. 2018 Jun 8;131(1476):24-39.

The New Zealand PIPER Project: colorectal cancer survival according to rurality, ethnicity and socioeconomic deprivation-results from a retrospective cohort study

Katrina J Sharples¹, Melissa J Firth², Victoria A Hinder³, Andrew G Hill⁴, Mark Jeffery⁵, Diana Sarfati⁶, Charis Brown⁷, Carol Atmore⁸, Ross A Lawrenson⁹, Papaarangi Mj Reid¹⁰, Sarah L Derrett¹¹, Jerome Macapagal¹², John P Keating¹³, Adrian H Secker¹⁴, Charles De Groot¹⁵, Christopher Gca Jackson¹⁶, Michael Pn Findlay¹⁷

Affiliations

¹ Associate Professor of Biostatistics, Department of Mathematics and Statistics and Department of Medicine, University of Otago, Dunedin.
² Project Manager, Discipline of Oncology, University of Auckland, Auckland.
³ Research Fellow/Biostatistician, Discipline of Oncology, University of Auckland, Auckland.
⁴ Consultant Colorectal Surgeon, Counties Manukau DHB and Professor, South Auckland Clinical School, University of Auckland, Auckland.
⁵ Consultant Medical Oncologist, Canterbury District Health Board, Christchurch.
⁶ Professor and Co-Head of Department, Department of Public Health, University of Otago, Wellington.
⁷ Senior Research Fellow, National Institute of Demographic and Economic Analysis, The University of Waikato, Waikato.
⁸ Foxley Fellow, Department of General Practice and Rural Health, University of Otago, Dunedin.
⁹ Professor of Population Health, National Institute of Demographic and Economic Analysis, the University of Waikato, Waikato.
¹⁰ Associate Professor and Tumuaki, Te Kupenga Hauora Māori, University of Auckland, Auckland.
¹¹ Associate Professor, Public Health (Health Systems and Public Policy) and Director - Injury Prevention Research Unit, Department of Preventive and Social Medicine, University of Otago, Dunedin.
¹² Database Development Officer, Discipline of Oncology, University of Auckland, Auckland.
¹³ Consultant Colorectal Surgeon, Capital and Coast District Health Board and Clinical Senior Lecturer, Wellington School of Medicine, University of Otago, Wellington.
¹⁴ Consultant Colorectal Surgeon, Nelson-Marlborough District Health Board, Nelson.
¹⁵ Consultant Radiation Oncologist and Clinical Director, Radiation Oncology, Waikato District Health Board, Waikato.
¹⁶ Consultant Medical Oncologist, Southern District Health Board and Senior Lecturer, Dunedin School of Medicine, University of Otago, Dunedin.
¹⁷ Consultant Medical Oncologist, Auckland DHB; Professor of Oncology, University of Auckland; Director Cancer Trials New Zealand, Auckland.

PMID: 29879724

The New Zealand PIPER Project: colorectal cancer survival according to rurality, ethnicity and socioeconomic deprivation-results from a retrospective cohort study

Katrina J Sharples et al. N Z Med J. 2018.

. 2018 Jun 8;131(1476):24-39.

Authors

Affiliations

¹ Associate Professor of Biostatistics, Department of Mathematics and Statistics and Department of Medicine, University of Otago, Dunedin.
² Project Manager, Discipline of Oncology, University of Auckland, Auckland.
³ Research Fellow/Biostatistician, Discipline of Oncology, University of Auckland, Auckland.
⁴ Consultant Colorectal Surgeon, Counties Manukau DHB and Professor, South Auckland Clinical School, University of Auckland, Auckland.
⁵ Consultant Medical Oncologist, Canterbury District Health Board, Christchurch.
⁶ Professor and Co-Head of Department, Department of Public Health, University of Otago, Wellington.
⁷ Senior Research Fellow, National Institute of Demographic and Economic Analysis, The University of Waikato, Waikato.
⁸ Foxley Fellow, Department of General Practice and Rural Health, University of Otago, Dunedin.
⁹ Professor of Population Health, National Institute of Demographic and Economic Analysis, the University of Waikato, Waikato.
¹⁰ Associate Professor and Tumuaki, Te Kupenga Hauora Māori, University of Auckland, Auckland.
¹¹ Associate Professor, Public Health (Health Systems and Public Policy) and Director - Injury Prevention Research Unit, Department of Preventive and Social Medicine, University of Otago, Dunedin.
¹² Database Development Officer, Discipline of Oncology, University of Auckland, Auckland.
¹³ Consultant Colorectal Surgeon, Capital and Coast District Health Board and Clinical Senior Lecturer, Wellington School of Medicine, University of Otago, Wellington.
¹⁴ Consultant Colorectal Surgeon, Nelson-Marlborough District Health Board, Nelson.
¹⁵ Consultant Radiation Oncologist and Clinical Director, Radiation Oncology, Waikato District Health Board, Waikato.
¹⁶ Consultant Medical Oncologist, Southern District Health Board and Senior Lecturer, Dunedin School of Medicine, University of Otago, Dunedin.
¹⁷ Consultant Medical Oncologist, Auckland DHB; Professor of Oncology, University of Auckland; Director Cancer Trials New Zealand, Auckland.

PMID: 29879724

Abstract

Aim: To investigate differences in survival after diagnosis with colorectal cancer (CRC) by rurality, ethnicity and deprivation.

Methods: In this retrospective cohort study, clinical records and National Collections data were merged for all patients diagnosed with CRC in New Zealand in 2007-2008. Prioritised ethnicity was classified using New Zealand Cancer Registry data; meshblock of residence at diagnosis was used to determine rurality and socioeconomic deprivation.

Results: Of the 4,950 patients included, 1,938 had died of CRC by May 2014. The five-year risks of death from CRC were: Māori 47%; Pacific 59%; non-Māori-non-Pacific (nMnP) 38%. After adjustment for demographic characteristics, comorbidity and disease stage at diagnosis, compared to nMnP the relative risk (RR) for Māori was 1.1 (95%CI: 0.8-1.3) and for Pacific 1.8 (95% CI: 1.4-2.5). We found no differences in risk of death from CRC by rurality, but some differences by deprivation.

Conclusions: Disparity in outcome following diagnosis with CRC exists in New Zealand. Much of this disparity can be explained by stage of disease at diagnosis for Māori, but for Pacific peoples and those in deprived areas other factors may influence outcome. Further analyses of the PIPER data will explore the impact of any differences in management.

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Conflict of interest statement

The authors disclose that the work included in this publication received funding from the Health Research Council of New Zealand and the Ministry of Health. Dr Sarah Derrett discloses reimbursement of costs to attend Bowel Cancer New Zealand meetings outside of the submitted work. There are no other conflicts of interest to declare.

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The New Zealand PIPER Project: colorectal cancer survival according to rurality, ethnicity and socioeconomic deprivation-results from a retrospective cohort study

Affiliations

The New Zealand PIPER Project: colorectal cancer survival according to rurality, ethnicity and socioeconomic deprivation-results from a retrospective cohort study

Authors

Affiliations

Abstract

Conflict of interest statement

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Medical