Table 1.
Characteristics of the ARIES sample
| Variable | Time point | Mean | SD | Min. | Max. | N (%) |
|---|---|---|---|---|---|---|
| Age (years) | years | 7.49 | 0.15 | 7.10 | 9.08 | |
| 17 years | 17.14 | 1.01 | 14.69 | 19.33 | ||
| DNA methylation age (years) | Birth | 0.26 | 0.63 | –0.59 | 16.68 | |
| 7 years | 8.25 | 2.42 | 2.50 | 24.80 | ||
| 17 years | 17.20 | 4.34 | 3.77 | 31.65 | ||
| Height (cm) | 7 years | 126.24 | 5.29 | 109.20 | 141.60 | |
| 17 years | 171.93 | 9.11 | 152.20 | 197.50 | ||
| Weight (kg) | 7 years | 26.22 | 4.73 | 17.60 | 51.40 | |
| 17 years | 66.99 | 14.92 | 44.20 | 147.40 | ||
| BMI (kg/m2) | 7 years | 16.37 | 2.22 | 12.65 | 29.15 | |
| 17 years | 22.61 | 4.47 | 16.26 | 50.06 | ||
| BMD (g/cm2) | 17 years | 1.19 | 0.10 | 0.95 | 1.56 | |
| Bone mass (g) | 17 years | 2814 | 547 | 1683 | 4666 | |
| Fat mass (g) | 17 years | 18 005 | 11 478 | 3485 | 82 194 | |
| Lean mass (g) | 17 years | 46 623 | 10 106 | 27 535 | 76 425 | |
| Birth weight (g) | 3418 | 547 | 645.00 | 5640 | ||
| Gestational age at delivery (weeks) | 39.46 | 1.86 | 25.00 | 47.00 | ||
| Parity (# previous pregnancies) | 0.7 | 0.8 | 0 | 5 | ||
| Maternal age at pregnancy (years) | 29.2 | 4.4 | 17 | 42 | ||
| Sex | Male | 445 (49) | ||||
| Female | 469 (51) | |||||
| Delivery method | Caesarean | 83 (9) | ||||
| Natural | 795 (91) | |||||
| Maternal smoking in pregnancy | Never | 545 (61) | ||||
| Quit | 248 (28) | |||||
| Smoker | 101 (11) |