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Developmental trajectories of physical activity and television viewing during adolescence among girls: National Growth and Health Cohort Study.

Kwon S, Lee J, Carnethon MR - BMC Public Health (2015)

Bottom Line: A significantly lower proportion of Black girls had high PA levels at baseline and maintained their baseline PA than White girls.However, a lower proportion of Black girls followed the maintenance patterns than White girls.The behavioral development of PA and TV viewing may be intertwined among adolescent girls.

View Article: PubMed Central - PubMed

Affiliation: Department of Pediatrics, Stanley Manne Children's Research Institute, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University, 225 E Chicago Ave. Box 157, Chicago, IL, 60611, USA. skwon@luriechildrens.org.

ABSTRACT

Background: Analytic methodology for investigating physical activity patterns over time has been limited. The aim of this study was to demonstrate the group-based trajectory analysis process for identifying developmental physical activity (PA) and television (TV) viewing trajectories and the risk factor of PA trajectories, and for examining a relationship between PA and TV viewing trajectories among adolescent girls.

Methods: Secondary analysis was conducted using the National Growth and Health Study (NGHS) dataset. The NGHS administered the Habitual Activity Questionnaire and TV viewing questionnaire to White and Black girls at age 10, 12, 14, 16, 17, 18, and 19 years. Group-based trajectory analyses were conducted to identify distinct PA trajectories. Race was chosen to present an example of the risk factor analysis and was added as a predictor in the trajectory model. Dual-trajectory analysis was conducted to estimate probabilities of TV viewing trajectory groups conditional on the PA trajectory groups.

Results: A total of 2,155 girls (52% Black) were included in the data analysis. We identified four PA trajectories: substantially decreasing from high PA (PA group 1, 9.4%), maintaining moderate PA (PA group 2, 31.6%), maintaining high PA (PA group 3, 5.8%), and decreasing from moderate PA (PA group 4, 53.2%). A significantly lower proportion of Black girls had high PA levels at baseline and maintained their baseline PA than White girls. Most girls who were classified as maintaining high PA (88%) were also classified as decreasing TV viewing.

Conclusions: A group-based trajectory approach provides new insights about the patterns of maintaining moderate or high levels of PA that exist among adolescent girls. However, a lower proportion of Black girls followed the maintenance patterns than White girls. The behavioral development of PA and TV viewing may be intertwined among adolescent girls.

Show MeSH
Mean Habitual Activity Questionnaire scores and 95 % confidence intervals by PA trajectory classes. Dots indicate actual mean Habitual Activity Questionnaire (HAQ) scores, a solid line indicates estimated mean HAQ scores, and a dotted line indicates 95 % confidence intervals of estimated mean HAQ scores. MET, metabolic equivalent
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Fig1: Mean Habitual Activity Questionnaire scores and 95 % confidence intervals by PA trajectory classes. Dots indicate actual mean Habitual Activity Questionnaire (HAQ) scores, a solid line indicates estimated mean HAQ scores, and a dotted line indicates 95 % confidence intervals of estimated mean HAQ scores. MET, metabolic equivalent

Mentions: Based on the graphical presentation (Fig. 1), the four groups were labeled as ‘substantially decreasing from high PA’ (PA group 1, 9.4 %), ‘maintaining moderate PA’ (PA group 2, 31.6 %), ‘maintaining high PA’ (PA group 3, 5.8 %), and ‘decreasing from moderate PA’ (PA group 4, 53.2 %). PA groups 1 and 4 (62.6 %) showed a declining pattern while PA groups 2 and 3 (37.4 %) showed a maintaining pattern. PA groups 1 and 3 (15.2 %) had high PA levels at baseline, and PA groups 2 and 4 (84.8 %) had moderate PA levels at baseline. Among Whites, 8 % belonged to PA group 1, 43 % to group 2, 10 % to group 3, and 39 % to group 4. Among Blacks, 8 % belonged to PA group 1, 20 % to group 2, 1 % to group 3, and 71 % to group 4. Black girls were less likely to be in the maintaining high PA group than White girls (P-value < 0.05).Fig. 1


Developmental trajectories of physical activity and television viewing during adolescence among girls: National Growth and Health Cohort Study.

