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Table 2 Linear regression models predicting screen time according to socioeconomic position, children aged 3–5 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−5.31**−8.31; − 2.310.006− 5.31**− 8.21; − 2.310.0071.40− 2.74; 5.550.019
 Weekend−13.27***−17.37; − 9.240.021− 13.30***− 17.37; − 9.240.028− 3.21−8.80; 2.380.042
Computer time (mean/day)
 Weekdays−2.50***−3.76; − 1.240.008− 2.49***−3.74; − 1.240.021− 0.56− 2.30; 1.180.025
 Weekend−5.80***−7.86; − 3.740.017− 5.78***− 7.82; − 3.740.040−1.77− 4.59; 1.060.048
Electronic Games time (mean/day)
 Weekdays− 2.02***− 3.00; −1.030.009− 2.02***− 2.99; − 1.050.037− 0.71− 2.06; 0.630.041
 Weekend−4.13***−6.00; − 2.260.010−4.10***− 5.92; − 2.280.061−1.90− 4.41; 0.620.065
Smartphone time (mean/day)
 Weekdays−2.69***−4.15; −1.230.007− 2.69***− 4.16; − 1.230.006−0.78− 2.80; 1.250.014
 Weekend−4.15***−6.30; − 2.010.008−4.16***−6.31; − 2.010.008− 0.78− 3.75; 2.180.020
Tablet time (mean/day)
 Weekdays−1.86*− 3.53; −0.190.002− 1.86*−3.53; − 0.200.003− 1.99−4.30; 0.320.002
 Weekend−3.07*−5.70; − 0.430.002− 3.11*− 5.73; − 0.490.011−1.97− 5.60; 1.660.013
Total screen weekdays (mean/day)
 −11.51***−16.80; − 6.220.010− 11.46***−16.74; − 6.170.012−4.26− 11.51; 3.000.020
Total screen weekend (mean/day)
 −24.66***− 32.30; −17.010.023− 24.55***− 32.16; − 16.930.030−12.71*− 23.10; − 2.310.043
Total screen 7 days (mean/day)
 −19.60***−26.03; − 13.170.021− 19.50***− 25.91; − 13.090.027−9.59**−18.33; − 0.850.041
  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