Kevin Dew

Survival disparities in Indigenous and non-Indigenous New Zealanders with colon cancer: the role of patient comorbidity, treatment and health service factors

Background Ethnic disparities in cancer survival have been documented in many populations and cancer types. The causes of these inequalities are not well understood but may include disease and patient characteristics, treatment differences and health service factors. Survival was compared in a cohort of Maori (Indigenous) and non-Maori New Zealanders with colon cancer, and the contribution of demographics, disease characteristics, patient comorbidity, treatment and healthcare factors to survival disparities was assessed. Methods Maori patients diagnosed as having colon cancer between 1996 and 2003 were identified from the New Zealand Cancer Registry and compared with a randomly selected sample of non-Maori patients. Clinical and outcome data were obtained from medical records, pathology reports and the national mortality database. Cancer-specific survival was examined using Kaplan–Meier survival curves and Cox hazards modelling with multivariable adjustment. Results 301 Maori and 328 non-Maori patients with colon cancer were compared. Maori had a significantly poorer cancer survival than non-Maori (hazard ratio (HR)=1.33, 95% CI 1.03 to 1.71) that was not explained by demographic or disease characteristics. The most important factors contributing to poorer survival in Maori were patient comorbidity and markers of healthcare access, each of which accounted for around a third of the survival disparity. The final model accounted for almost all the survival disparity between Maori and non-Maori patients (HR=1.07, 95% CI 0.77 to 1.47). Conclusion Higher patient comorbidity and poorer access and quality of cancer care are both important explanations for worse survival in Maori compared with non-Maori New Zealanders with colon cancer.

A health researcher's guide to qualitative methodologies

Objective: To provide an overview of qualitative methodologies for health researchers in order to inform better research practices.

The effect of comorbidity on the use of adjuvant chemotherapy and survival from colon cancer: a retrospective cohort study

BackgroundComorbidity has a well documented detrimental effect on cancer survival. However it is difficult to disentangle the direct effects of comorbidity on survival from indirect effects via the influence of comorbidity on treatment choice. This study aimed to assess the impact of comorbidity on colon cancer patient survival, the effect of comorbidity on treatment choices for these patients, and the impact of this on survival among those with comorbidity.MethodsThis retrospective cohort study reviewed 589 New Zealanders diagnosed with colon cancer in 1996–2003, followed until the end of 2005. Clinical and outcome data were obtained from clinical records and the national mortality database. Cox proportional hazards and logistic regression models were used to assess the impact of comorbidity on cancer specific and all-cause survival, the effect of comorbidity on chemotherapy recommendations for stage III patients, and the impact of this on survival among those with comorbidity.ResultsAfter adjusting for age, sex, ethnicity, area deprivation, smoking, stage, grade and site of disease, higher Charlson comorbidity score was associated with poorer all-cause survival (HR = 2.63 95%CI:1.82–3.81 for Charlson score ≥ 3 compared with 0). Comorbidity count and several individual conditions were significantly related to poorer all-cause survival. A similar, but less marked effect was seen for cancer specific survival. Among patients with stage III colon cancer, those with a Charlson score ≥ 3 compared with 0 were less likely to be offered chemotherapy (19% compared with 84%) despite such therapy being associated with around a 60% reduction in excess mortality for both all-cause and cancer specific survival in these patients.ConclusionComorbidity impacts on colon cancer survival thorough both physiological burden of disease and its impact on treatment choices. Some patients with comorbidity may forego chemotherapy unnecessarily, increasing avoidable cancer mortality.

Ethnicity and management of colon cancer in New Zealand: do indigenous patients get a worse deal?

Racial and ethnic inequalities in colon cancer treatment have been reported in the United States but not elsewhere. The authors of this report compared cancer treatment in a nationally representative cohort of Maori (indigenous) and non‐Maori New Zealanders with colon cancer.

When does neighbourhood matter? Multilevel relationships between neighbourhood social fragmentation and mental health

Studies investigating relationships between mental health and residential areas suggest that certain characteristics of neighbourhood environments matter. After developing a conceptual model of neighbourhood social fragmentation and health we examine this relationship (using the New Zealand Index of Neighbourhood Social Fragmentation (NeighFrag)) with self-reported mental health (using SF-36). We used the nationally representative 2002/3 New Zealand Health Survey dataset of urban adults, employing multilevel methods. Results suggest that increasing neighbourhood-level social fragmentation is associated with poorer mental health, when simultaneously accounting for individual-level confounding factors and neighbourhood-level deprivation. The association was modified by sex (stronger association seen for women) and labour force status (unemployed women more sensitive to NeighFrag than those employed or not in labour force). There was limited evidence of any association of fragmentation with non-mental health outcomes, suggesting specificity for mental health. Social fragmentation as a property of neighbourhoods appears to have a specific association with mental health among women, and particularly unemployed women, in our study.

