TABLE 3.
Multilevel Logistic Regression Model Results: Illinois Transgenerational Birthfile, Cook County, 1989–1991
| Model No. | Characteristic | No. | Residential Environment at Birth/Adulthood | COR (95% CI) | AORa (95% CI) |
| A1 | All infants | 19 448 infants, 708 neighborhoods | 1st quartile/2nd quartileb | 0.8* (0.8, 0.9) | 0.9 (0.9, 1.0) |
| 1st quartile/3rd quartileb | 0.8* (0.7, 0.9) | 1.0 (0.8, 1.1) | |||
| 1st quartile/4th quartileb | 0.6* (0.5, 0.8) | 0.8* (0.6, 1.0) | |||
| A2 | Infants of 20- to 35-y-old women who were LBW | 2273 infants, 453 neighborhoods | 1st quartile/2nd quartileb | 0.9 (0.7, 1.1) | 0.9 (0.7, 1.1) |
| 1st quartile/3rd quartileb | 0.8 (0.6, 1.1) | 0.8 (0.6, 1.2) | |||
| 1st quartile/4th quartileb | 0.8 (0.4, 1.4) | 0.9 (0.5, 1.7) | |||
| A3 | Infants of 20- to 35-y-old women who were not LBW | 0.8* (0.7, 0.9) | 0.9 (0.8, 1.0) | ||
| 1st quartile/3rd quartileb | 0.8* (0.7, 1.0) | 1.0 (0.9, 1.2) | |||
| 1st quartile/4th quartileb | 0.5* (0.4, 0.7) | 0.7* (0.5, 0.9) | |||
| B1 | All infants | 4840 infants, 374 neighborhoods | 2nd quartile/3rd or 4th quartilec | 0.8 (0.7, 1.0) | 0.9 (0.7, 1.1) |
| B2 | Infants of 20- to 35-y-old women who were LBW | 462 infants, 167 neighborhoods | 2nd quartile/3rd or 4th quartilec | 1.5 (0.8, 2.7) | 1.7 (0.9, 3.3) |
| B3 | Infants of 20- to 35-y-old women who were not LBW | 3479 infants, 339 neighborhoods | 2nd quartile/3rd or 4th quartilec | 0.7* (0.6, 0.9) | 0.8 (0.7, 1.0) |
Note. AOR = adjusted odds ratio; CI = confidence interval; COR = crude odds ratio; LBW = low birth weight.
a
Controlling for maternal birth weight, age, education, parity, marital status, prenatal care utilization, and cigarette smoking.
b
Referent group = 1st quartile/1st quartile.
c
Referent group = 2nd quartile/2nd quartile.
*
P < .05.