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Table 4 Model implied within group change and difference in change in daily estimates of obesogenic behaviors between groups

From: The impact of summer vacation on children’s obesogenic behaviors and body mass index: a natural experiment

Construct Behavior   Condition 1 vs. Condition 2 Condition 2 vs. Condition 3
Within Group Between Groupa Within Group Between Groupb
Change 95CI Difference in Change 95CI Change 95CI Difference in Change 95CI
Physical Activity Sedentary minutes Traditional 35.1 (26.0, 44.2) 24.2 (10.2, 38.2) 7.8 (−3.0, 18.7)    
Year-round 10.9 (0.2, 21.6)     62.3 (49.9, 74.7) 54.5 (38.0, 70.9)
LPA minutes Traditional −36.0 (−43.7, −28.3) −23.4 (−35.3, −11.6) −13.1 (−22.3, −4.0)    
Year-Round −12.6 (−21.6, −3.6)     −55.4 (−65.9, −44.9) − 42.2 (−56.2, −28.3)
MVPA minutes Traditional 0.9 (−3.3, 5.2) −0.6 (−7.2, 5.9) 5.1 (−0.1, 10.1)    
Year-round 1.6 (−3.4, 6.6)     −6.3 (−12.2, −0.5) −11.4 (−19.1, − 13.7)
Screen Time Screen Time minutes Traditional 50.1 (39.8, 60.5) 33.7 (17.2, 50.3) −0.1 (−10.5, 10.3)    
Year-round 16.4 (3.5, 29.3)     46.4 (33.7, 59.2) 46.5 (30.0, 63.0)
Diet Unhealthy Foods Index Traditional 0.18 (0.00, 0.35) 0.08 (−0.20, 0.36) 0.09 (−0.09, 0.27)    
Year-round 0.10 (−0.12, 0.32)     0.09 (−0.13, 0.30) 0.00 (−0.28, 0.28)
Healthy Foods Index Traditional 0.01 (−0.09, 0.11) 0.16 (−0.01, 0.32) 0.05 (−0.05, 0.15)    
Year-round −0.15 (−0.27, − 0.02)     −0.05 (−0.18, 0.07) −0.11 (− 0.27, −0.06)
Sleep Sleep min Traditional 12.7 (6.6, 18.9) 16.1 (6.5, 25.6) 3.9 (−4.0, 11.8)    
Year-round −3.3 (−10.6, 4.0)     19.5 (9.8, 29.1) 15.6 (3.1, 28.0)
Sleep Midpoint Time Traditional 85:03 (79:49, 90:17) 73:43 (65:33, 81:53) 17:24 (10:46, 24:02)    
Year-round 11:19 (5:03, 17:36)     112:19 (104:12, 120:25) 95:54 (85:26, 106:22)
Sleep Efficiency % Traditional −0.8 (−1.0, −0.5) −0.7 (−1.1, −0.3) 0.2 (−0.2, 0.5)    
Year-round −0.1 (−0.4, 0.2)     −0.3 (−0.7, 0.1) 0.5 (−1.0, 0.0)
  1. Abbreviations “MVPA” Moderate to vigorous physical activity, “LPA” Light physical activity
  2. Bolded text represents statistically significant point estimates at Benjamini-Hochberg critical value of ≤0.05 with a 10% false discovery rate
  3. a Interaction is calculated by subtracting year-round from traditional
  4. b Interaction is calculated by subtracting traditional from year-round
  5. Condition 1 = Both traditional and year-round students attend school
  6. Condition 2 = Traditional students are on summer vacation from school while year-round students are attending school
  7. Condition 3 = Both traditional and year-round students are on summer vacation from school