Table 1 Mean relative differences between fresh and frozen samples with their 95%CI, standard deviations of relative differences (SD), and p values obtained by applying one-sample Student’s t test
Biomarker | Mean relative difference (95%CI) | SD | p values t test |
|---|---|---|---|
Aβ40 | 0.059 (0.033, 0.084) | 0.10 | < 0.001 |
Aβ42 | 0.023 (− 0.004, 0.051) | 0.11 | 0.10 |
Aβ42/Aβ40 | − 0.039 (− 0.059, − 0.020) | 0.075 | < 0.001 |
t-tau | 0.044 (0.001, 0.086) | 0.16 | 0.04 |
p-tau | 0.017 (0.0015, 0.032) | 0.059 | 0.03 |