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Table 2 Maternal and gestational history in relation to group (symptom-free (SF), nausea only (NP), and nausea and vomiting (NVP))

From: Pregnancy complications and birth outcomes among women experiencing nausea only or nausea and vomiting during pregnancy in the Norwegian Mother and Child Cohort Study

   SF NP NVP  
n (n = 14 234) (n = 20 371) (n = 17 070)  
51 675 n (%) n (%) n (%) P valuea
High blood pressure pre-pregnancy 44 580     
No 43 089 11 938 (96.9) 17 144 (96.7) 14 007 (96.4)  
Yes 1491 380 (3.1) 581 (3.3) 530 (3.6) 0.03
Diabetes pre-pregnancy: 51 675     
No 51 424 14 138 (99.3) 20 292 (99.6) 16 994 (99.6)  
Yes 251 96 (0.7) 79 (0.4) 76 (0.4) 0.001
Para ≥1 women      
Previous stillbirths or spontaneous miscarriages 24 156     
No 17 246 3829 (72.5) 7697 (70.7) 5720 (71.6)  
Yes 6910 1449 (27.5) 3191 (29.3) 2270 (28.4) 0.045
Previous experience of pelvic girdle pain (PGP) 21 114     
No 15 128 3782 (79.4) 6948 (71.4) 4398 (66.5)  
Yes 5986 983 (20.6) 2788 (28.6) 2215 (33.5) <0.001
Previous preeclampsia 19 184     
No 17 437 4133 (91.9) 8078 (91.7) 5226 (88.9)  
Yes 1747 362 (8.1) 735 (8.3) 650 (11.1) <0.001
  1. aChi squared test