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Table 2 Univariate logistic regression analysis of variables associated with CS

From: Utilization of antenatal ultrasound scan and implications for caesarean section: a cross-sectional study in rural Eastern China

Variables Crude OR OR 95% CI Pvalue
Maternal education level (years)* 1.060 1.032-1.088 < 0.001
Husband education level (years)* 1.069 1.031-1.109 < 0.001
Maternal age (24-31 y as control)    
≤ 23 y 0.830 0.680-1.103 0.067
≥ 32 y 1.058 0.868-1.290 0.576
Family annual income (≤ 3000 yuan as control)    
3001-7499 yuan 1.316 1.091-1.586 0.004
≥ 7500 yuan 1.388 1.092-1.763 0.007
Antenatal care#    
No - - -
Yes 1.356 1.142-1.611 0.001
Antenatal ultrasound scans (frequencies)*& 1.342 1.265-1.423 < 0.001
Pregnancy complications    
No - - -
Yes 1.601 1.308-1.961 < 0.001
Previous adverse pregnant outcomes    
No - - -
Yes 1.726 1.232-2.417 0.001
Primiparity    
No - - -
Yes 1.241 1.042-1.479 0.016
Preterm deliveries    
No - - -
Yes 0.865 0.615-1.218 0.407
Large for date infants    
No - - -
Yes 0.875 0.663-1.154 0.343
  1. * continuous variables
  2. # Antenatal care refers to antenatal check-up during the 1st trimester of pregnancy plus 4 times during 2nd and 3 rd trimesters, ie, at least 5 antenatal visits during pregnancy
  3. &Antenatal ultrasound scans means the frequencies that women had ultrasound scans during the index pregnancy