Table 2.
Sample Perinatal Characteristics
| Preterm (n = 74) | Full-Term (n = 76) | ||
|---|---|---|---|
| M (SD) | M (SD) | p | |
| Birth History | |||
| Gestational age (weeks) | 35.14 (1.46) | 39.80 (.94) | < .01* |
| Birth weight (grams) | 2569.65 (526.09) | 3705.28 (487.56) | < .01* |
| Apgar at 1 minute | 7.76 (1.47) | 8.13 (1.10) | .10 |
| Apgar at 5 minutes | 8.65 (1.06) | 8.97 (.37) | .02* |
| Length of hospital stay (days) | 9.77 (10.02) | 1.93 (.78) | < .01* |
| Maternal age at delivery (years) | 31.32 (4.44) | 32.20 (4.71) | .25 |
| n (%) | n (%) | p | |
| Pregnancy Related Characteristics | |||
| Twin gestationa | 16 (21.6) | 0 (0) | < .01* |
| Cesarean delivery | 38 (52.1) | 13 (17.3) | < .01* |
| Preeclampsia or hypertension | 17 (23.0) | 2 (2.7) | < .01* |
| Diabetes mellitus | 9 (12.2) | 6 (8.0) | .40 |
| Neonatal Complications | |||
| Glucose treatment | 20 (27.0) | 1 (1.3) | < .01* |
| Phototherapy | 25 (33.8) | 2 (2.6) | < .01* |
| Respiratory distress | 19 (25.7) | 1 (1.3) | < .01* |
| Positive pressure ventilation | 9 (12.2) | 2 (2.7) | .03 * |
| Apnea | 12 (16.2) | 0 (0) | < .01* |
| Hypovolemia | 2 (2.7) | 0 (0) | .25 |
Notes. Not all children contributed usable data for all tasks; information about the subsample of children who provided useable ERP data is presented in Table S2 in the Supplemental Methods & Results. One full-term parent declined to provide access to medical records. p represents the p-value corresponding to the independent samples t-test or Chi square test.
a
Only one twin per pair was tested.
*
p < .05