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Decreasing Television Viewing for Prevention and Control of Obesity. Beverly S. Kingsley PhD, MPH Barbara Polhamus PhD, MPH, RD Bettylou Sherry PhD, RD CDC State Orientation Meeting Crowne Plaza November 12, 2008. Session Outline. Background / Descriptive Epidemiology

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Decreasing television viewing for prevention and control of obesity

Decreasing Television Viewing for Prevention and Control of Obesity

Beverly S. Kingsley PhD, MPH

Barbara Polhamus PhD, MPH, RD

Bettylou Sherry PhD, RD

CDC State Orientation Meeting

Crowne Plaza

November 12, 2008

Session outline
Session Outline Obesity

  • Background / Descriptive Epidemiology

  • Health Outcomes

  • Intervention Strategies

  • State and Local Policies/ Programs

  • Barriers

  • Tools / Resources and Contacts

  • Discussion

Background Obesity

  • TV/Screen Time

    • Children and Adolescents

    • TV Viewing

    • Consideration of total screen time

(0-1) Obesity






Prevalence of Obesity by Hours of TV per DayNHES Youth Aged 12-17 in 1967-70 and NLSY Youth Aged 10-15 in 1990

TV Hours Per Day (Youth Report)

Background Obesity

  • Expert Panel highlights growing concern about contribution of media use to childhood obesity*

    • TV viewing positively associated with obesity (Dietz and Gortmaker,1985)

    • Decreasing TV viewing may be an effective strategy for preventing and controlling obesity

      ( Robinson T 1999; Gortmaker S et. al., 1999)

*Source: Jordan A and Robinson T. The Annals of the American Academy of Political and Social Science, 2008

Healthy people 2010
Healthy People 2010 Obesity

  • Objective 22-11 - Increase the proportion of adolescents who view television 2 or fewer hours on a school day.

  • Target: 75 percent.

  • Baseline: 57 percent of students in grades 9 through 12 viewed television 2 or fewer hours per school day in 1999.

  • Data source: Youth Risk Behavior Surveillance System (YRBSS), CDC, NCCDPHP.

Daily television viewing by children and youth by hours
Daily Television Viewing Obesityby Children and Youth by Hours

Kids and Media at the New Millennium, Kaiser Family Foundation, 1999

Patterns of tv and media use
Patterns of TV and Media Use Obesity

  • 61% children < 2 use screen media; 43% watch TV every day

  • 41% 2-3 yr olds, 43% 4-6 yr olds use screen media >2 hrs/day

  • Children 8-18 watch average 3 hrs/day

  • Average family owns 4 TV sets

  • African- American/Hispanic kids watch>TV white kids

  • Children < 6, low SES households watch more TV

Source: Jordan A and Robinson T 2008; Kaiser Family Foundation 2006.

Health outcomes associated with tv viewing
Health Outcomes Associated with TV Viewing Obesity

  • Overweight and obesity

  • Negative influence on food choice

  • Increase in food intake during TV time

  • Sedentary Behavior

  • Replacement for Physical Activity

Overweight and obesity
Overweight and Obesity Obesity

  • Cross-sectional studies

    Dose-response association of TV viewing and body fat percentage and overweight

  • Prospective studies

    TV viewing risk factor for subsequent weight gain and overweight higher BMI (as well as lower cardiorespiratory fitness, increased cigarette smoking)

  • Randomized Controlled Trials

    Reduced TV Viewing/other screen media results in decreased BMI, waist circumference, triceps skinfold thicknesses in elementary school children; decreased overweight in middle school girls; weight loss in overweight 8-12 yr old children

Sources: Anderson 1998;Hernandez et al 1999; Gortmaker 1996; Hancox and Poulton 2006; Dietz and Gortmaker; Hancox et al 2004;VIner and Cole 2005; Gortmaker 1999; Epstein et al 1995, 2000.

Overweight and obesity tv advertising
Overweight and Obesity ObesityTV Advertising

  • 1990 estimates: children view 40,000 TV commercials/year ~50% for food and beverages, possibly decreasing

  • Content analysis research indicates nutritional characteristics of advertised food generally high calorie and low nutrient food and beverage

  • Strong evidence that exposure to television advertising associated with adiposity in children 2-11 and teens 12-18

    BUT Evidence for causal relationship is not conclusive

Source: Food Marketing to Children and Youth. Institute of Medicine 2006.

