caa a22 4500 388058811 CHVBK 20180307125114.0 cr unu---uuuuu 161130e19980401xx s 000 0 eng 10.1375/twin.1.2.71 doi S1369052300000258 pii (NATIONALLICENCE)cambridge-10.1375/twin.1.2.71 A factor analysis of associations among self-reported immune related symptoms in a large twin sample [Elektronische Daten] We examined the cumulative prevalences of 22 symptoms thought to reflect immune system function reported in a questionnaire mailed to 7616 Australian twins. The associations between symptoms and demographic variables were expressed in terms of polychoric or polyserial correlations, and a principal components analysis performed. Factors representing underlying propensities respectively to allergic disease, various minor infections, diseases associated with aging such as arthritis, skin disease, and respiratory tract infection were extracted. Possible processes underlying these symptom clusters and the relative strengths and weaknesses of this type of analysis are discussed. Copyright © Cambridge University Press 1998 allergy nationallicence epidemiology nationallicence questionnaires nationallicence Duffy David L. Epidemiology Unit, Queensland Institute of Medical Research, Brisbane. davidD@qimr.edu.au Battistutta Diana Epidemiology Unit, Queensland Institute of Medical Research, Brisbane. Mathews John D. Menzies School of Health Research, Darwin, Australia. Martin Nicholas G. Epidemiology Unit, Queensland Institute of Medical Research, Brisbane. Twin Research Cambridge University Press 1/2(1998-04-01), 71-77 1369-0523 1:2<71 1998 1 THG https://doi.org/10.1375/twin.1.2.71 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1375/twin.1.2.71 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Duffy David L. Epidemiology Unit, Queensland Institute of Medical Research, Brisbane. davidD@qimr.edu.au NATIONALLICENCE 700 1- Battistutta Diana Epidemiology Unit, Queensland Institute of Medical Research, Brisbane NATIONALLICENCE 700 1- Mathews John D. Menzies School of Health Research, Darwin, Australia NATIONALLICENCE 700 1- Martin Nicholas G. Epidemiology Unit, Queensland Institute of Medical Research, Brisbane NATIONALLICENCE 773 0- Twin Research Cambridge University Press 1/2(1998-04-01), 71-77 1369-0523 1:2<71 1998 1 THG CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge