Table 4:
Linear model results for the effect of stress (group), time (preconception, 1st trimester, 2nd trimester, 3rd trimester), and group by time on mean logHCC patterns from preconception to the 3rd trimester.
| Dependent variable LogHCC | Unadjusted Model 1 | Adjusted Model 2 a | ||
|---|---|---|---|---|
| Beta (SE) | P | Beta (SE) | P | |
| Time (all participants) | 0.36 (0.03) | <0.0001 | 0.36 (0.03) | <0.0001 |
| Difficulty Paying for Basics | ||||
| Group | 0.19 (0.14) | 0.18 | 0.07 (0.13) | 0.57 |
| Time | 0.36 (0.03) | <0.0001 | 0.36 (0.03) | <0.0001 |
| Group x Timeb | - | - | - | 0.68 |
| Education ≤ 12 years | ||||
| Group | 0.40 (0.13) | 0.003 | 0.32 (0.13) | 0.01 |
| Time | 0.36 (0.03) | <0.0001 | 0.36 (0.03) | <0.0001 |
| Group x Time | - | - | - | 0.63 |
| Unemployment | ||||
| Group | −0.04 (0.14) | 0.77 | -0.10 (0.13) | 0.45 |
| Time | 0.36 (0.03) | <0.0001 | 0.36 (0.03) | <0.0001 |
| Group x Time | - | - | - | 0.34 |
| Self-reported Fair or Poor Health | ||||
| Group | 0.06 (0.15) | 0.70 | −0.01 (0.14) | 0.96 |
| Time | 0.36 (0.03) | <0.0001 | 0.36 (0.03) | <0.0001 |
| Group x Time | - | - | - | 0.16 |
| History of Physical or Sexual CA | ||||
| Group | 0.06 (0.15) | 0.72 | 0.04 (0.14) | 0.78 |
| Time | 0.36 (0.03) | <0.0001 | 0.36 (0.03) | <0.0001 |
| Group x Time | - | - | - | 0.31 |
| History of IPV | ||||
| Group | −0.05 (0.18) | 0.77 | −0.09 (0.17) | 0.62 |
| Time | 0.36 (0.03) | <0.0001 | 0.36 (0.03) | <0.0001 |
| Group x Time | - | - | - | 0.31 |
| Perceived stress score > median | ||||
| Group | −0.29 (0.13) | 0.04 | −0.28 (0.12) | 0.02 |
| Time | 0.36 (0.03) | <0.0001 | 0.36 (0.03) | <0.0001 |
| Group x Time | - | - | - | 0.23 |
| Depression (1 missing) | ||||
| Group | −0.11 (0.16) | 0.48 | −0.14 (0.15) | 0.34 |
| Time | 0.36 (0.03) | <0.0001 | 0.36 (0.03) | <0.0001 |
| Group x Time | - | - | - | 0.09 |
| Generalized Anxiety Disorder | ||||
| Group | −0.20 (0.14) | 0.16 | −0.17 (0.13) | 0.22 |
| Time | 0.36 (0.03) | <0.0001 | 0.36 (0.03) | <0.0001 |
| Group x Time | - | - | - | 0.02 |
| Post-traumatic stress disorder | ||||
| Group | 0.19 (0.17) | 0.26 | 0.20 (0.16) | 0.22 |
| Time | 0.36 (0.03) | <0.0001 | 0.36 (0.03) | <0.0001 |
| Group x Time | - | - | - | 0.39 |
Abbreviations: SE= standard error, CA= child abuse, and IPV= intimate partner violence
a
= Adjusted for BMI (continuous), asthma, alcohol consumption, hair structure, chemical hair treatment, and UV exposure in early pregnancy.
b
= All group by time interactions were evaluated in models separately from the main effects of group and time