Table 1.
Characteristics of the Study Sample
| Overall | Minneapolis | San Diego | P-val | |
|---|---|---|---|---|
| Sample Size | 265 | 134 | 131 | |
| Mean Age years (sd) 8th grade | 13.9 (0.4) | 14.0 (0.3) | 13.8 (0.4) | .002 |
| Race-Ethnicity (%) 8th grade Non-Hispanic White |
54.3 | 82.8 | 25.2 | |
| Hispanic | 27.1 | 3.7 | 51.2 | .0001 |
| Black | 4.2 | 2.2 | 6.1 | |
| Asian | 7.9 | 7.5 | 8.4 | |
| Other | 6.4 | 3.7 | 9.2 | |
| Receive free or reduced lunch (%) 8th grade |
30.9 | 22.4 | 39.7 | .01 |
| Mother’s Education (%) Education <= high school |
37.4 | 18.7 | 56.5 | |
| Some College or higher | 59.6 | 79.9 | 38.9 | .0001 |
| Unknown | 3.0 | 1.5 | 4.6 | |
| BMI >= 85th percentile (%) | 30.9 | 23.1 | 38.9 | .01 |
| BMI >= 95th percentile (%) | 15.1 | 8.2 | 22.1 | .002 |
| % Body fat (sd) | 29.3 (9.6) | 27.4 (7.5) | 31.3 (11.0) | .06 |
| BMI (sd) (kg/m2) | 22.1 (5.2) | 21.1 (4.0) | 23.1 (6.1) | .002 |
| Physical activity (8th grade ) Sedentary (sd)(min/day) |
533.3 (61.5) | 541.7 (63.5) | 524.7 (58.3) | .02 |
| Moderate-vigorous (sd) (min/day) | 22.2 (10.1) | 22.3 (10.8) | 22.0 (9.4) | .22 |
| # sports/PA teams/classes (sd) | 3.4 (3.3) | 4.6 (3.7) | 2.1 (2.2) | .001 |
| Currently taking PE (%) | 85.7 | 73.9 | 97.7 | .001 |
| Mean Daily Minutes of Screen Time (sd) (measured at 1st FU) |
212.4 (116.6) | 215.8 (113.0) | 208.9 (120.6) | .63 |
| Dietary measures (1st FU) Total calories (sd) |
1703.2 (712.4) |
1701.1 (590.2) |
1705.4 (821.1) |
.96 |
| Snack calories (sd) | 370.1 (263.2) | 355.1 (224.1) | 385.5 (298) | .35 |
| SSB calories (sd) | 89.2 (94.6) | 76.6 (84.3) | 102.1 (102.9) | .03 |
| Servings of fruits/vegetable (sd) | 3.3 (2.0) | 3.2 (1.9) | 3.2 (2.2) | .79 |
| Neighborhood (1st follow-up) Percent White (sd) |
70.6 (23.2) | 93.2 (2.4) | 48.5 (5.0) | .0001 |
| Percent Hispanic (sd) | 14.0 (13.7) | 1.7 (1.2) | 26.5 (8.0) | .0001 |
| Percent households in poverty (sd) | 5.5 (3.6) | 3.3 (2.4) | 7.8 (3.2) | .0001 |
| Pop. density (1000/sq. mile) (sd) | 36.2 (24.7) | 16.9 (12.3) |
56.0 (17.6) | .0001 |
| Mean distance to high school (sd) | 2.6 (2.0) | 3.5 (2.1) | 1.7 (1.3) | .0001 |