Screen time and risk behaviors in 10- to 16-year-old Canadian youth.

To examine television, computer, and video game use as possible determinants of multiple risk behaviors (MRB) among Canadian youth. Results are based on the Canadian 2005/06 Health Behaviour in School-Aged Children Survey. This survey included a representative cross-sectional sample of 8215 youth in grades 6-10, and a 1-year longitudinal sample of 1424 youth in grades 9-10. Total hours per week of television, video games, and computer use were calculated and participants were grouped into quartiles. Six risk behavior variables (smoking, drunkenness, non-use of seatbelts, cannabis use, illicit drug use, non-use of condoms) were combined to form a MRB score. Ordinal and repeated measure logistic regression models were used to examine associations between screen time and MRB variables. High computer use (top quartile) was associated with approximately a 50% increased engagement of MRB in both samples. High television use was also associated with modestly increased engagement in MRB in the cross-sectional sample. High computer use was the screen time behavior that was mostly strongly and consistently associated with engagement in MRB. Future research is needed to understand the relationship between specific screen time behaviors and adolescent health to help strengthen current screen time guidelines for youth.

Carson V ，Pickett W ，Janssen I 《-》

Influence of limit-setting and participation in physical activity on youth screen time.

Carlson SA ，Fulton JE ，Lee SM ，Foley JT ，Heitzler C ，Huhman M ... -  《-》

TVs in the bedrooms of children: does it impact health and behavior?

To (1) determine socio-demographic characteristics associated with a TV in the bedroom (BTV) and (2) examine relationship of BTV, independent of total viewing time, with social and behavioral characteristics. Children 6-17 years from the 2007 US National Survey of Children's Health were included (n=48,687). BTV, daily TV viewing time, demographic, behavioral and social outcomes (community involvement, social skills, health habits and status, and family) were examined using logistic regression, and adjusted for total viewing time. Overall prevalence of BTV was 49.3% in American children. Older age, non-Hispanic Black (71.3%), Hispanics (56.3%), higher level of poverty (>56.2%), non two-parent biological family structure (>62.6%), Midwest (47.1%), Northeast (46.7%), South Atlantic (56.4%) and South Central (59.8%) region of the country were associated with higher odds of BTV. Female gender (52.7%) and residence in Alaska (33.0%) were associated with lower prevalence of BTV. BTV was associated with higher prevalence of exhibiting problematic social behaviors (29%) and overweight status (44%). BTV was significantly associated with lower prevalence of regular family meals (13%), engagement in school (16%), participation in extracurricular activities (31%), regularly sleeping enough (20%), and participation in community service (25%) after adjustment for total viewing time. BTV appears associated with more social and behavioral indices than previously reported, in addition to total viewing time.

Sisson SB ，Broyles ST ，Newton RL Jr ，Baker BL ，Chernausek SD ... -  《-》

Neighborhood disorder and screen time among 10-16 year old Canadian youth: a cross-sectional study.

Carson V ，Janssen I 《-》

Modifiable characteristics associated with sedentary behaviours among youth.

Leatherdale ST ，Wong SL 《-》