Table 1.
Characteristics of the mothers and infants.
| Birth weight (g) |
||||
|---|---|---|---|---|
| Characteristic | n (%) | Mean | 95% CI | p-Value |
| Maternal characteristics | ||||
| Age (years) | ||||
| < 30 | 187 (44.8) | 3313.0 | 3250.6–3375.5 | 0.22 |
| 30 to < 35 | 178 (42.8) | 3273.9 | 3217.7–3330.0 | |
| ≥ 35 | 52 (12.5) | 3200.6 | 3057.3–3343.8 | |
| Prepregnancy BMI (kg/m2) | ||||
| < 18.5 | 55 (13.3) | 3170.5 | 3073.4–3267.5 | 0.02 |
| 18.5 to < 23.0 | 233 (56.4) | 3274.4 | 3222.6–3326.2 | |
| ≥ 23.0 | 125 (30.3) | 3361.2 | 3277.6–3444.8 | |
| Education (years) | ||||
| < 12 | 135 (33.7) | 3275.7 | 3197.9–3353.4 | 0.94 |
| ≥ 12 | 265 (66.3) | 3279.0 | 3229.3–3328.7 | |
| Fish consumption (g/day) | ||||
| ≤ 150 | 344 (90.0) | 3267.3 | 3221.8–3312.9 | 0.17 |
| > 150 | 39 (10.0) | 3367.1 | 3230.1–3504.0 | |
|
GSTM1 | ||||
| Present | 169 (40.5) | 3289.6 | 3225.2–3353.9 | 0.77 |
| Null | 248 (59.5) | 3277.3 | 3224.5–3330.2 | |
|
GSTT1 | ||||
| Present | 195 (46.8) | 3262.8 | 3199.4–3326.1 | 0.37 |
| Null | 222 (53.2) | 3299.4 | 3246.6–3352.3 | |
| Infant characteristics | ||||
| Sex | ||||
| Male | 207 (49.6) | 3315.8 | 3253.9–3377.6 | 0.11 |
| Female | 210 (50.4) | 3249.3 | 3196.1–3249.3 | |
| Parity | ||||
| 0 | 109 (28.1) | 3292.7 | 3215.6–3369.8 | 0.99 |
| 1 | 177 (45.6) | 3287.9 | 3218.6–3357.2 | |
| ≥ 2 | 102 (26.3) | 3282.8 | 3211.6–3354.1 | |
| Gestational age (weeks) | ||||
| < 37 | 14 (3.4) | 2512.1 | 2168.3–2855.9 | < 0.01 |
| ≥ 37 | 403 (96.6) | 3309.0 | 3270.8–3347.3 | |
| Birth weight (g) | ||||
| < 2,500 | 7 (1.7) | 2074.3 | 1513.4–2635.2 | < 0.01 |
| ≥ 2,500 | 410 (98.3) | 3302.9 | 3265.2–3340.7 | |
Numbers within subgroups vary slightly because of missing values for some variables.