title: Influence of alcohol consumption on serum immunoglobulin E levels in atopic and nonatopic adults.
abstract: BACKGROUND
  Total and specific serum immunoglobulin E (IgE) are routinely used as diagnostic tools in allergy clinics. Several studies have demonstrated an increase of total serum IgE concentrations in alcoholics, but the possible influence of lower quantities of ethanol intake on serum IgE values has not been fully evaluated. This study was aimed at analyzing the influence of alcohol intake on both total and specific serum IgE concentrations in patients studied in an allergy clinic.
  
  
  METHODS
  A total of 460 patients were included in the study. According to skin-prick tests to common aeroallergens, 325 were classified as atopics and 135 as nonatopics. Most atopic patients (253; 78%) were allergic to mites. Alcohol consumption was recorded as the number of standard (10-g) drinking units regularly consumed per week. Two hundred subjects (43%) were abstainers, and 260 (57%) were regular consumers of a median of 30 g of alcohol per week. Total serum IgE was measured in all patients by latex-enhanced nephelometry. Serum-specific IgE was assayed by fluoroenzymeimmunoassay.
  
  
  RESULTS
  Total serum IgE increased along with ethanol consumption. On multivariate analysis, regular alcohol consumption greater than 70 g per week was associated with increased total serum IgE levels, even when adjusting for age, sex, atopy, and smoking. Among house-dust mite-allergic patients, specific serum IgE values against the house dust mite Dermatophagoides pteronyssinus were higher in regular alcohol consumers than in abstainers. This difference was not observed among patients allergic to grass pollen (Lolium perenne).
  
  
  CONCLUSIONS
  Alcohol consumption, even in moderate quantities, is associated with increased total and specific IgE concentrations in subjects studied in an allergy clinic. Alcohol intake should be taken into account in epidemiological studies of total serum IgE levels.
authors.affiliation: Department of Allergy, Complejo Hospitalario Universitario de Santiago, Santiago, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Vidal
authors.forename: M
authors.initials: M
authors.lastname: Armisén
authors.forename: M J
authors.initials: MJ
authors.lastname: Domínguez-Santalla
authors.forename: F
authors.initials: F
authors.lastname: Gude
authors.forename: S
authors.initials: S
authors.lastname: Lojo
authors.forename: A
authors.initials: A
authors.lastname: González-Quintela
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000428:Alcohol Drinking / Q000097:blood*; D016009:Chi-Square Distribution; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D006969:Hypersensitivity, Immediate / Q000276:immunology*; D007073:Immunoglobulin E / Q000097:blood*; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D018709:Statistics, Nonparametric
chemical_list: D007073:Immunoglobulin E