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Coronary calcification in relation to age. Agatston score in the 50th percentile in the Heinz Nixdorf Recall Study (HNR) and in earlier, exclusively patient-based studies: Raggi (e16), Hoff (e17), Mitchell (e18), and Nasir (e19). The two arrows indicate different Agatston scores (125 and 200), illustrating how the curve of the population-based studies is shifted by 6 to 8 years compared to studies of selected patient cohorts (16).
