JAMA : the journal of the American Medical Association
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This study was undertaken to determine the relationship between thyroid supplements and breast cancer. The incidence of breast cancer among the patients who received thyroid supplements was 12.13%, while in the control group it was 6.2%. ⋯ The incidence of breast cancer among nulliparous women who received thyroid supplements was 33%, while in the nulliparous women without thyroid supplements the incidence was only 9.25%. Even in a specific age group, the incidence rate of breast cancer was higher among patients receiving thyroid supplements, when compared to the control patients in the same age group.
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The population of a community of 29,608 adults was screened door-to-door for elevated blood pressure. Of 12,371 adults screened, 20% were classified as hypertensive. After repeated blood-pressure measurement, however, there were only 9% with sustained hypertension, while 11% had labile hypertension. ⋯ In contrast, sustained hypertension was least prevalent in the young and increased with age. Labile hypertension was most prevalent in white men, and sustained hypertension was more prevalent in blacks than in whites. Labile hypertension represents a large segment (52%) of the population initially identified as having hypertension in a home blood-pressure survey.