Negative influence on food choice
Negative Influence on Food Choice Obesity

TV advertising influences food and beverage choices

  • TV is largest media carrier of food and beverage marketing to children and adolescents

Source: Food and Marketing to Children and Youth. Institute of Medicine 2006

Negative influence on food choice1
Negative Influence on Food Choice Obesity

Effects on 2-11 year olds

  • Strong evidence

    • Food and beverage preferences

    • Food and beverage purchase requests

    • Short-term consumption

  • Moderate evidence

    • Food and beverage beliefs

    • Usual dietary intake (2-5 years)

Source: Food and Marketing to Children and Youth. Institute of Medicine 2006; Miller and Taveras 2008

Negative influence on food choice and increase in food intake
Negative Influence on Food Choice and Increase in Food Intake

  • For each incremental hour of TV viewing, Sugar Sweetened Beverage consumption increased by 0.06 serving

  • Children watching TV > 2 hr/day more likely to consume energy-dense, low-fiber, high-fat diet

  • Children who eat while watching TV more likely to become obese

Sources: Miller and Taveras 2008;Johnson et al 2008; Matheson et al. 2004

Sedentary behavior
Sedentary Behavior Intake

  • Multiple studies provide evidence for association between TV viewing and sedentary behavior

    • suggests TV viewing weakly related to physical activity

    • sedentary behavior effects on children’s adiposity independent of physical activity.

  • TV in bedroom associated with unhealthy eating and exercise habits in teens

  • Sources: Jordan and Robinson 2008; Barr-Anderson et al., 2008

    Tv viewing as replacement for physical activity
    TV Viewing as Replacement for Physical Activity Intake

    • Research suggests TV viewing and related sedentary behavior can compete with physical activity, and lower energy expenditure.


    • Reducing television viewing and computer use may have an important role in preventing obesity and lowering BMI in young children, and these changes may be more related to changes in energy intake than to changes in physical activity.

    Source:Epstein et al, 2008

    Proposed mechanisms for association between tv and obesity
    Proposed Mechanisms for Association Between TV and Obesity Intake

    • Reduction of Resting Metabolic Rate

      • Treuth et al 2000

  • Displacement of physical activity

    • Williams and Handford 1986; Lowry et. al., 2002

  • Consumption of more energy dense foods during meals

    • Coon and Tucker 2002; Miller and Taveras 2008.

  • Exposure to marketing of high energy dense food

    • Institute of Medicine 2006.

  • Evidence base interventions to reduce tv viewing
    Evidence Base Intake Interventions to Reduce TV Viewing

    • Few published reports on intervention to reduce TV viewing

    • Some that have shown success:

      • Curricula for child care settings

      • Elementary and middle school intervention curricula

      • Clinic based interventions

      • After-school dance program

      • Home delivered interventions

    Source: DNPAO TA Manual

    Intervention settings to reduce tv viewing
    Intervention Settings Intake to Reduce TV Viewing

    • Medical/Health Care

    • School/Childcare

    • Worksite

    • Community

    Medical health care
    Medical/ Health Care Intake

    • Provide training for health care professionals to counsel on reducing children’s media use

      • Because media use accounts for such a substantial part of most children’s lives, panel suggested training on children and media should be included in curricula at all stages, and made a required content area for child health professional accreditation, certification, and continuing education

    Source: Rich and Bar-on, 2001

    Medical health care evidence of effective interventions
    Medical / Health Care Intake Evidence of Effective Interventions

    Randomized controlled studies

    • Reducing sedentary behaviors (TV/media)

      as effective as increasing physical activity to decrease obesity (Epstein et al 2000)

    • Pilot/Feasibility

      behavioral intervention included electronic television time manager: marginally effective

      (Ford et al 2002)

    • TV Budget

      reduction in TV viewing plus computer use associated with significant decreases in BMI z- score (Epstein et al 2008)

    Medical health care1
    Medical/Health Care Intake

    • “Keep Me Healthy”

