequent use in epidemiologic research. Factor analysis was applied to frequency-of-use data of 110 foods for 1475 male and 780 female control subjects. Nine dietary-pattern factors were extracted for each gender. Correlational analyses examined relationships with intakes of nutrients of concern to cancer epidemiologists--energy, total fat, dietary fiber, and vitamins A and C. Findings indicate that the usual measure for assessing dietary risks, quantile of nutrient intake, reflects several dietary patterns differing in their composition of cancer risk factors. Furthermore, patterns may relate to such variables as age, ethnicity, and income, which are themselves related to cancer. This approach may provide a comprehensive measure of dietary exposure for epidemiologic research.

Seven dietary patterns were identified among control subjects in the Western New York Diet Study (1975-1986) by application of principal components analysis to data from a 95-item food frequency interview. The results of case-control analyses of colon cancer risk for these patterns are presented. Cases were matched with neighborhood controls on the bases of age and sex; 205 colon case-control male and 223 female pairs were obtained. The dietary patterns and intakes of energy, total fat, and dietary fiber were examined with logistic regression for their individual contributions to risk. In males, three of these dietary patterns were associated positively with fat and energy consumption; they elevated risk for colon cancer and accounted for more risk than did the specific nutrients. Control for energy and fat intakes allowed the protective influences of additional dietary patterns to be expressed. No patterns elevated risk in women; two patterns were protective for colon cancer. Controlling for energy and fat intake enhanced the protection afforded by one of these patterns but had no influence on that of the other. Measures of foods rather than single nutrients may be more inclusive of dietary exposures to risk as well as being related more directly to underlying health behaviors. Therefore they may be better able to account for risk in diseases with multiple causation.

The causes and intensity of role-related stress experienced by paediatric oncology nurses, the nurses' ability to respond to the stressors, and the professional and personal consequences of those stressors for the nurses are issues of concern for administrators and staff. The concern evolves from the anticipated relationships among stressors, the ability to cope with role-related stressors, and the expected negative outcomes such as resignation. However, the relationships among these components have not been previously measured concurrently in paediatric oncology nurses. The primary purpose of this study was to test the complete stress-response sequence model in a sample of paediatric oncology nurses by obtaining concurrent measures of the model's individual components: nurses' stressors, reactions, mediators, and consequences. A total of 126 nurses completed six questionnaires (Stressor Scale for Paediatric Oncology Nurses, Perceived Stress Scale, Measure of Job Satisfaction, Organized Commitment Questionnaire, Group Cohesion Scale, and Intent to Leave) and a demographic sheet. The majority of participating nurses were married, worked full-time and had worked 5 or more years in oncology. Qualitative data were analysed using a semantic content analysis technique. Relationships among the components of the model were examined using a two-stage least squares technique. The components were only weakly associated and unable to explain significant variation in each other. The combined qualitative and quantitative data indicate that an important explanatory variable - role-related meaning - is missing in the content model.