Table 2.

Bivariate associations with recreational screen based sedentary behavior

	≥4 Hours Recreational Screen time per Day N = 245,305; n = 2152 CI = 206,106 – 284,503	<4 Hours Recreational Screen–time per Day N = 229,463; n = 1868 CI = 194,206 – 264,719	χ 2
Demographic variables
Sex
Female	48.1% (44.8% – 51.3%)	53.0% (49.4% – 56.6%)	4.17*
Male	51.9% (48.7% – 55.2%)	47.0% (43.4 – 50.6%)	4.17*
Age
< 16 years	42.9% (35.6% – 50.6%)	37.9% (30.8% – 45.7%)
≥ 16 years	57.1% (49.4% – 64.4%)	62.1% (54.3% – 69.2%)	3.88*
Race
Non–Hispanic white	67.8% (59.3% – 75.2%)	74.2% (67.6% – 79.8%)	12.67***
Non–Hispanic black	18.1% (12.5% – 25.5%)	12.1% (8.1% – 17.7%)	9.65**
Hispanic	9.2% (6.9% – 12.2%)	7.6% (5.2% – 10.8%)	3.57
Asian	1.7% (1.2% –2.4%)	3.1% (2.2% –4.3%)	10.28***
Other	3.2% (2.5% – 4.0%)	3.1% (2.3% – 4.1%)	0.02
Academic achievement
Earned mostly A’s & B’s	78.4% (74.4% – 81.9%)	87.5% (83.6% – 90.5%)	21.28***
Overweight or obese	34.2% (31.1% – 37.5%)	24.6% (21.2% – 28.3%)	14.28***
Environmental level variables
Philadelphia City	5.6% (4.3% – 7.1%)	4.4% (3.4% – 5.7%)	8.07**
Perceived safety
Rarely/never feel safe	7.9% (6.3% – 9.9%)	7.2% (5.3% – 9.6%)	0.51
Health related variables
≥ 5 days physical activity	39.5% (35.7% – 43.5%)	51.1% (47.2% – 55.0%)	19.34***
≥ 1 day PE/week	59.3% (51.3% – 66.9%)	57.8% (49.0% – 66.1%)	0.29
≥ 1 sports teams	55.0% (51.5% – 58.4%)	67.2% (63.1% – 71.0%)	27.09***
≥ 8 h sleep/night	25.0% (22.5% – 27.7%)	26.3% (23.3% – 29.6%)	0.55
Current alcohol use	29.5% (26.0% – 33.3%)	31.8% (28.0% – 35.8%)	0.97
Current cigarette use	12.4% (9.7% – 15.6%)	11.4% (9.0% – 14.4%)	0.47
≥ 2 servings fruit/day	27.2% (24.5% – 30.0%)	30.7% (27.5% – 34.0%)	3.38
≥ 3 servings veg/ day	8.6% (6.8% – 10.9%)	12.4% (10.5% – 14.7%)	12.30***

The association between each dichotomous independent variable and the dichotomous outcome of high vs. low recreational screen based sedentary behavior (column 2 & 3) was examined using chi–square test of independence

*p ≤ .05 **p ≤ .01 ***p ≤ .001