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Table 4 Associations in time spent in different PA intensities with body composition indicators and fat free mass

From: Objectively measured physical activity levels and sedentary time in 7–9-year-old Estonian schoolchildren: independent associations with body composition parameters

 

Sum of skinfolds

Body fat percent

Waist-to-height ratio

Fat free mass

 

β

R2

P

β

R2

P

β

R2

P

β

R2

P

Sedentary time (min/day)

            

 Model 1

0.076

0.006

0.206

0.047

0.002

0.434

−0.023

0.001

0.701

−0.035

0.001

0.564

 Model 2

0.066

0.068

<0.0001

0.042

0.034

<0.021

−0.020

0.044

<0.006

−0.059

0.170

<0.0001

 Model 3

0.097

0.414

<0.0001

0.292

0.073

<0.0001

0.017

0.378

<0.0001

−0.078a

0.391a

<0.0001a

 Model 4

−0.002

0.430

<0.0001

−0.014

0.303

<0.0001

−0.069

0.390

<0.0001

−0.053a

0.482a

<0.0001a

Light PA (min/day)

            

 Model 1

0.031

0.001

0.603

0.075

0.006

0.211

0.133

0.018

<0.025

0.048

0.002

0.428

 Model 2

0.044

0.066

<0.0001

0.084

0.040

<0.01

0.134

0.061

<0.001

0.074

0.172

<0.0001

 Model 3

0.004

0.405

<0.0001

0.044

0.288

<0.0001

0.087

0.385

<0.0001

0.034a

0.386a

<0.0001a

 Model 4

0.090

0.420

<0.0001

0.132

0.303

<0.0001

0.149

0.393

<0.0001

−0.018a

0.480a

<0.0001a

Moderate PA (min/day)

            

 Model 1

−0.181

0.033

<0.002

−0.118

0.014

<0.010

−0.01

0.000

0.870

0.074

0.005

0.218

 Model 2

−0.136

0.081

<0.0001

−0.085

0.040

<0.01

−0.057

0.046

<0.005

0.017

0.166

<0.0001

 Model 3

−0.141

0.424

<0.0001

−0.095

0.295

<0.0001

−0.070

0.382

<0.0001

0.058a

0.388a

<0.0001a

 Model 4

−0.134

0.424

<0.0001

−0.082

0.295

<0.0001

−0.104

0.384

<0.0001

0.049a

0.481a

<0.0001a

Vigorous PA (min/day)

            

 Model 1

−0.149

0.022

<0.013

−0.142

0.020

<0.017

−0.120

0.014

<0.043

0.009

0.000

0.875

 Model 2

−0.167

0.091

<0.0001

−0.155

0.057

<0.001

−0.115

0.056

<0.001

−0.013

0.166

<0.0001

 Model 3

−0.152

0.428

<0.0001

−0.148

0.308

<0.001

−0.110

0.390

<0.0001

0.063a

0.388a

<0.0001a

 Model 4

−0.136

0.429

<0.0001

−0.146

0.308

<0.0001

−0.130

0.391

<0.0001

0.042a

0.481a

<0.0001a

MVPA (min/day)

            

 Model 1

−0.183

0.034

<0.002

−0.036

0.020

<0.018

−0.065

0.004

0.273

0.049

0.002

0.142

 Model 2

−0.163

0.090

<0.0001

−0.129

0.049

<0.003

−0.091

0.051

<0.002

0.004

0.166

<0.0001

 Model 3

−0.158

0.430

<0.0001

−0.129

0.303

<0.0001

−0.094

0.386

<0.0001

0.065a

0.389a

<0.00012

 Model 4

−0.160

0.430

<0.0001

−0.138

0.390

<0.0001

−0.140

0.390

<0.0001

0.054a

0.482a

<0.0001a

  1. Model 1 – unadjusted; Model 2 – adjusted for age and gender; Model 3 – Model 2 + FFM; Model 3a for FFM: Model 2 + Sum of skinfolds; Model 4 – Model 3 + sedentary for PA intensities; Model 3 + MVPA for sedentary; Model 4a for FFM – Model 3a + sedentary for PA intensities. MVPA – moderate-to-vigorous physical activity