Physical Activity, Sedentary Time, and Diet as Mediators of the Association Between TV Time and BMI in Youth.
Am J Health Promot
; 35(5): 613-623, 2021 06.
Article
in En
| MEDLINE
| ID: mdl-33423502
ABSTRACT
PURPOSE:
This study examined dietary indicators, sedentary time, and physical activity as potential mediators of the association between TV time and BMIz in youth.DESIGN:
Cross-sectional study in 2 independent samples of youth.SETTING:
Data collection occurred by mail and telephone for adolescents and either at home or in medical settings for children. SAMPLE 928 youth ages 12-16 and 756 youth ages 6-12 and a parent.MEASURES:
TV time, snacking/eating while watching TV, and a 3-day dietary recall were assessed via child/parent report. Physical activity and sedentary time were assessed by accelerometer wear.ANALYSIS:
Direct and indirect associations (through 8 diet and activity variables) of TV time with BMIz were tested in boys and girls in each sample.RESULTS:
TV time had a positive association with BMIz in 6-12 year old boys and girls. Direct associations emerged between TV time and the diet/activity variables, and between diet/activity variables and BMIz. Snacking/eating while watching TV had a significant positive association with BMIz in younger boys and mediated the association between TV time and BMIz (ß = .06, p = .019; 25% attenuation).CONCLUSIONS:
Snacking/eating while watching TV may be a possible reason TV time is consistently associated with obesity in youth. Targeting reductions in TV time and associated snacking could improve health impacts.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Television
/
Sedentary Behavior
Type of study:
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limits:
Adolescent
/
Child
/
Female
/
Humans
/
Male
Language:
En
Journal:
Am J Health Promot
Journal subject:
SAUDE PUBLICA
Year:
2021
Document type:
Article
Affiliation country: