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Table 3 Comparison between those included in the CoDA analytic sample and those excluded from the CoDA analytic sample (due to 0 min per day of any form of screen time)

From: Longitudinal associations of screen time, physical activity, and sleep duration with body mass index in U.S. youth

 

Included

(n = 5,164)

Excluded

(n = 5,380)

P

Age, Years

10.0 (0.03)

9.9 (0.02)

< .0001

Female

2,542 (50.4%)

2,516 (47.4%)

.0404

Race/Ethnicity

 Asian

110 (3.7%)

117 (3.7%)

 

 Black

827 (13.9%)

545 (9.3%)

 

 Hispanic

1,011 (22.9%)

1,080 (23.6%)

.0011

 Other/Multiracial

549 (7.2%)

550 (6.3%)

 

 White

2,667 (52.3%)

3,088 (57.1%)

 

Income-to-Needs Ratio

  ≤ 0.99

634 (15.1%)

630 (15.4%)

 

 1.00–1.99

756 (19.1%)

738 (18.2%)

 

 2.00–3.99

1,238 (26.4%)

1,188 (24.2%)

.0941

  ≥ 4.00

2,041 (28.8%)

2,347 (32.0%)

 

 Not reported

495 (10.6%)

477 (10.2%)

 

Internalizing Symptoms

5.1 (0.2)

5.3 (0.2)

.1272

Streaming (min/day)

151.9 (4.8)

127.5 (5.3)

< .0001

Gaming (min/day)

72.7 (2.1)

50.8 (2.2)

< .0001

Socializing (min/day)

46.8 (2.0)

6.2 (0.7)

< .0001

Physical Activity (min/day)

29.7 (0.5)

29.2 (0.8)

.3753

Sleep (min/day)

534.9 (3.4)

541.4 (3.5)

.0006

Baseline BMI-z Score

0.50 (0.05)

0.41 (0.06)

.0067

Follow-up BMI-z Score

0.57 (0.05)

0.47 (0.05)

.0028

  1. Continuous data presented as weighted mean (SE), discrete data presented as n (weighted %). P-values derived from weighted independent samples t-test or weighted chi-square tests. Those excluded from the CoDA analytic sample due to 0 min/day screen time were included in the isotemporal substitution analytic sample