Table 1.
Demographic characteristics of 753 mom infant dyads in TIDES.
| Characteristic | Total n (%) | Term n (%) | Preterm n (%) |
|---|---|---|---|
| Study Center | |||
| UCSF | 187 (25) | 173 (25) | 14 (19) |
| UMN | 202 (27) | 180 (27) | 22 (30) |
| URMC | 212 (28) | 186 (27) | 26 (35) |
| UW | 152 (20) | 140 (21) | 12 (16) |
| Maternal Age (years) | |||
| <20–<30 | 291 (39) | 260 (38) | 31 (43) |
| 30–<40 | 426 (57) | 393 (58) | 33 (45) |
| >40 | 32 (4) | 23 (3) | 9 (12) |
| Pre-Pregnancy BMI | |||
| 20–<24.9 | 435 (58) | 405 (60) | 30 (41) |
| 25–<29.9 | 164 (22) | 144 (21) | 20 (28) |
| >30 | 145 (19) | 123 (18) | 22 (31) |
| Race/Ethnicity | |||
| NH White | 496 (66) | 446 (66) | 50 (68) |
| NH Black | 86 (11) | 75 (11) | 11 (15) |
| NH Asian | 48 (6) | 46 (7) | 2 (3) |
| Hispanic | 67 (9) | 61 (9) | 6 (8) |
| Other/Mixed/Unknown | 52 (7) | 48 (7) | 4 (5) |
| Education | |||
| ≤High school/Some college | 191 (26) | 173 (26) | 18 (25) |
| College/post graduate | 554 (74) | 499 (74) | 55 (75) |
| Any Smoking During Pregnancy | |||
| Yes | 54 (7) | 50 (7) | 4 (6) |
| No | 695 (93) | 627 (93) | 68 (94) |
| Parity | |||
| Nulliparous | 276 (38) | 252 (38) | 24 (35) |
| Parous | 451 (62) | 406 (62) | 45 (65) |
| Gestatational Age at Birth (weeks) | |||
| 25–≤37 | 74 (10) | N/A | 74 (100) |
| >37 | 679 (90) | 679 (100) | N/A |
| Income | |||
| <$25,000 | 173 (24) | 149 (23) | 24 (33) |
| $25,000–74,999 | 197 (27) | 185 (28) | 12 (17) |
| ≥$75,000 | 356 (49) | 320 (49) | 36 (50) |
| Infant Sex | |||
| Male | 369 (49) | 331 (49) | 38 (51) |
| Female | 384 (51) | 348 (51) | 36 (49) |
| Infant Birthweight, kg (mean (SD)) | 3.35 (0.6) | 3.44 (0.5) | 2.60 (0.7) |