Table 4.
Comparative Testing Across Alternative E2 Assays.
| Prior Characterization | Beckman UniCel DXI |
Roche e602 |
Siemens Centaur XP |
Abbott ARCHITECT i2000SR |
|
|---|---|---|---|---|---|
| E2 (pg/mL) | E2 (pg/mL) | E2 (pg/mL) | E2 (pg/mL) | ||
| Pt. B | E2 interference | INDa | 29.69 | 29 | 39.22 |
| Pt. Jd | uE3 interference | 23b | <5 | 183 | 22.46 |
| Pt. H | uE3 interference | 227b | >3000c | >1000c | >3000c |
| Pt G | uE3 interference | 4061b | >3000c | >1000c | >3000c |
a
E2 interference identified.
b
uE3 interference previously identified.
c
Other assay E2 results consistent with pregnancy status; dilutions not performed due to limited specimen volumes.
d
Pt. J specimen tested by LC-MS/MS method for E2 (result: 11 pg/mL).