Table V.
IQ, years of schooling, and income at 30 years, according to birth conditions
| IQ (points) | Years of schooling | Monthly income (R$) | ||||
|---|---|---|---|---|---|---|
| Mean (95% CI) | Adjusted regression coefficient (95% CI) | Mean (95% CI) | Adjusted regression coefficient (95% CI) | Mean (95% CI) | Adjusted regression coefficient (95% CI) | |
| Birthweight (g) | P < .001* | P < .001* | P < .001* | P = .003* | P < .001* | P < .001* |
| <2500 | 94.5(92.8to96.1) | Reference(0) | 10.5(10.0to11.0) | Reference(0) | 1190(1009to1370) | Reference(0) |
| 2500-2999 | 95.7(94.8to96.5) | 1.02(−0.47to2.51) | 10.6(10.4to10.9) | 0.04(−0.43to0.52) | 1266(1161to1370) | 69(−159to296) |
| 3000-3499 | 98.5(97.8to99.1) | 2.22(0.79to3.65) | 11.4(11.2to11.7) | 0.29(−0.17to0.75) | 1538(1444to1632) | 193(−26to412) |
| ≥3500 | 99.9(99.2to100.6) | 2.93(1.47to4.39) | 11.9(11.6to12.1) | 0.48(0.01to0.95) | 1709(1597to1821) | 315(91to538) |
| Preterm birth | P = .29 | P = .29 | P = .21 | P = .18 | P = .84 | P = .85 |
| No | 98.8(98.4to99.3) | Reference(0) | 11.6(11.5to11.8) | Reference(0) | 1592(1523to1660) | Reference(0) |
| Yes | 97.8(95.8to99.8) | −0.86(−2.56to0.84) | 11.2(10.6to11.8) | −0.36(−0.90to0.17) | 1562(1263to1861) | −12(−283to259) |
| Birthweight for gestational age(z-score) | P < .001* | P = .001* | P < .001* | P < .001* | P < .001* | P = .10* |
| <−1.28 | 95.7(94.5to96.9) | Reference(0) | 10.5(10.2to10.9) | Reference(0) | 1311(1159to1464) | Reference(0) |
| −1.28-0 | 98.1(97.4to98.8) | 1.26(0.06to2.46) | 11.3(11.1to11.5) | 0.35(−0.02to0.72) | 1558(1461to1655) | 138(−53to328) |
| >0 | 100.6(99.9to101.3) | 2.33(1.10to3.55) | 12.3(12.0to12.5) | 0.82(0.44to1.21) | 1721(1611to1831) | 179(−16to374) |
Adjusted for family income at birth, parental years of schooling, household asset index score, maternal skin color, and maternal smoking during pregnancy.
*
P-value for linear trend.