- Self-reported smoking status and plasma cotinine concentrations among pregnant women in the Norwegian Mother and Child Cohort StudyLiv G Kvalvik
Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway
Pediatr Res 72:101-7. 2012..In this prospective study, we validated self-reported tobacco use against nicotine exposure assessed by plasma cotinine in the Norwegian Mother and Child Cohort Study (MoBa)...
- Smoking during pregnancy from 1999 to 2004: a study from the Medical Birth Registry of NorwayLiv Grimstvedt Kvalvik
Section for Social Medicine, University of Bergen, Norway
Acta Obstet Gynecol Scand 87:280-5. 2008..We wanted to investigate whether there was a general decline in smoking habits among pregnant women. We also wanted to identify population subgroups with diverging trends...