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Figure 8 | Breast Cancer Research

Figure 8

From: Relationship of serum estrogens and estrogen metabolites to postmenopausal breast cancer risk: a nested case-control study

Figure 8

Comparison of estrone and estradiol measurements by LC-MS/MS and RIA. The top graphs compare levels of total and unconjugated estradiol measured by LC-MS/MS (y axis) to estradiol measured by RIA (x axis). The two leftmost graphs on the bottom compare levels of total and unconjugated estrone (by LC-MS/MS), respectively, to estrone (by RIA); the rightmost bottom graph compares total estrone (LC-MS/MS) to estrone sulfate (RIA). All axes are logarithmically scaled. LC-MS/MS, liquid chromatography tandem mass spectrometry; RIA, radioimmunoassay.

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