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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
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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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