      Tool kit developed by the Maine Youth Overweight Collaborative. Practical support and guidance to health care practices, organizations and individuals across the state to help improve care and outcomes for overweight and obese

    • Children, Television, and Weight Status: Summary and Recommendations from Expert Panel

      Provide training for health care professionals on reducing children’s media use (Jordan and Robinson 2008)

    Medical health care2
    Medical/ Health Care Intake

    • AAP Recommendations for pediatricians and other health care professionals

      • Remain knowledgeable about the effects of television

      • Use the AAP Media History Form to help parents recognize the extent of their children’s media consumption

      • Work with local schools to implement media education programs

      • Serve as good role models

      • Become involved in AAP’s Media Resource Team

      • Ensure appropriate entertainment options available for hospitalized children

      • Support Children’s Television Act of 1990 and 1996 rules

      • Monitor television ratings system

    Schools childcare evidence of interventions to reduce tv viewing
    Schools/Childcare Intake Evidence of Interventions to Reduce TV Viewing


    Brocodile the Crocodile

    Elementary schools


    Middle Schools

    Planet Health

    Sources: Dennison et al., 2004; Robinson 1999; Gortmaker et al., 1999

    Preschool brocodile the crocodile
    Preschool : Brocodile the Crocodile Intake

    • Preschool and daycare in upstate NY: 16 sites

    • Children aged 2.6 – 5.5 years old

    • 1hr/week interactive session to reduce TV ( 7 sessions TV focused/39 total health promotion curriculum)

    • Intervention reduced TV/video watching by 3.1 hr/wk vs. increased 1.6 hr/wk in non-intervention group

    • Percentage of children watching TV/videos more than 2h/d decreased significantly from 33% to 18% ( compared with increase in non intervention)

    • Reduction in obesity not significant.

    Source: Dennison et al. 2004

    Elementary school intervention smart
    Elementary School Intervention Intake SMART

    • Randomized controlled school-based trial

    • 18 lesson, 6 month classroom curriculum to reduce TV, video tape/video game use.

    • TV monitor: monitors and budgets TV time/pp

    • Statistically significant reduction in BMI ( -.45kg/m2) TSFT, waist circumference, waist-to-hip ratio

    • Accompanied by reduction in TV viewing: decreased by 5.53 hrs TV, and -1.5 hr of video tape use, -2.5 hr video games

    • 1st experimental study demonstrates a direct association between television, video tape/video game use

    Source: Robinson 1999

    Middle school intervention planet health
    Middle School Intervention Intake Planet Health

    • Randomized controlled field trial

    • Evaluate impact of school-based health behavior intervention; ethnically diverse grades 6-7

    • 2 school years sessions included within existing curricula

    • Focus: decrease TV, high fat foods; increasing fruits/veggies and physical activity

    • Increase in remission of obesity (OR 2.16, girls).

    • TV+video reduced in boys and girls (0.40, 0.58/d).

    • Every hour TV reduction (girls) independently associated w/reduction obesity prevalence OR 0.85

    Gortmaker et al. 1999

    Intervention settings worksite
    Intervention Settings Intake Worksite


    Community Intake

    • Family based intervention: Stanford GEMS Pilot Study: reduced BMI -.32 and reduced TV/video use – 4.96 hrs/wk

    • SWITCH: community, school, family based intervention to modify behaviors related to childhood obesity (study protocol only to date)

    Robinson et al. 2003; Eisenman 2008

    Examples of intervention activities to decrease tv viewing
    Examples of Intervention Activities to Decrease TV Viewing Intake

    • Reduce TV viewing time – sponsor a “Turn off TV Night” in community; offer alternatives

    • Partner with health care providers to encourage activity instead of TV viewing.

    • Provide information to parents for reducing TV viewing time of children.

    • Provide parenting programs addressing parental monitoring/setting of rules

    Examples of intervention activities to decrease tv viewing cont d
    Examples of Intervention Activities to Decrease TV Viewing (cont’d)

    • Provide safe and engaging activities for children instead of watching TV.

    • Use multiple channels for interventions,, 7.

