Maternal smoking and risk of hypertrophic infantile pyloric stenosis: 10 year population based cohort study

Sørensen, Henrik Toft professor
Nørgård, Bente senior registrar
Pedersen, Lars biostatistician
Larsen, Helle research fellow
Johnsen, Søren Paaske research fellow

¹Department of Clinical Epidemiology, Aarhus University Hospital, 8000 Aarhus C, Denmark, ²Department of Gynaecology and Obstetrics, Aalborg Hospital, 9000 Aalborg, Denmark

Accepted for publication 22 April 2002

Contributors: HTS had the idea for the study. He discussed the idea and study design with all coauthors. BN, HL, LP, and SPJ retrieved and validated the data, and HTS and LP did the statistical analysis. HTS wrote the first draft, and all authors contributed to the final paper. HTS is the guarantor.

Correspondence to: H T Sørensen [email protected].

Funding: Western Danish Research Forum for Health Sciences.

Competing interests: None declared.

BMJ 325(7371):p 1011-1012, November 2, 2002.