Table 2. Serum concentrations of estradiol and testosterone at age 50 weeks in apoE−/− and apoE+/+ mice with and without transgenic human CRP.
Serum concentrations, median (range)
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Genotype | n | Testosterone, nmol/liter | Estradiol*, pmol/liter | n (%) undetectable values |
apoE+/+ | 13 | 1.6 (0.6-151.2) | 486 (324-664) | 0 |
apoE+/+-hCRP | 18 | 2.4 (0.6-116.8) | 471 (344-720) | 0 |
apoE−/− | 19 | 1.6 (0.2-79.2) | 102 (49-300) | 9 (47.4) |
apoE−/−-hCRP | 15 | 2.6 (0.2-49.2) | 99 (99-268) | 11 (73.3) |
p† | 0.34 | 0.0001 | 0.0001 |
The estradiol assay had a sensitivity of 50 pmol/liter. Serum samples were of limited volume and had to be diluted 1:1 or 1:2 for measurement. Values for samples that were undetectable at these dilutions are replaced by the cut-off multiplied by the dilution minus 1 (e.g., <50 when diluted at 1:2 is replaced by 99; when diluted at 1:1, it is replaced by 49). The P values obtained by nonparametric analysis are not significantly changed by using a different replacement value.
Kruskal-Wallis test.