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Table 1 Characteristics of screen time in Chinese boys and girls

From: Correlates of screen time among 8–19-year-old students in China

Variables Boys (n = 510) Girls (n = 553) P valuea
Continuous variable, mean (SD)
Age, years 14.79(2.52) 15.05(2.49) > 0.05
Screen time, hours/week    
  Weekdays 1.86(4.85) 1.33(2.49) < 0.05
  Weekends 7.12(8.23) 5.86(5.32) < 0.005
 TV viewing    
  Weekdays 0.52(1.28) 0.39(0.90) > 0.05
  Weekends 2.11(3.02) 1.91(2.25) > 0.05
 Phone/tablet use    
  Weekdays 0.78(2.34) 0.62(1.67) > 0.05
  Weekends 3.01(4.54) 2.78(3.61) > 0.05
 Computer use    
  Leisure    
   Weekdays 0.28(1.32) 0.14(0.67) < 0.05
   Weekends 1.73(3.11) 0.87(2.17) < 0.001
  Study    
   Weekdays 0.29(2.76) 0.18(0.73) > 0.05
   Weekends 0.27(0.86) 0.30(0.64) > 0.05
Categorical variables, /n (%)
Screen time ≥ 2 h/day 75(14.7) 49(8.9) < 0.005
Grade
 Elementary school 96(18.8) 93(16.8) > 0.05
 Junior school 204(40.0) 201(36.3)
 Senior school 210(41.2) 259(46.8)
Media accessibility
 None screen 33(6.5) 28(5.1) > 0.05
 One screens 125(24.5) 147(26.6)
 Two screens 239(46.9) 285(51.5)
 Three screens 113(22.2) 93(16.8)
Presence of parents/others (P)
 Strongly disagree 132(25.9) 130(23.5) > 0.05
 Disagree 117(22.9) 122(22.1)
 Agree 190(37.3) 210(38.0)
 Strongly agree 71(13.9) 91(16.5)
TV in bedroom 83(16.3) 87(15.7) > 0.05
Computer 132(25.9) 148(26.8) > 0.05
Phone/tablet 373(73.1) 428(77.4) > 0.05
Presence of P while watching TV
 Strongly disagree 111(21.8) 86(15.6) < 0.05
 Disagree 123(24.1) 125(22.6)
 Agree 156(30.6) 192(34.7)
 Strongly agree 120(23.5) 150(27.1)
Presence of P while PC use
 Strongly disagree 178(34.9) 201(36.3) > 0.05
 Disagree 179(35.1) 183(33.1)
 Agree 87(17.1) 109(19.7)
 Strongly agree 66(12.9) 60(10.8)
  1. aT-test for continuous variables and Chi-squared test for categorical variables between boys and girls, respectively.
  2. SD standard deviation; TV, television; P, parents/others; PC, personal computer