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Predictors of postmenopausal osteoporosis: Study methods and analysis require clarification

EDITOR—Hodson and Marsh say that ultra-sound may be a promising screening or diagnostic test for detecting osteoporosis.1 Clarification is necessary before their findings can be accepted. Their population, selected on the basis of perceived risk, has a higher risk (16%) than would normally be expected in primary care (4%).2 Interpretation of diagnostic data …