Primary health care in New Zealand: the impact of organisational factors on teamwork

BACKGROUND Although teamwork is known to optimise good health care, organisational arrangements and funding models can foster, discourage, or preclude functional teamworking. Despite a new, enhanced population-based funding system for primary care in New Zealand, bringing new opportunities for more collaborative practice, fully implemented healthcare teamwork remains elusive. AIM To explore perceptions of interprofessional relationships, teamwork, and collaborative patient care in New Zealand primary care practice. DESIGN OF STUDY Qualitative. SETTING Eighteen nurses and doctors working in primary care, Wellington, New Zealand. METHOD Data were collected using in-depth interviews with individual nurses and doctors working in primary care settings. Perceptions of, and attitudes about, interprofessional relationships, teamwork, and collaborative patient care were explored, using an interactive process of content analysis and principles of naturalistic enquiry. RESULTS Nurses and doctors working in New Zealand primary care perceive funding models that include fee-for-service, task-based components as strongly discouraging collaborative patient care. In contrast, teamwork was seen to be promoted when health services, not individual practitioners, were bulk-funded for capitated healthcare provision. In well-organised practices, where priority was placed on uninterrupted time for meetings, open communication, and interprofessional respect, good teamwork was more often observed. Salaried practices, where doctors and nurses alike were employees, were considered by some interviewees to be particularly supportive of good teamwork. Few interviewees had received, or knew of, any training to work in teams. CONCLUSION Health system, funding, and organisational factors still act as significant barriers to the successful implementation of, and training for, effective teamwork in New Zealand primary care settings, despite new opportunities for more collaborative ways of working.

Deviant insiders: medical acupuncturists in New Zealand

Acupuncture gained considerable attention in anglophone countries in the 1970s. As part of that popularity many medical practitioners became interested in the therapy and learned acupuncture techniques. A number of studies have indicated that medical practitioners were able to take up the practice of acupuncture without threatening the cultural authority of medicine so long as they limited the scope of its practice and redefined acupuncture concepts in Western biomedical terms. These analyses tend to present the medical profession as monolithic and emphasize a dichotomous relationship between biomedicine and alternative therapies such as acupuncture. This study examines the ways in which acupuncture has been represented in different medical forums, suggesting that in order to understand the relationships between biomedicine and alternative medicine we need to be more aware of the changing nature of these representations and their dependency upon the context of the representation. Rather than emphasizing a duality between orthodox medicine and alternative medicine, it is argued here that there are pluralities of medical and healing worldviews.

Home as a hybrid centre of medication practice

This article presents research that explores how medications are understood and used by people in everyday life. An intensive process of data collection from 55 households was used in this research, which included photo-elicitation and diary-elicitation interviews. It is argued that households are at the very centre of complex networks of therapeutic advice and practice and can usefully be seen as hybrid centres of medication practice, where a plethora of available medications is assimilated and different forms of knowledge and expertise are made sense of. Dominant therapeutic frameworks are tactically manipulated in households in order for medication practices to align with the understandings, resources and practicalities of households. Understanding the home as a centre of medication practice decentralises the role of health advisors (whether mainstream or alternative) in wellness practices.

Challenges to alcohol and other drug discussions in the general practice consultation

Background. There is a widely held expectation that GPs will routinely use opportunities to provide opportunistic screening and brief intervention for alcohol and other drug (AOD) abuse, a major cause of preventable death and morbidity. Aim. To explore how opportunities arise for AOD discussion in GP consultations and how that advice is delivered. Design. Analysis of video-recorded primary care consultations Setting. New Zealand General Practice. Methods. Interactional content analysis of AOD consultations between 15 GP’s and 56 patients identified by keyword search from a bank of digital video consultation recordings. Results. AOD-related words were found in almost one-third (56/171) of the GP consultation transcripts (22 female and 34 male patients). The AOD dialogue varied from brief mention to pertinent advice. Tobacco and alcohol discussion featured more often than misuse of anxiolytics, night sedation, analgesics and caffeine, with only one direct enquiry about other (unspecified) recreational drug use. Discussion was associated with interactional delicacy on the part of both doctor and patient, manifested by verbal and non-verbal discomfort, use of closed statements, understatement, wry humour and sudden topic change. Conclusions. Mindful prioritization of competing demands, time pressures, topic delicacy and the acuteness of the presenting complaint can impede use of AOD discussion opportunities. Guidelines and tools for routine screening and brief intervention in primary care do not accommodate this reality. Possible responses to enhance AOD conversations within general practice settings are discussed.

National identity and controversy: New Zealand's clean green image and pentachlorophenol

In the 1990s regulatory bodies in New Zealand worked to develop guide-lines to clean up the contamination of land caused by the use of pentachlorophenol in the treatment of timber. In contrast, there has been little effort to identify and compensate workers contaminated at these sites. This paper explores some of the reasons why action over the contaminated land was relatively quickly taken, whilst there was a lingering controversy over the health of the workers who used pentachlorophenol. The case study suggests that symbols of national identity can play an important role in the resolution of controversy.