Table 3.
Predictors of psychological distress: Main effects and interactions between groups.
| Main Effect of Being Preterm vs. Full-term | Main Effect of Explanatory Variable (n=84) | Interaction of Being Preterm vs Full-term and Explanatory Variable | Preterm Group (n=37) | Full-term (n=47) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| *p | Beta (CI) | *p | Beta (CI) | *p | Beta (CI) | *p | Beta (CI) | *p | Beta (CI) | |
| Infant Factors | ||||||||||
| Female Gender | NS | NS | NS | |||||||
| Non Caucasian Race | NS | NS | NS | |||||||
| EGA | .13 | −.22 (−.5, .06) | — | — | ||||||
| Birthweight (g) | .03 | −.002 (−.004, 0) | — | — | ||||||
| Apgars at 1 min | .18 | −.21 (−.51, .09) | — | — | ||||||
| Apgars at 5 min | .24 | −.24 (−.66, .18 | — | — | ||||||
| Breast Milk | 1.0 | −20.556 (−35970.16, 35929.04) | — | — | ||||||
| Breast Milk at Discharge | .07 | −1.451 (−3.03, .13) | — | — | ||||||
| Infant Medical Procedures | ||||||||||
| Days on TPN | .19 | .056 (−.024, .136) | — | — | ||||||
| Days on Vent | .44 | .015 (−0.025, .055) | — | — | ||||||
| NIMV days | .63 | .010 (−.03, .05) | — | — | ||||||
| Days on CPAP | .49 | .072 (−.148, .292 ) | — | — | ||||||
| Days on Nasal Cannula | .44 | .012 (−.028, .052) | — | — | ||||||
| Maternal Factors | ||||||||||
| Moms Age | NS | NS | NS | |||||||
| Cesarean section Delivery | .641 | 1.0 (−.46, 2.5) | .21 | .60 (−.63, 1.8) | .015 | −2.5 (−4.5, − .47) | .02 | 1.887 (.267, 3.507 ) | NS | |
| Multiples | NS | NS | NS | |||||||
| Other Children | NS | NS | NS | |||||||
| Single | NS | NS | NS | |||||||
| Income <$25,000 | NS | NS | NS | |||||||
| College Degree | NS | NS | NS | |||||||
Note: Psychological distress was defined as scoring above the 75th percentile on the PSS, EPDS, STAI (state), or modified PPQ. Infant medical procedures and infant medical factors related to health status (Birthweight, Apgars, and Breast Milk use were only collected for the preterm mother-infant dyads as they were NICU specific variables. Therefore, analyses investigating relationships between those variables and psychological distress are only reported for the preterm group. Other cells related to these factors are therefore shaded black.
p value is from estimating factorial generalized linear model with binomial variable (psychological distress) with logit link. The main effects of being preterm vs. full-term denote if there were differences in the variable across the two groups. The main effects of the explanatory variable denotes if each variable is related to psychological distress in the entire cohort (full-term and preterm; n=84). The interaction p value denotes whether being preterm or full-term has an effect on whether the explanatory variable was related to psychological distress. When the interaction p value is >.05, there is no interaction and main effects can be interpreted. When the interaction p value is <.05, the relationship between the explanatory variable and psychological distress must be interpreted separately for the preterm and full-term groups.
EGA: Estimated Gestational Age; TPN: Total Parenteral Nutrition; NIMV: Nasal Intermittent Mandatory Ventilation; CPAP: Continuous Positive Airway Pressure