Table 2.
Results of multivariate linear regression for 4th-grade reading EOG score data (N = 57,678)a.
| Response variable: 4th-grade reading EOG scoreb | Coef. | p > t | 95% confidence interval |
|---|---|---|---|
| Dummy for BLL equal to 2 μg/dL | −0.30 | 0.04 | (−0.58, −0.01) |
| Dummy for BLL equal to 3 μg/dL | −0.46 | 0.00 | (−0.73, −0.19) |
| Dummy for BLL equal to 4 μg/dL | −0.52 | 0.00 | (−0.79, −0.24) |
| Dummy for BLL equal to 5 μg/dL | −0.80 | 0.00 | (−1.08, −0.51) |
| Dummy for BLL equal to 6 μg/dL | −0.99 | 0.00 | (−1.29, −0.68) |
| Dummy for BLL equal to 7 μg/dL | −1.07 | 0.00 | (−1.40, −0.74) |
| Dummy for BLL equal to 8 μg/dL | −1.35 | 0.00 | (−1.73, −0.97) |
| Dummy for BLL equal to 9 μg/dL | −1.20 | 0.00 | (−1.64, −0.75) |
| Dummy for BLL equal to 10 μg/dL or higher | −1.75 | 0.00 | (−2.09, −1.41) |
| Screened for lead between 18 and 27 months of age | 0.36 | 0.61 | (−0.10, 0.17) |
| Screened for lead between 27 and 36 months of age | −0.61 | 0.00 | (−0.78, −0.43) |
| Black (1 for black; 0 for white) | −3.55 | 0.00 | (−3.71, −3.40) |
| Male (1 for male; 0 for female) | −1.50 | 0.00 | (−1.62, −1.38) |
| Enrolled in free or reduced lunch program | −2.09 | 0.00 | (−2.24, −1.94) |
| Parents with some high school education | −2.78 | 0.00 | (−3.01, −2.55) |
| Parents with some post-high school education | 2.00 | 0.00 | (1.84, 2.15) |
| Parents completed college | 4.94 | 0.00 | (4.75, 5.12) |
| Parents completed graduate school | 7.12 | 0.00 | (6.77, 7.47) |
| Charter schools | −2.58 | 0.00 | (−3.06, −2.10) |
| Constant | 255.03 | 0.00 | (254.67, 255.39) |
a
The individual school system level dummy variables (N = 114) are not presented.
b
The mean 4th-grade reading EOG score for this sample is 251.9, the median 252, and the standard deviation 8.5. The interquartile range was 12.