Plasma neurofilament light chain levels in each of the age classes in controls
| Age class (years) | N | 5th P | 25th P | Median (50th percentile) | 75th P | 95th P |
| <30 | 8 | 3.69 | 4.40 | 5.01 | 6.73 | 7.22 |
| 30.0–39.9 | 25 | 4.00 | 6.02 | 7.26 | 7.99 | 11.47 |
| 40.0–49.9 | 24 | 4.61 | 6.96 | 8.25 | 9.62 | 11.60 |
| 50.0–54.4 | 19 | 5.42 | 7.10 | 8.73 | 10.29 | 14.26 |
| 55.0–59.9 | 20 | 7.20 | 8.11 | 9.84 | 11.86 | 16.80 |
| 60.0–64.9 | 21 | 7.38 | 9.09 | 12.03 | 14.36 | 23.41 |
| 65.0–69.9 | 23 | 9.82 | 12.55 | 15.14 | 19.05 | 27.27 |
| ≥70 | 25 | 11.70 | 14.57 | 17.52 | 22.83 | 31.60 |
Values are indicated in pg/mL.