Missing data on body mass index in a breast cancer register: how is it associated with patient characteristics and clinical outcomes?

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dc.contributor.author Tin Tin, Sandar en
dc.contributor.author Elwood, James en
dc.contributor.author Lawrenson, R en
dc.contributor.author Campbell, Ian en
dc.date.accessioned 2017-07-18T21:24:26Z en
dc.date.issued 2017-03-03 en
dc.identifier.citation New Zealand Medical Journal 130(1451):21-29 03 Mar 2017 en
dc.identifier.issn 0028-8446 en
dc.identifier.uri http://hdl.handle.net/2292/34293 en
dc.description.abstract To assess the completeness of data on body mass index (BMI) in a regional breast cancer register, and its association with patient characteristics and clinical outcomes.This analysis used the data from the Waikato Breast Cancer Register and involved all women who were diagnosed with primary breast cancer in the Waikato District Health Board Region between January 2000 and June 2014. Patients with recorded BMI were compared with those with missing data in terms of demographics, disease factors and treatment factors. Cox regression modelling was performed, and hazards of specific outcomes associated with missing data on BMI were assessed.Of the 3,536 patients included in this analysis, 27.4% had missing data on BMI. Missing data was more frequent in older patients, rural dwellers, patients with comorbidities, screen detected patients, patients with early stage or low grade cancer and hormone receptor positive patients, but was minimal in patients who received chemotherapy. Patients with missing data were less likely to experience loco-regional recurrence (although not significant), metastasis and breast cancer specific mortality, but more likely to experience death from other causes even after demographic, disease and treatment factors were adjusted.Height or weight or both were not recorded for more than one quarter of the patients. Missing data was differential by specific patient characteristics and clinical outcomes. en
dc.format.medium Electronic en
dc.language eng en
dc.publisher New Zealand Medical Association en
dc.relation.ispartofseries New Zealand Medical Journal en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher.Details obtained from http://www.sherpa.ac.uk/romeo/issn/0028-8446/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.subject Humans en
dc.subject Breast Neoplasms en
dc.subject Body Weight en
dc.subject Body Mass Index en
dc.subject Body Height en
dc.subject Treatment Outcome en
dc.subject Registries en
dc.subject Proportional Hazards Models en
dc.subject Adult en
dc.subject Aged en
dc.subject Aged, 80 and over en
dc.subject Middle Aged en
dc.subject New Zealand en
dc.subject Female en
dc.title Missing data on body mass index in a breast cancer register: how is it associated with patient characteristics and clinical outcomes? en
dc.type Journal Article en
pubs.issue 1451 en
pubs.begin-page 21 en
pubs.volume 130 en
dc.description.version VoR - Version of Record en
dc.rights.holder Copyright: New Zealand Medical Association en
dc.identifier.pmid 28253241 en
pubs.author-url https://www.nzma.org.nz/journal/read-the-journal/all-issues/2010-2019/2017/vol-130-no-1451-3-march-2017/7173 en
pubs.end-page 29 en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Article en
pubs.elements-id 615736 en
pubs.org-id Medical and Health Sciences en
pubs.org-id Population Health en
pubs.org-id Epidemiology & Biostatistics en
pubs.org-id School of Medicine en
pubs.org-id Surgery Department en
dc.identifier.eissn 1175-8716 en
pubs.record-created-at-source-date 2017-07-19 en
pubs.dimensions-id 28253241 en

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