Table 1. The Diabetes Prevention Study sample.
| Characteristic | Intervention cases | Controls |
| Number of individuals (n) | 190 | 188 |
| 1st DNA sample available (n) | 162 | 172 |
| 2nd DNA sample available (n) | 171 | 172 |
| Women | 64.7% | 67.0% |
| Age at inclusion to the study (years) | 55.83 (±7.17) | 55.45 (±6.97) |
| Age at DNA sampling (years) | ||
| 1st DNA sample | 57.07 (±7.06) | 56.69 (±6.98) |
| 2nd DNA sample | 61.58 (±7.09) | 61.17 (±6.97) |
| Time between 1st and 2nd DNA sample (years) | 4.56 (±0.57) | 4.53 (±0.68) |
| Relative telomere length | ||
| 1st DNA sample | 0.84 (±0.18) | 0.86 (±0.18) |
| 2nd DNA sample | 0.96 (±0.23) | 0.97 (±0.26) |
| Telomere length yearly change, n | 0.027 (±0.052), 150 | 0.022 (±0.048), 161 |
| BMI (kg/m2) | ||
| 1st DNA sample | 29.8 (±4.2) | 30.8 (±4.7) |
| 2nd DNA sample | 30.4 (±4.9) | 31.2 (±5.1) |
| Change (between 1st and 2nd DNA sampling) | 0.49 (−6.10; 8.77) | 0.46 (−5.57; 9.06) |
Data are number of individuals, mean ± SD, median (range) or %.