Table 5.
Multivariate Poisson model for factors associated to post‐partum depression* (n = 101)
| Variable | Unadjusted prevalence ratio | Adjusted prevalence ratio | CI 95% | P‐value |
|---|---|---|---|---|
| Age (in years) | ||||
| 18.0–19.9 | 1.00 | 1.00 | ||
| 20.0–29.9 | 1.38 | 1.21 | 0.40–3.65 | 0.730 |
| 30.0–41.0 | 1.05 | 1.03 | 0.31–3.38 | 0.961 |
| Schooling (in years) | ||||
| ≤9 | 1.94 | 1.80 | 0.89–3.65 | 0.102 |
| >9 | 1.00 | 1.00 | ||
| Pre‐pregnancy BMI (kg/m2) † | ||||
| <18.5 | 3.07 | 4.01 | 1.96–8.21 | <0.001 |
| 18.5–24.9 | 1.00 | 1.00 | ||
| ≥25.0 | 1.33 | 1.23 | 0.57–2.65 | 0.602 |
| Time elapsed since delivery (days) ‡ | 0,99 | 1.00 | 0.98–1.02 | 0.969 |
| Lipids consumption (g) [Link] , [Link] | ||||
| ≤92.0 | 1.00 | 1.00 | ||
| >92.0 | 1.70 | 1.68 | 0.88–3.20 | 0.112 |
| Omega‐6/omega‐3 ratio intake [Link] , [Link] | ||||
| ≤9:1 | 1.00 | 1.00 | ||
| >9:1 | 2.73 | 2.50 | 1.21–5.14 | 0.013 |
*Prevalence ratio and 95% confidence intervals (CIs) were estimated through Poisson regression. P‐value for Wald test. †Body mass index (BMI) classification according to the American Institute of Medicine (2009). ‡Continuous variable included on the final model. §Data from the Food Frequency Questionnaire concerning the first trimester of pregnancy.¶Five outliers for the dietary variables (values for energy intake outside the range ± 3 SD). In the multivariate model all variables are adjusted for each other.