Table 1.
Maternal and infant characteristics by infant birth weight-for-gestational age category, PROGRESS birth cohort, Mexico City.
| Covariates | Overall (n=504) | SGA (n=75) | AGA (n=419) | LGA (n=10) |
|---|---|---|---|---|
| Maternal age (years) | n (%) | Row % | ||
| < 25 | 172 (34.1) | 15.1 | 83.1 | 1.7 |
| 25 – 34 | 269 (53.4) | 15.2 | 83.3 | 1.5 |
| ≥ 35 | 63 (12.5) | 12.7 | 82.5 | 4.8 |
| Maternal 2nd trimester | ||||
| BMI (kg/m2) | ||||
| Normal (< 27) | 283 (56.2) | 15.9 | 83.0 | 1.1 |
| Overweight (27 – 32) | 161 (31.9) | 14.3 | 81.4 | 4.4 |
| Obese (> 32) | 60 (11.9) | 11.7 | 88.3 | 0.0 |
| Parity | ||||
| Nulliparous | 240 (47.6) | 14.2 | 84.2 | 1.7 |
| Multiparous | 264 (52.4) | 15.5 | 82.2 | 2.3 |
| Secondhand smoke exposure | ||||
| No | 365 (72.4) | 15.1 | 82.5 | 2.5 |
| Yes | 139 (27.6) | 14.4 | 84.9 | 0.7 |
| Education | ||||
| < High school | 193 (38.3) | 18.1 | 79.8 | 2.1 |
| High school | 187 (37.1) | 15.0 | 83.4 | 1.6 |
| > High school | 124 (24.6) | 9.7 | 87.9 | 2.4 |
| SES index | ||||
| Low | 257 (51.0) | 16.3 | 81.7 | 2.0 |
| Medium | 186 (36.9) | 14.5 | 84.4 | 1.1 |
| High | 61 (12.1) | 9.8 | 85.3 | 4.9 |
| Infant sex | ||||
| Male | 248 (49.2) | 14.9 | 83.5 | 1.6 |
| Female | 256 (50.8) | 14.8 | 82.8 | 2.3 |
Abbreviations: SGA - small-for-gestational age, AGA - appropriate-for-gestational age and LGA - large-for-gestational age.