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Author (up) Johnsen, M.B.; Winsvold, B.S.; Borte, S.; Vie, G.A.; Pedersen, L.M.; Storheim, K.; Skorpen, F.; Hagen, K.; Bjorngaard, J.H.; Asvold, B.O.; Zwart, J.A. url  doi
  Title The causal role of smoking on the risk of headache. A Mendelian randomization analysis in the HUNT study Type Journal Article
  Year 2018 Publication European Journal of Neurology Abbreviated Journal Eur J Neurol  
  Volume 25 Issue 9 Pages 1148-e102  
  Keywords *epidemiology; *genetic variants; *headache; *migraine; *smoking  
  Abstract BACKGROUND AND PURPOSE: Headache has been associated with various lifestyle and psychosocial factors, one of which is smoking. The aim of the present study was to investigate whether the association between smoking intensity and headache is likely to be causal. METHOD: A total of 58 316 participants from the Nord-Trondelag Health (HUNT) study with information on headache status were genotyped for the rs1051730 C>T single-nucleotide polymorphism (SNP). The SNP was used as an instrument for smoking intensity in a Mendelian randomization analysis. The association between rs1051730 T alleles and headache was estimated by odds ratios with 95% confidence intervals. Additionally, the association between the SNP and migraine or non-migrainous headache versus no headache was investigated. All analyses were adjusted for age and sex. RESULTS: There was no strong evidence that the rs1051730 T allele was associated with headache in ever smokers (odds ratio 0.99, 95% confidence interval 0.95-1.02). Similarly, there was no association between the rs1051730 T allele and migraine or non-migrainous headache versus no headache. CONCLUSION: The findings from this study do not support that there is a strong causal relationship between smoking intensity and any type of headache. Larger Mendelian randomization studies are required to examine whether higher smoking quantity can lead to a moderate increase in the risk of headache subtypes.  
  Address Department of Neurology, Oslo University Hospital, Oslo, Norway  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1351-5101 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:29747220 Approved no  
  Call Number HUNT @ maria.stuifbergen @ Serial 2106  
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