Table 2.
Lineal regression analysis for birth weight as a dependent variable.
| Birth Weight | p-Value | |
|---|---|---|
| Step 1—Maternal variables (R2 = 0.95; p-value = 0.001) | ||
| Maternal age | 58.5 ± 31.6 | 0.07 |
| Educational level: University degree | 578.7 ± 321.1 | 0.08 |
| Civil status: married | −16.9 ± 289.5 | 0.95 |
| Work situation: no employment | −341.6 ± 437.9 | 0.44 |
| Assisted reproduction techniques | −745.6 ± 346.5 | 0.038 |
| Parity | 142.7 ± 285.2 | 0.62 |
| Previous miscarriage | 235.0 ± 223.3 | 0.30 |
| Step 2—First trimester variables (R2 = 0.95; p-value = 0.001) | ||
| Negative affect | −96.7 ± 135.0 | 0.48 |
| Anxiety | 147.7 ± 191.1 | 0.44 |
| Optimism | −116.8 ± 105.7 | 0.27 |
| Resilience | 370.2 ± 97.0 | 0.001 |
| Red blood cells | 480.3 ± 144.4 | 0.001 |
| Platelets | −0.13 ± 1.2 | 0.91 |
| Leukocytes | −49.6 ± 39.4 | 0.21 |
| Glucose | −0.65 ± 2.2 | 0.77 |
| Total cholesterol | −0.17 ± 2.6 | 0.95 |
| Triglycerides | −4.7 ± 2.5 | 0.06 |
| Polyphenols | −0.73 ± 1.1 | 0.50 |
| Step 3—Second trimester variables (R2 = 0.94; p-value = 0.001) | ||
| Family–work conflict | −33.4 ± 92.8 | 0.72 |
| Pregnancy concerns | 69.1 ± 113.1 | 0.54 |
| General resources | 147.1 ± 86.0 | 0.09 |
| Life satisfaction | 423.3 ± 32.6 | 0.001 |
Data show estimated beta coefficients ± SE and p-values. Adjusted explained variance (R2) and associated p-values are shown at each step.