Table 1.
Nulliparous (N = 176) | Pregnant (N = 69) | Breastfeeding (N = 60) | Parous (N = 87) | Total (N = 392) | P-value | |
---|---|---|---|---|---|---|
Age (years) | ||||||
Mean (SD) | 21.65 (0.35) | 21.66 (0.33) | 21.72 (0.32) | 21.67 (0.36) | 21.67 (0.35) | 0.636a |
Range | 20.84–22.44 | 20.90–22.42 | 21.05–22.47 | 20.88–22.40 | 20.84–22.47 | |
Gravidity | ||||||
Mean (SD) | 0 (0) | 1.83 (1.07) | 1.73 (0.76) | 1.41 (0.69) | 0.9 (1.04) | <0.001a |
Range | 0–0 | 1–5 | 1–4 | 1–4 | 0–5 | |
SES-score | ||||||
Mean (SD) | 0.05 (1.35) | −0.50 (1.31) | −0.38 (1.50) | −0.34 (1.41) | −0.20 (1.40) | 0.013a |
Range | −2.75 to 3.95 | −2.75 to 3.19 | −3.27 to 3.81 | −3.10 to 3.90 | −3.27 to 3.95 | |
Genetic PC-score 1 | ||||||
Mean (SD) | 0.16 (9.01) | −0.42 (8.82) | 1.93 (7.55) | 0.10 (7.75) | 0.32 (8.50) | 0.423a |
Range | −19.94 to 24.04 | −21.15 to 15.84 | −12.54 to 22.85 | −24.95 to 18.70 | −24.95 to 24.04 | |
Genetic PC-score 2 | ||||||
Mean (SD) | −0.20 (8.06) | 0.46 (7.93) | −0.30 (7.47) | 0.91 (6.94) | 0.15 (7.70) | 0.681a |
Range | −20.48 to 20.33 | −17.07 to 17.50 | −15.41 to 17.56 | −17.92 to 19.17 | −20.48 to 20.33 | |
Smoking status (1 = ‘yes’) | ||||||
Number (%) | 3 (2%) | 0 | 0 | 7 (8%) | 10 (3%) | 0.007b |
More details on the derivation of the socioeconomic status composite score (SES-score) and the genetic principal components (genetic PC-scores 1 and 2) can be found in the supplementary material.
Linear model ANOVA.
Fisher’s exact test for count data.