Kruskal-Wallis tests for change in PC1 between low-symptom and high-symptom groups
| Predictor | Group 1 | Group 2 | H | P value |
| Recent life stress | Mild/moderate (155) | High (65) | 0.487 | 0.485 |
| Pregnancy negative life events | Low (112) | High (111) | 2.990 | 0.084 |
| State anxiety | Low (126) | High (96) | 0.810 | 0.369 |
| Trait anxiety | Low (104) | High (118) | 6.565 | 0.010 |
| Depression symptoms | High (118) | Low (104) | 5.001 | 0.025 |
| PTSD symptoms | High (75) | Low (142) | 0.594 | 0.441 |
PC1, principal component 1; PTSD, post-traumatic state disorder.