Table 2.
Adjusted* relative risks (for categorical variables) and beta coefficients (for numerical variables) of different outcomes according to gestational age (reference group= 39–41 weeks)
|
Outcome |
Gestational age in completed weeks |
|||||
|---|---|---|---|---|---|---|
| <34 (n=348) | 34-36 (n=1202) | 37 (n=1680) | 38 (n=3089) | 39-41 (n=7055) | 42+ (n=745) | |
| Neonatal mortality (n=13031) |
34.4 (21.6; 54.8) |
3.4 (1.8; 6.6) |
2.7 (1.3; 5.6) |
2.0 (1.1; 3.5) |
1.0 |
2.1 (1.0; 4.3) |
| Infant mortality (n=13031) |
13.6 (9.7; 19.2) |
3.1 (2.1; 4.7) |
2.2 (1.4; 3.6) |
1.4 (0.9; 2.2) |
1.0 |
1.4 (0.9; 2.4) |
| Hospitalization 0–12 mo (n=5625) |
2.4 (1.9; 3.1) |
1.8 (1.4; 2.1) |
1.2 (1.0; 1.6) |
1.2 (1.0; 1.5) |
1.0 |
0.9 (0.7; 1.2) |
| Breastfeeding (months) (n=5620) |
−3.5 (−4.4; -2.4) |
−0.8 (−1.5; -0.2) |
−0.4 (−1.0; 0.3) |
−0.4 (−0.9; 0.1) |
0 |
−0.4 (−1.2; 0.3) |
| WAZ < −2 at 12 mo (%) (n=5615) |
3.2 (1.7; 6.1) |
2.6 (1.5; 4.5) |
2.0 (1.1; 3.7) |
1.4 (0.8; 2.5) |
1.0 |
1.6 (0.8; 2.5) |
| HAZ < −2 at 12 mo (%) (n=5604) |
2.0 (1.3; 2.9) |
1.7 (1.2; 2.3) |
1.3 (0.9; 1.9) |
1.2 (0.9; 1.6) |
1.0 |
1.0 (0.6; 1.5) |
| WHZ > 2 at 12 mo (%) (n=5604) |
0.5 (0.2; 1.0) |
0.7 (0.5; 1.0) |
1.2 (0.9; 1.6) |
1.0 (0.7; 1.2) |
1.0 |
0.9 (0.6; 1.2) |
| WAZ < −2 at 48 mo (%) (n=7983) |
1.4 (0.6; 3.1) |
1.4 (0.8; 2.5) |
0.9 (0.5; 1.7) |
1.0 (0.6; 1.6) |
1.0 |
0.8 (0.4; 1.5) |
| HAZ < −2 at 48 mo (%) (n=7946) |
0.9 (0.5; 1.5) |
1.0 (0.7; 1.4) |
0.9 (0.6; 1.2) |
0.8 (0.6; 1.1) |
1.0 |
0.9 (0.6; 1.2) |
| WHZ > 2 at 48 mo (%) (n=7946) | 1.1 (0.6; 1.8) | 0.8 (0.6; 1.1) | 1.0 (0.7; 1.2) | 1.0 (0.8; 1.2) | 1.0 | 1.0 (0.8; 1.3) |
Pelotas (Brazil) Birth Cohorts 1982, 1993, 2004.
Abbreviation: WAZ: weight for age z-score; HAZ: height for age z-score; WHZ: weight for height z-score.
* Adjusted for family income, parity, smoking, marital status, height, maternal education, and maternal age.