Table 1 Characteristics of the participants in the Persian birth cohort study across categories of the dietary inflammatory index
Variable | Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | P |
|---|---|---|---|---|---|
Age (years) | 28.3 ± 5.10 | 28.4 ± 5.02 | 28.3 ± 4.87 | 29.8 ± 5.05 | 0.02 |
Prepregnancy BMI (kg/m2) | 25.5 ± 4.54 | 24.9 ± 4.47 | 25.4 ± 4.45 | 24.1 ± 4.06 | 0.01 |
Weight gain during current pregnancy (kg) | 13.2 ± 5.36 | 13.5 ± 4.83 | 13.4 ± 5.16 | 13.7 ± 4.49 | 0.80 |
Having job with income (%) | 28.1 | 24.7 | 22.5 | 24.7 | 0.63 |
University graduate (%) | 4.5 | 4.4 | 5.8 | 4.4 | 0.23 |
Physical activity | Â | Â | Â | Â | 0.60 |
Low (%) | 24.5 | 24.7 | 26.3 | 24.5 | Â |
Moderate (%) | 26.1 | 26.1 | 20.9 | 26.8 | Â |
History of CVD (%) | 28.6 | 14.3 | 28.6 | 28.6 | 0.93 |
History of hypertension (%) | 14.3 | 28.6 | 35.7 | 21.4 | 0.69 |
History of hypothyroidism (%) | 21.6 | 30.6 | 20.7 | 27.0 | 0.32 |
History of hyperthyroidism (%) | 14.3 | 14.3 | 28.6 | 42.9 | 0.66 |
Order of pregnancy (≥ 3, %) | 20.8 | 17.6 | 16.3 | 22.7 | 0.21 |
Nausea during current pregnancy (%) | 30.1 | 24.8 | 21.7 | 23.3 | 0.01 |
Multivitamin use during pregnancy (%) | 22.9 | 41.4 | 14.3 | 21.4 | 0.006 |