Table 1.
Descriptive statistics for the present sample.
| VPT infants (n = 27, 14 females) |
FT infants (n = 26, 14 females) |
||||
|---|---|---|---|---|---|
| Mean | SD | Mean | SD | t | |
| Neonatal variables | |||||
| Gestational age (weeks) | 31.07 | 1.73 | 39.64 | 1.22 | −16.55*** |
| Birth weight (grams) | 1,512.04 | 336.13 | 3,372.31 | 402.49 | −19.99*** |
| Apgar at minute 1 | 6.48 | 1.40 | 9.77 | 0.69 | −11.15*** |
| NICU-related variables | |||||
| Length of NICU stay (days) | 39.19 | 16.53 | n.a. | n.a. | n.a. |
| Days on ventilation | 12.50 | 13.98 | n.a. | n.a. | n.a. |
| Pain-related stress index | 13.00 | 14.11 | n.a. | n.a. | n.a. |
| Sociodemographic variables | |||||
| Maternal age (years) | 36.34 | 4.79 | 33.91 | 3.89 | 2.11* |
| Maternal education (years of study) | 15.56 | 2.41 | 15.00 | 3.79 | 1.14 |
| Family SES | 57.69 | 17.28 | 65.96 | 20.30 | −0.99 |
| Maternal psychological symptoms variables | |||||
| BDI score | 7.20 | 4.59 | 7.50 | 4.86 | −0.60 |
| STAI state score | 29.64 | 6.71 | 30.75 | 6.65 | −0.19 |
| STAI trait score | 35.50 | 6.14 | 36.45 | 6.11 | −0.28 |
VPT, very preterm; FT, full-term; NICU, Neonatal Intensive Care Unit; SES, socioeconomic status assessed according to Hollingshead (57); BDI, Beck Depression Inventory; STAI, State-Trait Anxiety Inventory.
*p < 0.05, ***p < 0.001.