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Table 2 Changes in risk factors from 2005 to 2017

From: Impact of childbirth policy changes on obstetric workload over a 13-year period in a regional referral center in China – implications on service provision planning

Year Prior CS Previous TOP ≥ 3 Pre-gestational diabetes Chronic hypertension Preterm birth Labour induction Total CS rate ICU admission NICU admission
  (%) (%) (%) (%) (%) (%) (%) (%) (%)
2005 2.6 1.0 0.2 0.2 5.0 1.4 42.1 0.6 13.8
2006 4.4 1.2 0.4 0.1 5.9 1.2 39.0 0.6 11.4
2007 3.9 1.0 0.4 0.1 6.6 1.9 39.0 0.5 10.1
2008 3.7 0.8 0.5 0.2 6.6 2.9 39.6 0.5 14.5
2009 5.0 0.7 0.4 0.5 7.9 3.0 41.9 0.3 16.1
2010 6.1 0.9 0.3 0.8 8.3 2.4 45.2 0.5 22.1
2011 6.7 0.6 0.4 0.7 8.3 2.0 35.4 1.0 19.5
2012 7.6 0.2 0.6 0.7 7.8 13.5 32.7 0.8 12.4
2013 9.6 0.1 0.8 1.0 8.1 23.0 36.2 0.9 14.7
2014 10.7 0.8 0.6 1.0 7.7 19.6 33.2 0.8 15.5
2015 15.6 0.3 0.8 1.2 8.3 24.5 32.9 0.8 19.7
2016 17.8 3.1 0.7 1.0 8.2 14.9 25.8 0.6 22.3
2017 23.6 4.9 0.9 1.3 9.3 17.2 30.8 0.3 21.8
Difference P < 0.001 P < 0.001 P < 0.001 P < 0.001 P < 0.001 P < 0.001 P < 0.001 P < 0.001 P < 0.001
Correlation P < 0.001 P < 0.001 P < 0.001 P < 0.001 P < 0.001 P < 0.001 P < 0.001 P = 0.605 P < 0.001
  1. Results expressed in N (%), comparison of difference by χ2 test, correlation analysis by Spearman’s test; CS caesarean section, TOP therapeutic termination of pregnancy