Table 1 Characteristics of participant schools and students
A Year-round Calendar | B Traditional Calendar | C Traditional Calendar | All Schools | |
|---|---|---|---|---|
Participating School Characteristics | ||||
Total Students | 389 | 443 | 417 | 1249 |
Male (%) | 49.4 | 60.5 | 50.4 | 53.6 |
Age in Years | 4–12 years | 4–12 years | 5–12 years | 4–12 years |
Grades | prek-6 | prek-6 | k-6 | prek-6 |
Race | ||||
White (%) | 28.8 | 23.5 | 34.3 | 28.7 |
Black (%) | 60.9 | 67.0 | 55.9 | 61.4 |
Other Race/ethnicity (%) | 10.3 | 8.5 | 8.8 | 8.8 |
Free & Reduced Priced Lunch (%) | 81.0 | 87.0 | 84.0 | 84.0 |
Current Study Participant Characteristics at Baseline | ||||
Number of participants | 97 | 93 | 95 | 285 a |
Male (%) | 59.2 | 44.2 | 41.5 | 48.7 |
Age in Years (SD) | 7.3 (1.3) | 7.6 (1.3) | 7.2 (1.2) | 7.4 (1.3) |
Grade (SD) | 2.4 (1.2) | 2.4 (1.2) | 2.2 (1.1) | 2.3 (1.1) |
BMI z-score (SD) | 0.56 (1.14) | 0.59 (1.40) | 0.66 (1.21) | 0.61 (1.23) |
Household Income | ||||
< 40,000 (%) | 55.9 | 60.0 | 55.3 | 57.0 |
≥ 40,000 (%) | 44.1 | 40.0 | 44.7 | 43.0 |
Race | ||||
White (%) | 24.7 | 19.6 | 42.4 | 29.5 |
Black (%) | 59.0 | 78.4 | 39.4 | 57.4 |
Other Race/ethnicity (%) | 6.9 | 0.0 | 13.6 | 7.4 |
Not reported (%) | 9.8 | 2.0 | 4.6 | 5.8 |
Mean Number of Measurement Waves with Valid Data (range 1–4) | 2.9 | 2.4 | 2.6 | 2.6 |
Mean Number of Valid Days of Data | ||||
Physical Activity (SD)b | 70.4 (31.4) | 50.5 (33.5) | 68.8 (39.0) | 63.6 (31.0) |
Sleep (SD) b | 35.4 (26.0) | 24.6 (30.3) | 32.5 (23.0) | 30.9 (26.2) |
Foods Consumed & Screen Time (SD) c | 26.8 (20.5) | 20.3 (19.3) | 23.4 (20.4) | 23.6 (20.1) |