Table 5.
Linear mixed effects model examining associations between prenatal maternal psychological distress and mean fetal heart rate (N = 149)
| Fixed effects | Estimate (SE) | Std estimate | 95% CI | t | p |
|---|---|---|---|---|---|
| Intercept | 138.40 (1.76) | .07 | [134.94, 141.85] | 78.44 | <.001 |
| Weeks’ gestation (centered at 37 weeks) | −0.37 (0.07) | −.21 | [−0.51, −0.23] | −5.28 | <.001 |
| Prenatal maternal psychological distress | 1.67 (0.86) | .09 | [−0.02, 3.36] | 1.94 | .05 |
| Gestational age at birth | −0.15 (0.45) | −.02 | [−1.02, 0.73] | −0.33 | .74 |
| Obstetric risk (any risk) | 1.77 (1.04) | .23 | [−0.28, 3.82] | 1.70 | .09 |
| SES | 0.18 (0.30) | .04 | [−0.41, 0.76] | 0.60 | .55 |
| Cohabitating with infant’s father | −1.17 (1.76) | −.15 | [−4.62, 2.29] | −0.66 | .51 |
| Weeks’ gestation × maternal distress | 0.12 (0.10) | .05 | [−0.07, 0.31] | 1.25 | .21 |
| Random effects | Variance | SD | |||
| Intercept | 17.96 | 4.24 | |||
| Residual | 37.12 | 6.09 |
Note. Mean fetal heart rate is the dependent variable. Marginal R2GLMM (variance explained by fixed effects) = .07. Conditional R2GLMM (variance explained by entire model, including fixed and random effects) = .37.