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Table 1 Distribution of characteristics among participants

From: The second pregnancy has no effect in the incidence of macrosomia: a cross-sectional survey in two western Chinese regions

Variables Pregnant women in their first pregnancy (n, %) Pregnant women in their second pregnancy (n, %) χ2/t p value
Nationality
 Han 1020 (93.2) 464 (92.1)   
 Minority 74 (6.8) 40 (7.9) 0.716 0.398
Maternal age (years)    2.207 0.027*
Single-child
 Yes 354 (32.4) 103 (20.4)   
 No 740 (67.6) 401 (79.6) 24.016 0.000***
Marital status
 Unmarried 9 (0.8) 3 (0.6)   
 Married 1078 (98.5) 498 (98.8)   
 Divorced or widowhood 7 (0.7) 3 (0.6)   
Education level
 Basic 116 (10.6) 81 (16.1)   
 Secondary 102 (9.3) 54 (10.7)   
 Higher 876 (80.1) 369 (73.2) 11.136 0.004**
Location
 Lanzhou 863 (78.9) 389 (77.2)   
 Chongqing 231 (21.1) 115 (22.8) 0.589 0.443
Residence
 Urban 951 (86.9) 444 (88.1)   
 Rural 143 (13.1) 60 (11.9) 0.623 0.515
The per capita income of the family
 < 4500¥ 450 (41.1) 208 (41.2)   
 4500¥ to 9000¥ 506 (46.3) 214 (42.5)   
 > 9000¥ 133 (12.6) 82 (16.3) 5.424 0.066
  1. *p < 0.05; **p < 0.01; ***p < 0.0001