Abstract
Background— Insulin-like growth factor I (IGF-I) has been suggested to be involved in the pathogenesis of atherosclerosis. We hypothesize that low IGF-I and high IGFBP-3 levels might be associated with increased risk of ischemic heart disease (IHD). Methods and Results— We conducted a nested case-control study within a large prospective study on cardiovascular epidemiology (DAN-MONICA). We measured IGF-I and IGFBP-3 in serum from 231 individuals who had a diagnosis of IHD 7.63 years after blood sampling and among 374 control subjects matched for age, sex, and calendar time. At baseline when all individuals were free of disease, subjects in the low IGF-I quartile had significantly higher risk of IHD during the 15-year follow-up period, with a relative risk (RR) of 1.94 (95% CI, 1.03 to 3.66) of IHD compared with the high IGF-I quartile group, when IGFBP-3, body mass index, smoking, menopause, diabetes, and use of antihypertensives were controlled for. Conversely, individuals in the high IGFBP-3 quartile gr...
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