TABLE 1.
Demographics
| Mean ± SD (range) | Entire population (n = 784) | <500 Meters from major roadway (n = 422) | >500 Meters from major roadway (n = 362) | P value |
|---|---|---|---|---|
| Demographics | ||||
| Sex (% female) | 42.0 | 41.5 | 42.5 | .76 |
| Race or ethnicity (% non-white) | 66.3 | 70.6 | 61.3 | .006 |
| Gestation, wk | 26.6 ± 2.3 | 26.6 ±2.3 | 26.7 ± 2.2 | .87 |
| (22.9–32) | (23.9–32) | (22.7–32) | ||
| Birth weight, g | 905 ± 324 | 907 ± 324 | 902 ± 325 | .83 |
| (380–2310) | (390–2310) | [380–2070) | ||
| (n = 772) | (n = 417) | (n = 355) | ||
| Birth weight (percentile) | 42.0 ± 24.4 | 42.7 ±24.6 | 41.2 ± 24.1 | .42 |
| (1–95) | (1–95) | (1–94) | ||
| (n = 772) | (n = 417) | (n = 355) | ||
| Median household income ($ 000’s) | 64.3 ± 22.5 | 60.8 ± 21.3 | 68.3 ± 23.2 | <.001 |
| (15.6–156.6) | (15.6–132.7) | (15.6–156.6) | ||
| Population density (persons/square km) | 1547 ±1353 | 1757 ±1497 | 1302 ± 1116 | <.001 |
| (11–6981) | (11–6981) | (11–6981) | ||
| Public Insurance (% yes) | 57.1 | 60.2 | 53.6 | .06 |
| Secondhand smoke exposure (% yes) | 28.7% | 29.1% | 28.1% | .78 |
| (n = 712) | (n = 385) | (n = 327) | ||
| Clinical data | ||||
| Age at discharge from NICU, Mo | 4.3 ± 2.7 | 4.3 ±2.7 | 4.3 ± 2.7 | .91 |
| (0.5–26.5) | (0.5–26.5) | (0.5–24.5) | ||
| (n = 782) | (n = 421) | (n = 361) | ||
| Age at discharge from NICU (Wk post- conceptual age) | 45.4 ± 11.4 (30.9–141.1) | 45.3 ±11.2 (33.9–141.1) | 45.4 ± 11.5 (30.9–133.4) | .89 |
| (n = 782) | (n = 421) | (n = 361) | ||
| Age at first pulmonary clinic visit, Mo | 7.7 ± 5.6 | 7.6 ± 5.8 | 7.9 ± 5.7 | .55 |
| (1.4–51.2) | (1.4–51.2) | (1.9–48.8) | ||
| Home supplemental oxygen (% yes) | 38.5 | 39.6 | 37.3 | .51 |
| Home ventilator (% yes) | 3.1 | 2.1 | 4.1 | .10 |
| Gastrostomy tube (% yes) | 26.4 | 25.1 | 27.9 | .38 |
| Ventricular shunt (% yes) | 8.4 | 8.8 | 8.0 | .70 |
| Inhaled corticosteroid use (% yes) | 80.4 | 82.0 | 78.5 | .21 |
Abbreviation: NICU, neonatal intensive care unit.