Kwon S, Lee J, Carnethon MR - BMC Public Health (2015)

Mean Habitual Activity Questionnaire scores and 95 % confidence intervals by PA trajectory classes. Dots indicate actual mean Habitual Activity Questionnaire (HAQ) scores, a solid line indicates estimated mean HAQ scores, and a dotted line indicates 95 % confidence intervals of estimated mean HAQ scores. MET, metabolic equivalent
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4502939&req=5

Fig1: Mean Habitual Activity Questionnaire scores and 95 % confidence intervals by PA trajectory classes. Dots indicate actual mean Habitual Activity Questionnaire (HAQ) scores, a solid line indicates estimated mean HAQ scores, and a dotted line indicates 95 % confidence intervals of estimated mean HAQ scores. MET, metabolic equivalent
Mentions: Based on the graphical presentation (Fig. 1), the four groups were labeled as ‘substantially decreasing from high PA’ (PA group 1, 9.4 %), ‘maintaining moderate PA’ (PA group 2, 31.6 %), ‘maintaining high PA’ (PA group 3, 5.8 %), and ‘decreasing from moderate PA’ (PA group 4, 53.2 %). PA groups 1 and 4 (62.6 %) showed a declining pattern while PA groups 2 and 3 (37.4 %) showed a maintaining pattern. PA groups 1 and 3 (15.2 %) had high PA levels at baseline, and PA groups 2 and 4 (84.8 %) had moderate PA levels at baseline. Among Whites, 8 % belonged to PA group 1, 43 % to group 2, 10 % to group 3, and 39 % to group 4. Among Blacks, 8 % belonged to PA group 1, 20 % to group 2, 1 % to group 3, and 71 % to group 4. Black girls were less likely to be in the maintaining high PA group than White girls (P-value < 0.05).Fig. 1

Bottom Line: A significantly lower proportion of Black girls had high PA levels at baseline and maintained their baseline PA than White girls.However, a lower proportion of Black girls followed the maintenance patterns than White girls.The behavioral development of PA and TV viewing may be intertwined among adolescent girls.

View Article: PubMed Central - PubMed

Affiliation: Department of Pediatrics, Stanley Manne Children's Research Institute, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University, 225 E Chicago Ave. Box 157, Chicago, IL, 60611, USA. skwon@luriechildrens.org.

ABSTRACT

Background: Analytic methodology for investigating physical activity patterns over time has been limited. The aim of this study was to demonstrate the group-based trajectory analysis process for identifying developmental physical activity (PA) and television (TV) viewing trajectories and the risk factor of PA trajectories, and for examining a relationship between PA and TV viewing trajectories among adolescent girls.

Methods: Secondary analysis was conducted using the National Growth and Health Study (NGHS) dataset. The NGHS administered the Habitual Activity Questionnaire and TV viewing questionnaire to White and Black girls at age 10, 12, 14, 16, 17, 18, and 19 years. Group-based trajectory analyses were conducted to identify distinct PA trajectories. Race was chosen to present an example of the risk factor analysis and was added as a predictor in the trajectory model. Dual-trajectory analysis was conducted to estimate probabilities of TV viewing trajectory groups conditional on the PA trajectory groups.

Results: A total of 2,155 girls (52% Black) were included in the data analysis. We identified four PA trajectories: substantially decreasing from high PA (PA group 1, 9.4%), maintaining moderate PA (PA group 2, 31.6%), maintaining high PA (PA group 3, 5.8%), and decreasing from moderate PA (PA group 4, 53.2%). A significantly lower proportion of Black girls had high PA levels at baseline and maintained their baseline PA than White girls. Most girls who were classified as maintaining high PA (88%) were also classified as decreasing TV viewing.

Conclusions: A group-based trajectory approach provides new insights about the patterns of maintaining moderate or high levels of PA that exist among adolescent girls. However, a lower proportion of Black girls followed the maintenance patterns than White girls. The behavioral development of PA and TV viewing may be intertwined among adolescent girls.

Show MeSH