Table 1.
Socio-demographic characteristics and behavioral factors for the overall cohort and by race/ethnicity
| Overall (N = 296) | NHW (N = 102) | B/AA (N = 30) | H (N = 164) | P value | |
|---|---|---|---|---|---|
| Socio-demographic | |||||
| Gestational age (weeks) | 38.6 (1.9) | 38.5 (1.8) | 37.9 (3.1) | 38.8 (1.6) | .05 |
| Age at assessment (weeks) | 18.7 (2.4) | 18.7 (2.3) | 18.7 (3.2) | 18.8 (2.34) | .9 |
| Sex (F/M) | 137/159 | 46/56 | 13/17 | 78/86 | .9 |
| Maternal age (years) | 31.7 (5.5) | 33.4 (4.8) | 32.3 (7.2) | 30.5 (5.2) | .0001 |
| Mode of delivery | .2 | ||||
| Vaginal | 175 (59.1%) | 67 (65.7%) | 17 (56.7%) | 91 (55.5%) | |
| Cesarean | 117 (39.5%) | 33 (32.3%) | 13 (43.3%) | 71 (43.3%) | |
| Medical insurance | <.0001 | ||||
| Commercial | 151 (51.0%) | 90 (88.2%) | 15 (50.0%) | 46 (28.0%) | |
| Medicaid | 144 (48.6%) | 12 (11.8%) | 15 (50.0%) | 117 (71.3%) | |
| Parent-infant bedtime behavioral factors | |||||
| Sleep environment | <.001 | ||||
| Crib in a separate room | 46 (15.7%) | 30 (29.4%) | 4 (13.3%) | 12 (7.5%) | |
| Crib in mother's room | 226 (77.4%) | 68 (66.7%) | 21 (70%) | 137 (85.6%) | |
| Co-sleeping | 20 (6.8%) | 4 (3.9%) | 5 (16.7%) | 11 (6.8%) | |
| How does baby fall asleep | |||||
| While feeding/being rocked/being held/In bed near parent | 240 (81.1%) | 76 (74.5%) | 26 (86.7%) | 138 (84.1%) | .1 |
| In bed alone | 56 (18.9%) | 26 (25.5%) | 4 (13.3%) | 26 (15.8%) | |
| Bedtime | <.001 | ||||
| Up to 7 PM | 46 (15.9%) | 35 (34.3%) | 3 (10.0%) | 8 (5.1%) | |
| 7-8 PM | 61 (21.03%) | 28 (27.4%) | 6 (20.0%) | 27 (17.1%) | |
| 8-10 PM | 121 (41.7%) | 29 (28.4%) | 10 (33.3%) | 82 (51.9%) | |
| 10PM-12 AM | 45 (15.5%) | 8 (7.8%) | 8 (26.7%) | 29 (18.3%) | |
| After 12 AM | 17 (5.9%) | 2 (2.0%) | 3 (10%) | 12 (7.6%) | |
| Breastfeeding | .007 | ||||
| Exclusively breastmilk | 98 (33.1%) | 48 (47.1%) | 11 (36.7%) | 39 (23.8%) | |
| Breastmilk and formula | 94 (31.7%) | 32 (31.4%) | 8 (26.7%) | 54 (32.9%) | |
| Exclusively formula | 104 (35.1%) | 22 (21.6%) | 11 (36.7%) | 71 (43.3%) | |
B/AA, Black/African American; H, Hispanic; NHW, non-Hispanic White.