Table 1. Sample and Group Characteristics and Tests for Group Differences.
| Total sample M (SD)/% (N=73) | nPPD group M (SD)/% (n=59) | rPPD group M (SD)/% (n=14) | Test between nPPD and rPPD P-value | |
|---|---|---|---|---|
| Maternal age (years) | 31.05 (4.70) | 31.22 (4.69) | 30.36 (4.88) | 0.541a |
| Income category | 0.928b | |||
| Low | 8.70 | 8.90 | 7.70 | |
| Average/high | 73.90 | 73.20 | 76.90 | |
| Very high | 17.40 | 17.90 | 15.40 | |
| Pre-pregnancy BMI | 22.31 (3.47) | 22.10 (3.26) | 23.32 (4.40) | 0.292a |
| Parity | ||||
| Primiparae | 74.0 | 71.20 | 85.70 | |
| Multiparae | 26.0 | 28.80 | 14.30 | |
| Length of gestation (weeks) | 39.6 (1.2) | 39.7 (1.1) | 39.1 (1.4) | 0.044a |
| Birth mode | ||||
| Cesarean section | 23.3 | 23.70 | 21.40 | |
| Mother is nursing | 90.0 | 89.7 | 92.3 | |
| Infant birth weight (g) | 3338.56 (378.44) | 3345.93 (359.21) | 3307.50 (465.02) | 0.735a |
| Infant sex | ||||
| Female | 46.6 | 50.8 | 28.6 | |
| Male | 53.4 | 49.2 | 71.4 | |
Monthly income categories low=0–3750 swiss franks, average/high=3750–11250 swiss franks, very high=above 11250 swiss franks; nPPD=no risk for postpartum depression; rPPD=at risk for postpartum depression; BMI=body mass-index.
a
t-test.
b
χ2-test