TABLE 1.
Pre‐analytical and analytical features used by the different centers (in %) for the measurement of AD biomarkers in CSF
| Participant centers (in %) | |
|---|---|
| Use of similar collection tube | 94.0 |
| Measurement on frozen sample | 97.0 |
| Automated immunoassay analyzer | 88.2 |
| Cutoff based solely on manufacturer's information | 16.6 |
| Dilution of t‐tau if above limits | 59.4 |
| Systematic measurement of Ab1‐40 | 58.1 |
| Use of the Ab1‐42/Ab1‐40 ratio | 82.3 |
| Use of other ratios than Ab1‐42/Ab1‐40 | 57.6 |
| Use of scales | 38.2 |
| Turnover < = 1 week | 34.5 |