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Table 3 The association between migrant status and CS rates

From: Association between migration status and caesarean section delivery based on a modified Robson classification in China

The adjusted variables CSMR vs vaginal birth   MICS vs vaginal birth
Residents Migrants
RR (95%CI)
p Residents Migrants
RR (95%CI)
p
All subjects (n = 40,621)
 Crude a Ref 0.664 (0.627,0.704) < 0.001 Ref 0.776 (0.739,0.815) < 0.001
 Adjusted for maternal age at delivery Ref 0.774 (0.747,0.802) 0.002 Ref 0.824 (0.783,0.867) < 0.001
 Adjusted for ethnicity Ref 0.753 (0.725,0.779) < 0.001 Ref 0.774 (0.737,0.813) < 0.001
 Adjusted for health insurance Ref 0.755 (0.727,0.785) < 0.001 Ref 0.706 (0.671,0.743) 0.001
 Adjusted for occupation Ref 0.747 (0.726,0.780) 0.004 Ref 0.773 (0.736,0.812) 0.003
 Adjusted for adverse health conditions b Ref 0.668 (0.631,0.708) 0.001 Ref 0.787 (0.749,0.827) < 0.001
 Adjusted for all above variables Ref 0.697 (0.657,0.740) 0.002 Ref 0.770 (0.731,0.812) < 0.001
Subjects of Group 1 based on Robson Classification(n = 13,616)
 Crude a Ref 0.742 (0.605,0.910) 0.004 Ref 0.885 (0.699,1.120) 0.308
 Adjusted for maternal age at delivery Ref 0.769 (0.626,0.945) 0.012 Ref 0.873 (0.690,1.105) 0.259
 Adjusted for ethics Ref 0.735 (0.598,0.902) 0.003 Ref 0.886 (0.700,1.123) 0.318
 Adjusted for health insurance Ref 0.730 (0.594,0.896) 0.003 Ref 0.878 (0.693,1.112) 0.281
 Adjusted for occupation Ref 0.737 (0.601,0.905) 0.004 Ref 0.877 (0.693,1.110) 0.275
 Adjusted for adverse health conditions b Ref 0.744 (0.607,0.914) 0.024 Ref 0.718 (0.564,0.913) 0.043
 Adjusted for all above variables Ref 0.728 (0.580,0,915) 0.009 Ref 0.767 (0.602,0.978) 0.024
  1. a Not adjusted for any variables
  2. b Having one or more adverse health conditions (these conditions were not (or not severe enough to be) absolute contraindications to vaginal delivery)