Table 4 GEE estimates of three longitudinal models for factors associated with depression during four repeat follow-ups
Longitudinal model 1 (Baseline tracking model) | Longitudinal model 2 (Time-lag model) | Longitudinal model 3 (Change model model) | ||||
|---|---|---|---|---|---|---|
Parameters | β | 95% CI | β | 95% CI | β | 95% CI |
Non-first time pregnancy vs. First time pregnancy | −0.55 | − 1.52~0.42 | − 0.09 | − 1.04~0.85 | −0.04 | − 0.57~0.49 |
Occupation (Housewife vs. Career women) | −0.07 | −1.08~0. 94 | − 0.71 | −1.61~0.19 | – | – |
Chinese herbals treatment (Yes vs. No) | 0.07 | −0.96~1.10 | 0.92 | 0.11~1.73* | – | – |
Discomfort during pregnancy (Yes vs. No) | 1.21 | 0.08~2.33* | 0.58 | −0.17~1.34 | – | – |
Time effects (reference: second trimester) | ||||||
 Third trimester | −0.15 | − 0.63~0.32 | 0.57 | − 0.22~1.37 | 0.75 | − 0.14~1.64 |
 2 months postpartum | 1.21 | 0.51~1.91*** | 1.75 | 0.78~2.72*** | 2.29 | 1.38~3.20*** |
Number of fetuses 3 | ||||||
  (reference: single) | ||||||
  Twin | −0.28 | −1.32~0.76 | 0.42 | −0.55~1.39 | ||
  ≧ Triplets | 0.42 | −0.96~1.80 | 0.85 | −0.72~2.41 | ||
Fetal reduction (reference: fetal reduction ≧2) | ||||||
  No fetal reduction | 0.27 | −2.28~2.81 | ||||
  One fetal reduction | 0.06 | −2.91~2.79 | ||||
Mother’s age (years) | −0.12 | −0.28~0.04 | −0.07 | − 0.21~0.08 | −0.03 | − 0.10~0.04 |
Duration of the marital relationship (years) | 0.15 | −0.10~0.40 | 0.18 | −0.05~0.41 | 0.11 | 0.01~0.20* |
Period of attempted conception (years) | 0.05 | −0.32~0.42 | −0.01 | − 0.35~0.34 | −0.01 | − 0.15~0.13 |
Frequency of IVF | 0.46 | −0.11~1.02 | 0.45 | −0.10~1.01 | 0.16 | −0.15~0.48 |
Number of embryos transferred | 0.42 | −0.26~1.10 | 0.54 | −0.08~1.17 | 0.19 | −0.23~0.60 |
Maternity social support | −0.50 | −0.78~ − 0.22*** | −0.30 | − 0.51~ − 0.09** | −0.44 | − 0.63~ − 0.24*** |
Pregnancy and parenting stress3 | 0.08 | 0.03~0.13** | 0.06 | 0.02~0.10** | 0.07 | 0.05~0.10*** |
Intimate relationship | ||||||
 care dimension | 0.00 | −0.11~0.10 | −0.01 | − 0.09~0.07 | 0.00 | − 0.09~0.09 |
 control dimension | −0.03 | − 0.12~0.06 | 0.03 | − 0.04~0.10 | −0.01 | − 0.09~0.07 |
Maternal fetal attachment | −0.01 | − 0.03~0.02 | 0.00 | − 0.02~0.02 | – | – |