Population mixing and the risk of childhood leukaemia in Switzerland: a census-based cohort study.

Lupatsch, Judith E; Kuehni, Claudia E; Niggli, Felix; Ammann, Roland A; Egger, Matthias; Spycher, Ben D (2015). Population mixing and the risk of childhood leukaemia in Switzerland: a census-based cohort study. European journal of epidemiology, 30(12), pp. 1287-1298. Springer 10.1007/s10654-015-0042-5

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Childhood leukaemia (CL) may have an infectious cause and population mixing may therefore increase the risk of CL. We aimed to determine whether CL was associated with population mixing in Switzerland. We followed children aged <16 years in the Swiss National Cohort 1990-2008 and linked CL cases from the Swiss Childhood Cancer Registry to the cohort. We calculated adjusted hazard ratios (HRs) for all CL, CL at age <5 years and acute lymphoblastic leukaemia (ALL) for three measures of population mixing (population growth, in-migration and diversity of origin), stratified by degree of urbanisation. Measures of population mixing were calculated for all municipalities for the 5-year period preceding the 1990 and 2000 censuses. Analyses were based on 2,128,012 children of whom 536 developed CL. HRs comparing highest with lowest quintile of population growth were 1.11 [95 % confidence interval (CI) 0.65-1.89] in rural and 0.59 (95 % CI 0.43-0.81) in urban municipalities (interaction: p = 0.271). Results were similar for ALL and for CL at age <5 years. For level of in-migration there was evidence of a negative association with ALL. HRs comparing highest with lowest quintile were 0.60 (95 % CI 0.41-0.87) in urban and 0.61 (95 % CI 0.30-1.21) in rural settings. There was little evidence of an association with diversity of origin. This nationwide cohort study of the association between CL and population growth, in-migration and diversity of origin provides little support for the population mixing hypothesis.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Social and Preventive Medicine
04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Paediatric Medicine

Graduate School:

Graduate School for Health Sciences (GHS)

UniBE Contributor:

Lupatsch, Judith; Kühni, Claudia; Ammann, Roland; Egger, Matthias and Spycher, Ben

Subjects:

600 Technology > 610 Medicine & health
300 Social sciences, sociology & anthropology > 360 Social problems & social services

ISSN:

0393-2990

Publisher:

Springer

Language:

English

Submitter:

Doris Kopp Heim

Date Deposited:

03 Jun 2015 15:22

Last Modified:

25 Sep 2017 18:15

Publisher DOI:

10.1007/s10654-015-0042-5

PubMed ID:

26008748

BORIS DOI:

10.7892/boris.69273

URI:

https://boris.unibe.ch/id/eprint/69273

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