Supplemental Data


Abstract
Full Text
Television Viewing and Aggressive Behavior During Adolescence and Adulthood
Jeffrey G. Johnson, Patricia Cohen, Elizabeth M. Smailes, Stephanie Kasen, and Judith S. Brook

Supplementary Material


Supplemental Table 1. Associations between covariates and television viewing at mean age 16 (N = 707).
% (n) of Youths Who Watched Greate Than or Equal to 3 Hours of Television at Mean Age 14% (n) of Youths For Whom Aggressive Acts Were Reported at Mean Age 16 or 22
Covariate:Covariate Absent % (n)Covariate Present % (n)Greek Letter Chi2(df=2)dCovariate Absent % (n)Covariate Present % (n)Greek Letter Chi2(df=1)
Aggressive Peers
During Childhood
32.0% (207 of 646)42.6% (26 of 61)4.9921.4% (138 of 646)34.4% (21 of 61)5.46a
Childhood Neglect30.8% (186 of 604)45.6% (47 of 103)12.29c20.5% (124 of 604)34.0% (35 of 103)9.13c
Frequent School Violence
During Childhood
31.1% (170 of 546)39.1% (63 of 161)4.4120.3% (111 of 546)29.8% (48 of 161)6.42a
Growing up in an
Unsafe Neighborhood
30.1% (173 or 574)45.1% (60 of 133)12.22b19.9% (114 of 574)33.8% (45 of 133)12.10c
Harsh Punishment During
Childhood or Adolescence
31.9% (200 of 626)40.7% (33 of 81)3.6820.8% (130 of 626)35.8 % (29 of 81)9.30c
Low Family Income30.7% (197 of 642)55.4% (36 of 65)17.44c25.9% (166 of 642)49.2% (32 of 65)17.41c
Low Verbal Intelligence29.3% (166 of 566)47.5% (67 of 141)16.94c21.7% (123 of 561)25.5% (36 of 141)0.94
Low Parental Education27.3% (141 of 517)48.4% (92 of 190)28.85c18.4% (95 of 517)33.7% (64 of 190)18.68c
Male Sex34.0% (118 of 347)31.9% (115 of 360)0.3511.0% (38 of 347)33.6% (121 of 360)52.05c
Psychiatric Disorder
During Adolescence
26.5% (107 of 404)41.6% (126 of 303)18.33c14.6% (59 of 404)33.0% (100 of 303)33.63c
aP < 0.05 bP < 0.01 cP < 0.005 d The chi-square statistic with 2 degrees of freedom is based on the association between the covariate and the 3 levels of television viewing at mean age 14:: < 1 hour per day; 1-3 hours per day; and Greate Than or Equal to 3 hours per day.