Table 1. Participant demographics.
Descriptive statistics for all variables of interest and covariates collected during baseline and/or Year 2. Values represent mean (s.d.) unless specified otherwise. Genetic ancestry scores were utilized for all analyses, but self-report race and ethnicity data are included here for ease of interpretability.
| Baseline | Year 2 | |||
|---|---|---|---|---|
| Anthropometries | Waist circumference (%ile) | 59.56 (28.88) | 62.04 (28.05) | |
| Body Mass Index (%ile) | 58.44 (30.52) | 60.95 (30.60) | ||
| Underweight (%) | 4.03 | 3.78 | ||
| Healthy weight | 68.71 | 65.14 | ||
| Overweight | 13.46 | 15.35 | ||
| Obese | 13.80 | 15.73 | ||
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| Brain imaging variables | NAcc cellularity | 0.21 (0.02) | 0.22 (0.02) | |
| NAcc volume (cm3) | 5.80 (0.88) | 5.76 (0.88) | ||
| Head motion (mm) | 1.29 (0.52) | 1.16 (0.44) | ||
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| Participant demographics | Age (yrs) | 9.97 (0.61) | 11.96 (0.63) | |
| Sex (%F) | 44.62 | – | ||
| Puberty (stage) | ||||
| Prepuberty | 54.35% | 22.54% | ||
| Early puberty | 23.23% | 26.07% | ||
| Mid puberty | 21.69% | 33.64% | ||
| Late puberty | 0.73% | 17.75% | ||
| Race/ethnicity (%) | ||||
| White | 64.63 | |||
| Black | 10.89 | – | ||
| Hispanic | 16.12 | – | ||
| Asian | 0.69 | – | ||
| Other | 7.67 | – | ||
| Parent marital status (%M) | 73.89 | – | ||
| Parent income (%) | – | |||
| < $50,000 | 24.13 | – | ||
| $50,000 to $100,000 | 32.23 | – | ||
| > $100,000 | 43.63 | – | ||
| Parent education (%) | – | |||
| No high school diploma | 2.10 | – | ||
| High school diploma or GED | 5.14 | – | ||
| Some college | 25.42 | – | ||
| Bachelor’s degree | 30.78 | – | ||
| Post-graduate degree | 36.56 | – | ||
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| Dietary intake | Dietary fat (g) | – | 49.90 (21.80) | |
| Dietary carbohydrates (g) | – | 142.08 (55.14) | ||
| Dietary protein (g) | – | 50.76 (21.48) | ||
| Dietary fiber (g) | – | 10.36 (4.58) | ||
| Dietary caloric intake (kcal) | – | 120.32 (46.85) | ||