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Table 1 Adjusted mean percent of moderate and vigorous physical activity (as a function of total accelerometer wear time) by center-level predictor variables in linear mixed models

From: Environmental factors associated with physical activity in childcare centers

Predictor Variable Description N Adjusted Mean Percent of MVPA (SE)
Physical Characteristics
Suitability of indoor playspace Quiet play 6 12.0 (0.9)*
Limited movement 23 13.6 (0.5)
All activities 5 14.9 (1.0)
(referent category)   
Posters, books, pictures of PA in class Yes 18 14.8 (0.7)+
No 17 13.0 (0.7)
Classroom area (upper quartile split) <1248 ft2 26 13.5 (0.6)
≥1248 ft2 8 15.0 (1.0)
Playground area (upper quartile split) <5436 ft2 25 13.7 (0.6)
≥5436 ft2 10 14.3 (0.9)
Fixed equipment (median split) <10 15 13.3 (0.7)
≥10 19 14.5 (0.7)
Portable equipment (median split) <21 16 14.5 (0.7)
≥21 18 13.5 (0.7)
Sedentary equipment (median split) <9 18 14.4 (0.7)
≥9 16 13.5 (0.7)
Drinking water available outdoors Yes 9 14.7 (0.6)
No 26 13.6 (1.0)
Practices
Duration of outdoor play <60 minutes 27 13.4 (0.5)*
≥60 minutes 8 15.8 (1.0)
Num. of children on playground (median split) <16 16 14.4 (0.7)
≥16 19 13.4 (0.7)
Teacher-led outdoor PA Yes 22 13.3 (0.8)
No 13 14.2 (0.6)
Staff participation in indoor play Yes 17 13.3 (0.7)*
No 7 16.2 (1.1)
Staff participation in outdoor play Yes 15 13.3 (0.7)
No 20 14.3 (0.6)
Staff encouragement of PA in indoor play Yes 12 15.3 (0.8)*
No 12 12.9 (0.8)
Staff encouragement of PA in outdoor play Yes 12 13.5 (0.8)
No 23 14.1 (0.6)
Computer availability (to children) per observation day ≤15 minutes 22 14.5 (0.6)
(including no   
computer)   
>15 minutes 13 12.9 (0.8)
PA curriculum Yes 13 13.3 (0.8)
No 22 14.2 (0.6)
Other
Median household income of preschool block group1 Continuous (dollars)   Coeff = .003651 (.001515)*
NAEYC2 Yes 20 13.8 (0.6))
No 15 14.0 (0.8)
Head Start2 Yes 18 13.4 (0.7)
No 17 14.4 (0.7)
  1. Estimated marginal means, controlling for gender, age, and BMI percentile. Variables collected during on-site observation unless otherwise noted.
  2. 1 U.S. Census Bureau.
  3. 2 Interview.
  4. * p < 0.05.
  5. + borderline significant (p = 0.064).