| Twins UK discovery cohort | Replication cohort | Total sample | |
| Subjects assessed for TRF | 1625 | 1165 | 2790 |
| Age (years)* | 47.9 (12.6) | 49.2 (13.6) | 48.5 (13.1) |
| Males* | – | 48.1 (13.8) | 48.1 (13.8) |
| Females* | 47.9 (12.6) | 49.5 (13.5) | 48.5 (13.0) |
| Sex | – | 264 | 264 |
| Males | 1625 | 901 | 2526 |
| Females | |||
| LTL* | 7.02 (0.67) | 6.91 (0.68) | 6.97 (0.68) |
| Males* | – | 6.68 (0.69) | 6.68 (0.69) |
| Females* | 7.02 (0.67) | 6.98 (0.66) | 7.01 (0.67) |
LTL, leucocyte telomere length.
*Values presented as mean (SD).