authors considered each person’s lifestyle and chronotype, or preference for being an early bird or a night owl, interviewing them about when they ate meals and their sleeping habits. Participants also completed questionnaires about their eating habits and observance of cancer prevention recommendations such as physical activity and limiting alcohol consumption.
The researchers said that the effect of a longer supper-sleep interval was more noticeable in those who were following cancer prevention recommendations and in those who were morning types with both breast and prostate cancer.
About 27% of breast cancer patients followed the cancer prevention recommendations, compared with 31% of the control group. Similar results were found in the prostate cancer group.
The researchers interviewed the two group types twice, asking them about workday and weekend habits when they were 40 (or their current age, if younger) and about what they were doing a year before their cancer diagnosis or before they were interviewed.
Though 7% of the subjects also had after-supper snacks, the study focused on full meals, Kogevinas said.