Table 1.
Infant and Maternal characteristics with archived newborn bloodspot samples in the Upstate KIDS Study, 2008–2010(n = 3111 infants, 2604 mothers) [mean ±SD or n(%)].
| Infant and Maternal Characteristics | |
| Gestational age (weeks) | 37.8 ±2.44 |
| Birthweight (g) | 3095.31 ±700.26 |
| Birth length boys (cm) | 49.95 ±3.96 |
| Birth length girls (cm) | 48.92 ±3.83 |
| Head circumference boys (cm) | 33.62 ±2.62 |
| Head circumference girls (cm) | 33.02 ±2.46 |
| Ponderal Index (g/cmA3×100) | 2.57 ±0.37 |
| Gestational Length (weeks) | |
| ≥37 | 2422 (78) |
| <37 | 689 (22) |
| Plurality | |
| Singleton | 2071 (67) |
| Twin | 1040 (33) |
| Sex | |
| Male | 1567 (50) |
| Female | 1544 (50) |
| Maternal Age (years) | |
| ≤29 | 1004 (39) |
| 30–39 | 1391 (53) |
| ≥40 | 209 (8) |
| Maternal Education | |
| High school or equivalent | 367 (14) |
| College/some college | 1408 (54) |
| Graduate school | 829 (32) |
| Maternal Prepregnancy Body Mass Index (kg/m2) | |
| <25 | 1271 (49) |
| 25.0–29.9 | 671 (25) |
| 30.0–34.9 | 328 (12) |
| ≥35.0 | 329 (12) |
| Maternal Parity | |
| Nulliparous | 1186 (46) |
| Parous | 1395 (54) |
| Maternal race/ethnicity | |
| White, non-Hispanic | 2180 (84) |
| Black, non-Hispanic | 90 (3) |
| Asian, non-Hispanic | 77 (3) |
| Hispanic | 106 (4) |
| Other/multi-race | 151 (6) |
| Maternal Infertility treatment | |
| No treatment | 1760 (68) |
| Yes, any treatment | 844 (32) |
| Maternal Infertility Treatment Type | |
| Ovulation induction/intrauterine insemination | 440 (52) |
| Assisted reproductive technologies | 403 (48) |
ART, Artificial reproductive technology
Birth length boys n= 1314; girls n = 1297
Head circumference boys n = 421; girls n = 441
OI, Ovulation induction; IUI: Intrauterine insemination
Ponderal Index (birthweight in grams/birth length in cm3 ×100)
n = 2611