Table 1. Characteristics of participating summer day camps (SDCs) and children by intervention and control at baseline.
| Baseline (Summer 2015) | Outcome (Summer 2016) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Intervention | Control | P difference b | Intervention | Control | P difference b | |||||
| SDC Characteristics | ||||||||||
| Total children (n) | 904 | 926 | 797 | 762 | ||||||
| Average enrollment (n) | 90.4 | ±46.4 | 92.6 | ±47.9 | 0.91 | 79.7 | ±32.2 | 76.2 | ±36.2 | 0.82 |
| Girls (%) | 46.3 | 43.6 | 0.27 | 52.2 | 37.9 | 0.002 | ||||
| Physical Activity Space (ft2) | ||||||||||
| Indoor | 10,390.4 | ±5,135.7 | 13,058.5 | ±4,928.1 | 0.13 | - | - | - | ||
| Outdoor | 172,226.0 | ±180,402.9 | 259,411.0 | ±170,088.8 | 0.28 | - | - | - | ||
| Population in Poverty, Census 2014 (%) | 15.1 | ±8.9 | 11.8 | ±4.7 | 0.32 | - | - | - | ||
| Location (n) | 0.03 | |||||||||
| School | 2 | 3 | - | - | - | |||||
| Faith/church | 3 | 0 | - | - | - | |||||
| Community (e.g., recreation center) | 2 | 7 | - | - | - | |||||
| Other (e.g., strip mall, military base) | 3 | 0 | - | - | - | |||||
| Temperature (°F) | ||||||||||
| High | 95.2 | ±2.9 | 95.8 | ±3.3 | 0.39 | 95.5 | ±3.4 | 93.6 | ±4.5 | 0.03 |
| Low | 74.7 | ±2.9 | 74.7 | ±2.7 | 0.96 | 76.8 | ±3.1 | 76.8 | ±3.7 | 0.95 |
| Child Characteristics | ||||||||||
| Race/Ethnicity (%) | 0.15 | 0.06 | ||||||||
| White non-Hispanic | 38.2 | 13.2 | 37.5 | 17.7 | ||||||
| African American | 54.4 | 80.8 | 56.4 | 78.9 | ||||||
| Other | 7.5 | 6.0 | 6.0 | 3.5 | ||||||
| Age (years, M, SD) | 7.9 | ±2.0 | 8.0 | ±1.8 | 0.32 | 8.0 | ±1.8 | 7.8 | ±2.0 | 0.55 |
| Children Assessed via Accelerometry (n) | ||||||||||
| Children wearing accelerometer | 582 | 536 | 614 | 536 | ||||||
| Average number of days | 2.2 | 2.3 | 2.2 | 2.4 | ||||||
| Children meeting accelerometer inclusion criteria a | 576 | 512 | 602 | 519 | ||||||
| Average hours of wear time | 8.5 | ±0.3 | 8.6 | ±0.5 | 0.20 | 8.5 | ±0.3 | 8.3 | ±0.4 | 0.29 |
a Accelerometer inclusion criteria wear time ≥240 minutes per day.
b P-value for comparison between intervention and control at baseline and outcome. Continuous variables at the SDC-level compared using two-sample t-tests or Mann Whitney U-test where appropriate; categorical variables compared using χ2 tests.
Statistically significant differences are bolded.