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Table 2 Previous and/or current diseases and conditions

From: Effect of maternal stress during pregnancy on the risk for preterm birth

  Index group Control group  
N % N % P-value**
Index vs. Control
Chronic disease/condition      0.882
 Yes 27 16.9 27 15.7  
 No 133 83.1 145 84.3  
Conization      0.308
 Yes 10 6.3 6 3.5  
 No 150 93.8 166 96.5  
Previous psychiatric diagnosis      0.416
 Yes 18 11.3 25 14.5  
 No 142 88.8 147 85.5  
Previous preterm delivery      <0.000
 Yes 25 15.9 4 2.4  
 No 132 84.1 163 97.6  
  1. *Fisher’s exact test
  2. **P-value for Person’s x2-test