Abbreviations
aOR: Adjusted odds ratio; BMI: Body mass index; CI: Confidence interval;
cOR: Crude odds ratio; hCG: Human chorionic gonadotropin; HG: Hyperemesis
gravidarum; MBRN: Medical birth registry of Norway; mmHG: Millimetre of
mercury; MoBa: The Norwegian Mother and Child Cohort Study; NP: Nausea
only; NVP: Nausea and vomiting in pregnancy; PGP: Pelvic girdle pain;
Q1-4: Questionnaire number; SD: Standard deviations; SF: Symptom-free;
SGA: Small for gestational age.
Competing interests
The authors declare that they have no competing interests.