Table 3.

Characteristics of participants, aged 2–5 years, from NHANES 1999–2002 by computer exposure.*

	0 hours	> 0 hours
Gender
Male	45.6 +/- 2.9	54.4 +/- 2.9
Female	46.0 +/- 2.2	54.0 +/- 2.2
Age†
2 years	59.8 +/- 3.1	40.2 +/- 3.1
3 years	48.7 +/- 3.5	51.3 +/- 3.5
4 years	39.7 +/- 2.6	60.3 +/- 2.6
5 years	33.1 +/- 3.1	66.9 +/- 3.1
Race/ethnicity‡
Non-Latino White	47.8 +/- 3.0	52.2 +/- 3.0
Non-Latino Black	36.8 +/- 2.1	63.2 +/- 2.1
Mexican-American	52.6 +/- 3.1	47.4 +/- 3.1
Other	38.5 +/- 6.0	61.6 +/- 6.0
Poverty Income Ratio§
0 < 2	51.1 +/- 2.4	48.9 +/- 2.4
≥ 2 < 4	42.2 +/- 3.3	57.8 +/- 3.3
≥ 4	38.1 +/- 4.1	61.9 +/- 4.1

* Estimated percentages +/- standard errors are given. n = 1799, subjects with missing data were excluded.

† P < 0.0001 for the Pearson chi-squared statistic

‡ P = 0.044 for the Pearson chi-squared statistic

§P = 0.011 for the Pearson chi-squared statistic