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Table 2 Bowker's test of symmetry for percentage of change in daily TV and VG time between ages 5, 8, 11, and 13

From: Tracking of TV and video gaming during childhood: Iowa Bone Development Study

   Age 5-8 Age 5-11 Age 5-13 Age 8-11 Age 8-13 Age 11-13
TV Viewing        
   Boys Increase 23 36 36 43* 43* 34
  Decrease 41 38 37 28 24 32
   Girls Increase 22 27 32 35 37 35
  Decrease 41* 39 41 29 33 38
Video Gaming        
   Boys Increase 33** 54*** 61*** 45*** 53*** 39
  Decrease 10 8 8 15 13 35
   Girls Increase 9 27** 31*** 26** 32*** 28*
  Decrease 7 8 7 5 9 17
  1. * p < 0.05; ** p < 0.01; *** p < 0.001.
  2. Boys (age 5: n = 205; age 8: n = 193; age 11: n = 171; age 13: n = 168.)
  3. Girls (age 5: n = 229; age 8: n = 222; age 11: n = 211; age 13: n = 189.)