Table I.
Birthweight (standard) regressions with/without gestational age included; 95 per cent confidence intervals are also included.
| Covariate | Birthweight regression coefficients | |||
|---|---|---|---|---|
| Intercept | −3578.8 | (−3606.9,−3550.7) | 3385.5 | (3379.7,3391.4) |
| Reported maternal smoking | −187.8 | (−192.5,−183.0) | −227.2 | (−233.4,−221.0) |
| Male infant | 126.2 | (123.4,129.0) | 114.1 | (110.3,117.8) |
| Mother reported not married | −36.2 | (−39.8,−32.5) | −39.6 | (−44.4,−34.7) |
| Non-Hispanic black mother | −176.5 | (−180.3,−172.7) | −233.7 | (−238.7,−228.6) |
| Hispanic mother | −70.2 | (−75.1,−65.2) | −24.3 | (−30.8,−17.9) |
| Mother complete MS | −30.1 | (−36.9,−23.3) | −25.9 | (−34.7,−17.0) |
| Mother complete some HS | −30.2 | (−34.9,−25.5) | −39.2 | (−45.3,−33.0) |
| Mother complete some college | 26.5 | (22.3,30.6) | 27.3 | (21.8,32.7) |
| Mother complete college | 28.5 | (23.9,33.0) | 65.4 | (59.4,71.3) |
| Maternal age 15–19 | −35.4 | (−41.2,−29.5) | −26.9 | (−34.5,−19.2) |
| Maternal age 20–24 | −27.0 | (−31.0,−22.9) | −14.0 | (−19.4,−8.7) |
| Maternal age 30–34 | 18.1 | (13.9,22.2) | 0.8 | (−4.6,6.3) |
| Maternal age 35–40 | 21.9 | (16.5,27.2) | −15.3 | (−22.3,−8.3) |
| Maternal age 41–45 | −0.4 | (−11.2,10.3) | −58.7 | (−72.8,−44.6) |
| First birth infant | −120.1 | (−123.3,−116.9) | −93.9 | (−98.1,−89.7) |
| Gestational age | 180.2 | (179.5,180.9) | ||