Table 5

Physical activity and screen time odds ratios for 5-year incident obesity (Wave II to III)a

MVPAb (bouts/wk – Wave II)

Screen Timec

1

2

3

5

6


(hrs/wk – Wave II)

MALES [OR (95% CI)]

4

0.78 (0.61, 0.99)*

0.77 (0.59, 1.00)

0.77 (0.57, 1.03)

0.76 (0.52, 1.09)

0.75 (0.50, 1.14)

7

0.79 (0.63, 0.99)*

0.79 (0.62, 1.01)

0.78 (0.60, 1.03)

0.77 (0.54, 1.10)

0.77 (0.52, 1.14)

13

0.83 (0.69, 0.99)*

0.82 (0.67, 1.01)

0.82 (0.64, 1.03)

0.81 (0.58, 1.11)

0.80 (0.55, 1.16)

25

0.90 (0.81, 1.00)

0.89 (0.79, 1.02)

0.89 (0.75, 1.05)

0.88 (0.67, 1.14)

0.87 (0.63, 1.20)

40

1.00d

0.99 (0.94, 1.05)

0.99 (0.88, 1.10)

0.97 (0.78, 1.22)

0.97 (0.73, 1.28)

FEMALES [OR (95% CI)]

4

0.58 (0.43, 0.80)*

0.64 (0.46, 0.89)*

0.66 (0.46, 0.95)*

0.61 (0.42, 0.91)*

0.55 (0.36, 0.84)*

7

0.61 (0.46, 0.81)*

0.66 (0.49, 0.90)*

0.69 (0.49, 0.97)*

0.64 (0.44, 0.93)*

0.58 (0.39, 0.86)*

13

0.67 (0.53, 0.84)*

0.73 (0.56, 0.94)*

0.75 (0.56, 1.01)

0.70 (0.50, 0.99)

0.63 (0.44, 0.91)*

25

0.80 (0.70, 0.91)*

0.87 (0.73, 1.03)

0.90 (0.72, 1.13)

0.84 (0.63, 1.12)

0.75 (0.54, 1.05)

40

1.00d

1.09 (0.98, 1.22)

1.13 (0.94, 1.36)

1.05 (0.81, 1.37)

0.95 (0.69, 1.30)


* OR is significantly different than 1.0 (p < 0.05).

a National Longitudinal Study of Adolescent Health. Odds ratios and 95% confidence intervals from multivariate gender-specific logistic regression models (shown in Table 4; nmales = 4,329, nfemales = 3,823) predicting incident obesity from Wave II to Wave III, and accounting for sampling strategy and including all variables in the table as well as age at wave III, household income (parental), highest parental education, race, smoking status at Wave III (females only), and season at Wave III (males only).

bSelected MVPA (moderate to vigorous physical activity) levels correspond to the 10th, 25th, 50th, 75th, and 90th percentiles for males and females combined during Wave II.

c Selected Screen Time (television and video viewing) levels correspond to the 10th, 25th, 50th, 75th, and 90th percentiles for males and females combined during Wave II.

d Reference profile is 1 bout MVPA, 40 hours Screen Time. All other variables are held constant.

Boone et al. International Journal of Behavioral Nutrition and Physical Activity 2007 4:26   doi:10.1186/1479-5868-4-26

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