Table 1: Characteristics of subjects in the parity.
†
P value was calculated by student's t-test for continious variable and the chisqure test for categorical variables to test differences between the groups. Stastical significance was defined as
p.
| Nulliparas | Multiparas | |
(n = 52) | (n = 61) | P† |
Mother |
Age(Years) | 29.8±4.8 | 32.0±3.7 | 0.006 |
Prepregnancy Body Mass Index(kg/m2) | 21.3±3.1 | 21.0±3.7 | 0.61 |
Gastational weight gain(kg) | 10.2±4.3 | 9.5±3.5 | 0.35 |
Occupation (%) |
Outside work | 4602 | 2935 | 0.06 |
Housewife | 53.9 | 70.5 | |
Smoking (%) |
Never | 57.7 | 70.5 | |
Former | 40.4 | 29.5 | 0.24 |
Current | 1.9 | 0.0 | |
Infant |
Gestational weeks(w) | 39.5±1.0 | 38.9±1.3 | 0.01 |
Birth weight | 3047.1±334.0 | 3080.8±348.3 | 0.60 |