Survey response rates: national and regional differences in a European multicentre study of vertebral osteoporosis.


STUDY OBJECTIVE This analysis aimed to compare the response rates of those invited to attend for screening in a multicentre, multinational study within Europe. DESIGN This was a population survey. SETTING Thirty four centres in 16 European countries. SUBJECTS Men and women aged 50 years and over were recruited from population based sampling frames to… (More)


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