Table 1.
Demographic and medical history information.
| Male (N = 119) | Female (N = 103) | |
|---|---|---|
| CONTINUOUS VARIABLES Mean (SD) | ||
| Age since DOBa (months) | 3.32 (0.36) | 3.36 (0.37) |
| Gestational age at birth (weeks) | 37.3 (3.0) | 37.7 (2.3) |
| Birth weight (g) | 2886 (816) | 2910 (563) |
| 5-Min APGAR Score | 8.7 (0.7) | 8.6 (0.7) |
| Maternal age (years) | 29.7 (6.1) | 30.3 (5.4) |
| Paternal age (years) | 31.5 (5.9) | 32.5 (6.1) |
| Maternal education (years) | 15.7 (3.3) | 15.7 (3.0) |
| Paternal education (years) | 15.7 (3.1) | 15.0 (3.0) |
| CATEGORICAL VARIABLES NO. (%) | ||
| Gestation number | Twin 65 (55%) | Twin 49 (48%) |
| Singleton 54 (45%) | Singleton 54 (52%) | |
| NICU stay >24 h | No 98 (82%) | No 86 (83%) |
| Yes 21 (18%) | Yes 17 (17%) | |
| Caesarian section | No 60 (50%) | No 56 (54%) |
| Yes 59 (50%) | Yes 47 (46%) | |
| Maternal ethnicity | White 89 (75%) | White 82 (80%) |
| Black 24 (20%) | Black 20 (19%) | |
| Asian 4 (3%) | Asian 1 (1%) | |
| Other 2 (1%) | ||
| Paternal ethnicity | White 86 (72%) | White 81 (79%) |
| Black 26 (22%) | Black 19 (18%) | |
| Asian 7 (6%) | Asian 3 (3%) | |
| Maternal psychiatric history | No 93 (78%) | No 81 (79%) |
| Yes 26 (22%) | Yes 22 (21%) | |
| Paternal psychiatric history | No 103 (87%) | No 94 (91%) |
| Yes 16 (13%) | Yes 9 (9%) | |
| Incomeb | High (29%) | High (33%) |
| Middle (39%) | Middle (37%) | |
| Low (30%) | Low (28%) | |
| Missing (2%) | Missing (2%) | |
| Maternal smoking | No 107 (90%) | No 93 (90%) |
| Yes 12 (10%) | Yes 10 (10%) | |
aDOB = date of birth,
blow income: at or below 200% of federal poverty level (FPL), middle income: between 200 and 400% of FPL, high income: above 400% of FPL.