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Table 3 Linear regression models predicting screen time according to socioeconomic position, children aged 6–10 years

From: Social inequalities in traditional and emerging screen devices among Portuguese children: a cross-sectional study

 Model 1Model 2Model 3
B95% CIR2B95% CIR2B95% CIR2
Television time (mean/day)
 Weekdays−8.76***−10.61; −6.910.020−8.76***−10.61; − 6.910.020− 1.57−4.16; 1.020.047
 Weekend−15.21***− 17.77; − 12.650.031− 15.06***− 17.63; − 12.500.032− 4.06*−7.64; − 0.490.057
Computer time (mean/day)
 Weekdays−2.34***−3.35; − 1.330.005− 2.13***− 3.13; − 1.120.0190.21−1.20; 1.610.031
 Weekend−6.94***− 8.84; − 5.050.012− 6.37***−8.24; − 4.500.047− 1.66−4.27; 0.950.059
Electronic Games time (mean/day)
 Weekdays−1.87***−2.80; −0.940.004−1.73***−2.65; − 0.820.0450.66−0.62; 1.950.055
 Weekend−4.10***−5.99; −2.200.004−3.72***−5.49; −1.950.137−0.24−2.73; 2.260.143
Smartphone time (mean/day)
 Weekdays−2.56***−3.53; −1.600.006−2.41***−3.38; −1.450.0110.06−1.28; 1.410.024
 Weekend−5.87***−7.47; −4.270.012− 5.56***− 7.16; −3.960.019−0.98−3.22; 1.260.034
Tablet time (mean/day)
 Weekdays−0.71−1.88; 0.470.000−0.63−1.81; 0.550.0010.26−1.40; 1.930.005
 Weekend−1.71−3.70; 0.280.000−1.58−3.56; 0.410.008−3.12*−5.94; −0.300.009
Total screen weekdays (mean/day)
 −14.91***−18.80; − 11.020.015−14.95***− 18.84; − 11.070.017−1.50−6.92; 3.910.042
Total screen weekend (mean/day)
 −33.34***−39.46; −27.220.029− 33.63***−39.67; − 27.580.053−13.97**− 22.44; −5.510.073
Total screen 7 days (mean/day)
 −27.81***−32.81; − 22.820.032− 27.97***−32.92; − 23.030.051−9.97**− 16.87; − 3.070.076
  1. Legend. B: Unstandardized beta coefficient; 95% CI: 95% confidence interval; R2: adjusted R-square; socioeconomic position calculated by father education; Model 1: crude, Model 2: adjusted for children’s gender, Model 3: like model 2 plus mother education, parental occupation and urbanization; *p < 0.05, **p < 0.01, ***p < 0.001