Mental Health Outcomes in US Children and Adolescents Born Prematurely or with Low Birthweight

Table 2

Descriptive statistics of the sample for children aged 2–17 years, according to perinatal and sociodemographic characteristics: the 2011-2012 National Survey of Children’s Health (𝑁 = 85,535).

Sociodemographic characteristics	Unweighted number in sample	Weighted percent in sample
Child born prematurely (<37 weeks of gestation)
Premature	9,590	11.45
Not premature	75,095	88.55
Child’s birthweight
Very low birthweight (<1,500 g)	1,255	1.68
Moderately low birthweight (1,500–2,499 g)	6,137	7.85
Normal birthweight (≥2,500 g)	73,626	90.47
Child’s age (years)
2–5	19,942	24.37
6–11	31,030	37.32
12–17	34,563	38.31
Child’s sex
Male	44,178	51.22
Female	41,357	48.78
Race/ethnicity
Hispanic	11,136	22.55
Non-Hispanic white	55,235	51.58
Non-Hispanic black	8,073	13.43
Non-Hispanic mixed race	4,649	4.68
Other (Asians/Pacific Islanders and American Indians)	6,442	7.76
Household composition
Two-parent biological	58,306	63.08
Two-parent stepfamily	6,517	9.64
Single mother	13,708	19.19
Other family type	7,004	8.10
Place of residence
Metropolitan	62,845	84.35
Nonmetropolitan	21,486	15.65
Highest household or parental education level (years)
<12	4,893	11.64
12	12,771	19.91
13–15	21,500	24.66
16+	44,186	43.79
Household poverty status (ratio of family income to poverty threshold)
Below 100%	12,882	21.95
100–199%	15,347	21.72
200–399%	26,139	28.44
At or above 400%	31,167	27.90