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Figure 1 | BMC Geriatrics

Figure 1

From: A polymorphic variant of the insulin-like growth factor 1 (IGF-1) receptor correlates with male longevity in the Italian population: a genetic study and evaluation of circulating IGF-1 from the "Treviso Longeva (TRELONG)" study

Figure 1

Age-related reduction of circulating IGF-1. Scatter-plot showing individual plasma IGF-1 levels measured by a dedicated ELISA kit, described in Methods. The superimposed line indicates the simple linear interpolation, whose equation and statistical significance are shown in the box on the graph. r: correlation coefficient.

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