PMID- 9351592 OWN - NLM STAT- MEDLINE DCOM- 19971106 LR - 20090929 IS - 1073-449X (Print) IS - 1073-449X (Linking) VI - 156 IP - 4 Pt 2 DP - 1997 Oct TI - Epidemiological study of the genetics and environment of asthma, bronchial hyperresponsiveness, and atopy: phenotype issues. PG - S123-9 AB - The Epidemiological Study of the Genetics and Environment of Asthma (EGEA) combined a case-control study and a family study. The total sample of 1,854 consisted of 348 patients with asthma selected through chest clinics and 416 control subjects and nuclear families ascertained through the cases. The protocol included standardized questionnaires, bronchial responsiveness, allergen skin-prick tests according to international protocols, total serum immunoglobulin E (IgE) level measurements, and blood eosinophilia. Criteria used to select subjects with asthma and determine asthma status of relatives for affected sibling pair linkage analysis are described. Based on figures from the 348 asthma cases of the EGEA study, issues relative to the definition of severe asthma and intermediate phenotypes such as bronchial responsiveness and allergic markers are discussed. Given the phenotypic heterogeneity involved, relevant phenotypes that may lead to the detection of genetic factors will depend on the hypothesis tested. Standardization of primary data and subphenotypes is a prerequisite for pooling data, which will be needed in the future to better understand the genetics and environmental factors of asthma. FAU - Kauffmann, F AU - Kauffmann F AD - INSERM U169, Villejuif, France. FAU - Dizier, M H AU - Dizier MH FAU - Pin, I AU - Pin I FAU - Paty, E AU - Paty E FAU - Gormand, F AU - Gormand F FAU - Vervloet, D AU - Vervloet D FAU - Bousquet, J AU - Bousquet J FAU - Neukirch, F AU - Neukirch F FAU - Annesi, I AU - Annesi I FAU - Oryszczyn, M P AU - Oryszczyn MP FAU - Lathrop, M AU - Lathrop M FAU - Demenais, F AU - Demenais F FAU - Lockhart, A AU - Lockhart A FAU - Feingold, J AU - Feingold J LA - eng GR - Wellcome Trust/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Respir Crit Care Med JT - American journal of respiratory and critical care medicine JID - 9421642 SB - IM MH - Adolescent MH - Adult MH - Aged MH - Asthma/epidemiology/*genetics/physiopathology MH - Bronchial Hyperreactivity/epidemiology/*genetics MH - Case-Control Studies MH - Child MH - Family MH - Female MH - France/epidemiology MH - Humans MH - Hypersensitivity/epidemiology/*genetics MH - Male MH - Middle Aged MH - Phenotype MH - Severity of Illness Index EDAT- 1997/11/14 00:00 MHDA- 1997/11/14 00:01 CRDT- 1997/11/14 00:00 PHST- 1997/11/14 00:00 [pubmed] PHST- 1997/11/14 00:01 [medline] PHST- 1997/11/14 00:00 [entrez] AID - 10.1164/ajrccm.156.4.12tac9 [doi] PST - ppublish SO - Am J Respir Crit Care Med. 1997 Oct;156(4 Pt 2):S123-9. doi: 10.1164/ajrccm.156.4.12tac9.