Table 1.
Characterization of the immunoassays for angiotensinogen, gremlin‐1, and MMP‐7.
| Albumin | Angiotensinogen | Gremlin‐1 | MMP‐7 | |
|---|---|---|---|---|
| Intra‐assay CV (%) | ND | 8.2 (5.4) | 13.3 (4.4) | 5.4 (5.2) |
| Interassay CV (%) | ND | 14 (9) | 20 (14) | 9 (7) |
| Intraindividual CV over 12 months (%) | ||||
| 24 h AER | 64 | 42 | 37 | 51 |
| 24 h ACR | 56 | 57 | 21 | 28 |
| Spot ACR | 46 | 64 | 15 | 29 |
| Stability at room temperature (% of reference) | ||||
| 1 h incubation (reference) | ND | 100 | 100 | 100 |
| 6 h incubation | 89 | 93 | 99 | |
| 24 h incubation | 68 | 86 | 94 | |
| 48 h incubation | 63 | 51 | 88 | |
| Stability to freeze–thaw (% of reference) | ||||
| 1 freeze–thaw (reference) | ND | 100 | 100 | 100 |
| 2 freeze–thaws | 95 | 99 | 98 | |
| 5 freeze–thaws | 92 | 87 | 94 | |
Values for intra‐ and interassay CVs are represented as mean (SD). ND, not determined.