Results of the OLS (Reduced Form) Regressions Explaining Birth Weight in ALSPAC
| Baseline Sample 1 | Smokers (Cotinine > 100 ng/mL) | Nonsmokers (Cotinine < 100 ng/mL) | ||||
|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | |
| rs1051730 | –16.7+ | –16.7+ | –42.9 | –66.9* | 8.5 | 9.3 |
| (9.6) | (9.5) | (29.3) | (29.4) | (17.8) | (17.6) | |
| Control variables | No | Yes | No | Yes | No | Yes |
| R-squared | 0.001 | 0.040 | 0.005 | 0.124 | 0.002 | 0.074 |
| N | 7,598 | 7,598 | 828 | 828 | 2,014 | 2,014 |
Notes: Coefficients are displayed with robust standard errors in parentheses. All regressions correct for genetic relatedness among the mothers using the first four principal components of the genetic relationship matrix. +p < 0.1, *p < 0.05, **p < 0.01.