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Table 1 Characteristics of the study population

From: Association between parity and macrosomia in Shaanxi Province of Northwest China

Baseline characteristicsPrimiparaMultiparaP
Maternal age, yeara25.19 (3.69)29.60 (4.71)<0.001
Gestational age, weeka39.65 (1.29)39.64 (1.24)0.549
Sex of infants, n (%)
 Boy8789 (52.70)5959 (55.82)<0.001
 Girl7887 (47.30)4716 (44.18)
Season of birth, n (%)
 Spring4237 (25.41)2803 (26.26)<0.001
 Summer3878 (23.25)2669 (25.00)
 Fall4166 (24.98)2595 (24.31)
 Winter4395 (26.36)2608 (24.43)
Region, n (%)
 Central Shaanxi9513 (57.05)5367 (50.28)<0.001
 Northern Shaanxi3750 (22.49)3105 (29.09)
 Southern Shaanxi3413 (20.46)2203 (20.63)
Mother’s education, n (%)
 Primary school or less917 (5.51)2095 (19.67)<0.001
 Junior high school6992 (42.03)6524 (61.25)
 Senior high school4044 (24.31)1559 (14.64)
 College and above4683 (28.15)473 (4.44)
Residence, n (%)
 Urban area4643 (27.95)1135 (10.68)<0.001
 Rural area11,968 (72.05)9492 (89.32)
Mother’s occupation, n (%)
 Peasant/Housework8932 (53.56)8275 (77.52)<0.001
 Other7744 (46.44)2400 (22.48)
Household Wealth Index, n (%)
 Poorest3302 (22.10)2903 (29.13)<0.001
 Middle7765 (51.96)5605 (56.25)
 Richest3876 (25.94)1456 (14.62)
  1. aReported as mean and SD (standard deviation)