Background
Methods
Study design and setting
Recruitment
Intervention | Control | |
---|---|---|
Total School Enrollment | 369.7 ± 96.6 | 385 ± 121.9 |
Total 2nd and 3rd Grade Enrollment (N = 1902) | 978 | 924 |
2nd and 3rd Grade Class Size | 22.5 ± 5.3 | 20.4 ± 2.6 |
Urban/Rural Schools (n/n) | 6/3 | 6/2 |
Minority (%) | 23.8 | 30.2 |
Free/reduced lunches (%) | 35.3 | 42.5 |
Intervention (n = 370) | Control (n = 317) | |
---|---|---|
Age (years) | 7.6 ± 0.6 | 7.6 ± 0.6 |
Height (cm) | 129.6 ± 6.5 | 129.6 ± 6.9 |
Weight (kg) | 29.6 ± 7.2 | 29.6 ± 7.7 |
Waist (cm) | 57.6 ± 7.5 | 57.1 ± 7.7 |
BMI Percentile | 61.1 ± 29.3 | 61.1 ± 30.0 |
Female (%) | 47.9 | 53.1 |
Minority (%) | 16.3 | 23.2 |
Free/reduced lunches (%) | 26.5 | 36.7 |
A + PAAC lessons: description
A + PAAC: prescribed amount/intensity
A + PAAC: classroom teacher training
Outcome measures
Research staff training and blinding
Academic achievement
Cognitive function: modified Eriksen flanker task
Cognitive function: spatial n-back task
Anthropometrics (Height/weight/waist circumference)
Cardiovascular fitness
Attention-to-task
Daily physical activity: accelerometry
Process evaluation
Results
Analysis plan-primary aim: academic achievement
Analysis plan- secondary aim: mediation analysis
Exploratory analysis
Missing data
Sample size/power
Schools per treatment | Students per school | Intra-Class correlation | |||||
---|---|---|---|---|---|---|---|
0 | 0.01 | 0.03 | 0.05 | 0.07 | 0.1 | ||
6 | 20 | 0.99 | 0.98 | 0.93 | 0.87 | 0.8 | 0.71 |
6 | 30 | 0.99 | 0.99 | 0.97 | 0.92 | 0.86 | 0.76 |
7 | 20 | 0.99 | 0.99 | 0.96 | 0.91 | 0.86 | 0.78 |
7 | 30 | 0.99 | 0.99 | 0.99 | 0.95 | 0.9 | 0.82 |