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Table 4 Bivariate logistic regression analysis of factors that affect delivery involving fetal macrosomia

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

Variables   B χ2 p value OR (95% Cl)
Parity
 Pregnant women in their first pregnancy 1094 (68.5)     1
 Pregnant women in their second pregnancy 504 (31.5) − 0.048 0.053 0.818 0.9 (0.6,1.4)
Maternal age
  < 30 939 (58.8)     1
  ≥ 30 659 (41.2) − 0.515 5.963 0.015* 0.6 (0.4,0.9)
Maternal height
  < 1.60 495 (31.0)     
  ≥ 1.60 1103 (69.0)     
Maternal BMI
  < 30 1547 (96.8)     1
  ≥ 30 51 (3.2) 0.747 3.029 0.082 2.1 (0.9, 4.9)
Gestational diabetes mellitus
 Yes 57 (3.6) 0.180 0.138 0.710 1.2 (0.5, 3.1)
 No 1541 (96.4)     1
Gestational hypertension
 Yes 72 (4.5) 0.582 2.376 0.123 1.8 (0.9, 3.8)
 No 1526 (95.5)     1
Physical activity time (daily)
  < 30 min 1282 (80.2) 0.449 2.585 0.108 1.6 (0.9, 2.7)
  ≥ 30 min 316 (19.8)     1
Fetal gender
 Male 855 (53.5)     1
 Female 743 (46.5) − 0.028 0.020 0.888 1.0 (0.7, 1.4)
  1. *p < 0.05. BMI body mass index, OR odds ratio, CI confidence interval
  2. Maternal BMI refers to the last weight recorded before delivery