Table 1. Descriptive statistics of the study sample (N = 36,954), children aged 6-17, National Survey of Children’s Health (NSCH), 2017-2018.
Abbreviations: NBW, Normal birth weight; NP, Not premature; LBW, Low birth weight; P, Premature
a Unweighted count
b p values were determined by the χ2 test on weighted data.
| Non-Asthma (n=31378) | Asthma (n=5576) | |||||
| Total sample, weighted (%) | Weighted freq (Na) | Weighted % | Weighted freq (Na) | Weighted% | p value b | |
| Age of Child | ||||||
| 6-11 years | 49.9 | 21205294 (13694) | 86.7 | 3249198 (2044) | 13.3 | <0.001 |
| 12-17 years | 50.1 | 20557148 (17684) | 83.9 | 3972948 (3532) | 16.1 | |
| Sex | ||||||
| Female | 48.9 | 20906444 (15420) | 87.2 | 3070865 (2341) | 12.8 | <0.001 |
| Male | 51.1 | 20953787 (15958) | 83.5 | 4151280 (3235) | 16.5 | |
| Race | ||||||
| White non-Hispanic | 50.2 | 21506759 (22051) | 87.3 | 3139694 (3548) | 12.7 | <0.001 |
| Hispanic | 25.6 | 10736775 (3635) | 85.5 | 1827689 (688) | 14.5 | |
| Black non-Hispanic | 14.0 | 5441851 (1851) | 78.9 | 1453887 (585) | 21.1 | |
| Multiracial/Others | 10.1 | 4174846 (3841) | 83.9 | 800875 (755) | 16.1 | |
| Parental smoking | ||||||
| No | 84.6 | 35042053 (26372) | 86.1 | 5656688 (4500) | 13.9 | <0.001 |
| Yes | 15.4 | 6062817 (4549) | 81.6 | 1363441 (18.4) | 18.4 | |
| Secondhand Smoking | ||||||
| None | 84.7 | 35042053 (26372) | 86.1 | 5656688 (4500) | 13.9 | <0.001 |
| Outdoor smoking | 12.9 | 5075019 (3891) | 81.7 | 6721905 (810) | 18.3 | |
| Indoor smoking | 2.4 | 920268 (613) | 80.5 | 1643783 (177) | 19.5 | |
| Composite Indicator | ||||||
| NBW + NP | 84.6 | 33406473 (25760) | 86.0 | 5422826 (4305) | 14.0 | <0.001 |
| LBW+ NP | 3.6 | 1455151 (848) | 87.2 | 213462 (138) | 12.8 | |
| NBW + P | 5.8 | 2128902 (1626) | 79.8 | 538852 (402) | 20.2 | |
| LBW+P | 5.9 | 2126642 (1553) | 78 | 599410 (429) | 22.0 | |
| Parent education | ||||||
| Some college or higher | 30.4 | 12746093 (5057) | 85.5 | 2155079 (998) | 14.5 | 0.72 |
| High school or lower | 69.6 | 29114139 (26321) | 85.2 | 50567066 (4578) | 14.8 | |
| Family structure | ||||||
| Two family structure | 72.8 | 29995380 (23795) | 86.1 | 4841710 (3898) | 13.9 | 0.003 |
| Single/no family structure | 27.2 | 10876253 (7063) | 83.5 | 2148094 (1578) | 16.5 | |
| Mold in home | ||||||
| No | 89.6 | 37002348 (28031) | 85.8 | 6105913 (4798) | 14.2 | <0.001 |
| Yes | 10.4 | 4069659 (2855) | 81.0 | 951942 (691) | 9.0 | |
| Home pesticide use | ||||||
| No | 49.3 | 19226657 (16078) | 85.7 | 3218181 (2718) | 14.3 | 0.61 |
| Yes | 50.7 | 19672080 (13569) | 85.2 | 3405575 (2535) | 14.8 | |