Calcium supplements in the media

摘要

A. Osteoporosis is a progressive skeletal disease where low bone mass and deterioration of the micro architecture of the bone leads to increased risk of fragility fracture. The World Health Organization (WHO) has developed diagnostic criteria that define the progression of bone fragility based on comparing an individual's bone mineral density (BMD) with that of a young healthy population. The scale has been collated from epidemiological studies on white Caucasian females and has not been validated for other populations. Under this scheme a BMD value within one standard deviation of the young adult mean (referred to as T score -1) is classified as normal. Osteopenia is diagnosed if the value is between -1 and -2.5 standard deviations below the young adult average (T score between -1 and -2.5), and osteoporosis is defined as a T score of-2.5 or less.The risk of fracture in men is thought to be lower than that predicted by the classification system.