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Table 3 Dynamic models 1 of gains in BMI, FFM or FM by category of physical activity change. Persistently medium/low MVPA is the reference

From: Physical activity and fat mass gain in Mexican school-age children: a cohort study

 

Decreasing

Increasing

Persistently high

 

β

95%CI

β

95%CI

β

95%CI

ΔBMI model N = 205 (Boys = 87, Girls = 118)

Girls

−0.19

−0.77, 0.39

−0.22

−2.02, 1.59

−0.25

−0.91, 0.40

Boys

0.16

−0.89, 1.21

0.76

0.06, 1.44*

0.41

−0.15, 0.97

ΔFFM model N = 196 (Boys = 84, Girls = 112)

Girls

0.16

−0.45, 0.77

0.08

−1.36, 1.52

0.43

−0.11, 0.97

Boys

0.67

−0.39, 1.72

1.10

0.37, 1.84*

0.20

−1.43, 1.84

ΔFM model N = 196 (Boys = 84, Girls = 112)

Girls 2

−1.36

−1.93, -0.79**

−1.23

−2.14, -0.33*

−1.06

−1.62, -0.50**

Boys

−0.30

−1.77, -1.18

0.39

−0.75, 1.53

0.52

−0.59, 1.62

  1. Abbreviations: MVPA = moderate-vigorous physical activity, ΔFM = fat mass gain, ΔFFM = fat free mass gain, ΔBMI = BMI gain β = regression coefficient, CI = confidence interval.
  2. 1 Adjusted by initial BMI, FM or FFM, respectively, and initial energy intake and height, age, gender, socioeconomic status and changes in energy intake and height. Grouping variable = School affiliation during the first survey. R2 for models: BMI = 0.18; FFM = 0.20; FM = 0.55.
  3. 2 P value of increasing x gender interaction: 0.044; P value of persistently high x gender interaction: 0.048.
  4. Level of statistical significance: * P value < 0.05; ** P value < 0.01.
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BMC Pediatrics

ISSN: 1471-2431

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