    • Conduct community-wide healthy eating and physical activity special events, regular programming, and media campaigns.

    • Encourage mindful viewing

    U s state regulations for obesity prevention in child care1
    U.S. State Regulations for Obesity Prevention in Child Care (cont’d)

    • Child Care Centers

      • 17 states regulate screen time (AL, AK,AZ, CO, DE, FL, GA, IL, IN, MN, MS, NM, SC, TN, TX, VT, WV)

    • Family Child Care Homes

      • 15 states regulate screen time (AK, CO, DE, MS, MT, OR, PA, RI, SD, TN, UT, VT, VA, WA, WV)

    • Require parental permission to use TV during child care hours (DE, CO)

    Benjamin SE et al. BMC Public Health. 2008:8:188

    Tv interventions reported by cdc funded states
    TV Interventions Reported by CDC Funded States

    • 155 interventions reported, 35 contain component to reduce TV viewing (most at individual level)

    • Intervention described by states included:

      • We Can! (KY)

      • Statewide TV-Turnoff Week (NY)

      • Health and Fitness by Age 5 Program (NY)

      • WA Active Bodies Active Minds (WAABAM)

    Source: Progress Monitoring Report January 1-June 30, 2007

    Barriers to decreasing tv viewing
    Barriers to Decreasing TV Viewing States

    • TV viewing is ubiquitous

    • TV viewing pleasurable/habitual

    • TV viewing not seen as harmful

      • societal norm shift needed

  • Alternative activities require additional time and effort by parents

  • Parents would have to model reduced TV viewing

  • Limited evidence base for effective interventions to decrease TV viewing

  • Tools and resources
    Tools and Resources States

    • Guidance Document

    • RE-AIM

    • AAP Guidelines and Recommendations;107/2/423

    • Existing Interventions

    • Report of the Expert Panel

    • DNPAO

    Tv guidance document
    TV Guidance Document States

    • TV Guidance Document Focus:

      • Children and Adolescents

      • TV Viewing

      • Consideration of total screen time

    Dnpao guidance documents
    DNPAO Guidance Documents States

    • Resources for States

    • Produced and disseminated “Guide to Breastfeeding Interventions”

    • Guidance Documents in progress for DNPAO’s 5 other target behaviors

    Use of re aim to select and evaluate interventions
    Use of RE-AIM to Select and Evaluate Interventions States

    • Systematic way for researchers, practitioners, and policy makers to evaluate health behavior interventions

    • Use to estimate the potential impact of interventions on public health

      Translatability and public health impact best evaluated by examining:

      Reach into the target population

      Efficacy or effectiveness

      Adoption by target settings/institutions

      Implementation: consistency of delivery of intervention

      Maintenance of intervention effects in individuals and populationsover time.

    2001 aap guidelines for tv viewing
    2001 AAP Guidelines for TV Viewing States

    • Limit children’s total media time to no more than 1-2 hours quality programming per day

    • Discourage television viewing for children younger than 2 years

    • Remove television sets from children’s bedrooms

      Source: AAP, Pediatrics 2001

    2001 aap guidelines for tv viewing cont d
    2001 AAP Guidelines for TV Viewing (cont’d) States

    • Monitor shows children and adolescents viewing

    • View television programs with children/discuss content

    • Use controversial programming to initiate discussions

    • Use VCR wisely for educational programming

    • Support efforts to establish comprehensive media-education programs in schools

    • Encourage alternative entertainment for children, e.g. reading, athletics, hobbies, creative play.

    Source: AAP Pediatrics 2001

    Cdc s division of nutrition physical activity and obesity
    CDC’s Division of Nutrition, Physical Activity and Obesity

    • Collaborate with state, local and other partners

    • Evaluate promising environmental and policy approaches

      To reduce TV Viewing and other screen time behaviors to prevent and decrease childhood obesity

    Contact information
    Contact Information

    Division of Nutrition, Physical Activity and Obesity

    State Project Officers


    • Is the content of the guide appropriate?

      Does it meet you program planning needs?

      If not, what is missing?

    • What do you need most to ensure the effectiveness of your efforts to decrease TV viewing?

    • How can CDC and State Partners best work together to advance this area?