Surgical management of invasive breast cancer: a 5-year prospective study of treatment in the Australian Capital Territory and South-Eastern New South Wales

Surgical and radiotherapy patterns of care in the management of breast cancer in NSW and ACT Australia

INTRODUCTION

This study aims to report on the surgical and radiotherapy patterns of breast cancer care in New South Wales (NSW) and Australian Capital Territory (ACT) in Australia, to identify factors that impact on utilisation of evidence-based treatment and to report on the overall survival (OS) rate and the influencing factors on OS.

METHODS

Cancer registry data linked to hospital records for all patients with breast cancer diagnosis in NSW and ACT between 2009 and 2014 were used to calculate rates of breast conserving surgery (BCS), mastectomy, sentinel lymph node biopsy (SLNB), axillary lymph node dissection (ALND) and radiotherapy. Multivariate analysis used to identify factors that led to variations in care. 5-year OS was calculated and cox regression model assessed factors that influenced survival.

RESULTS

Data for 30,337 patients were analysed. BCS and mastectomy rates were 64% and 36%, respectively. The SLNB, ALND and ALND after SLNB rates were 61.5%, 32.1% and 6.4%, respectively. Radiotherapy was utilised in 63%. Younger age, socio-economic disadvantage, longer distance to a radiotherapy facility and overseas place of birth were factors that predicted for increased rates of mastectomy and ALND. Radiotherapy was more likely to be utilised in later years of diagnosis, patients between 40-69 years old, and those who lived in major cities and closer to a radiotherapy facility. 5-year OS was 80.5%. Older patients, the socioeconomically disadvantaged and those advanced tumours had worse survival.

CONCLUSION

Variations in breast cancer care continue to exist in certain patient groups that we identified. Targeted strategic planning and further research to identify other drivers of existing disparities remain a priority.

Variations in outcomes by residential location for women with breast cancer: a systematic review

OBJECTIVES

To systematically assess the evidence for variations in outcomes at each step along the breast cancer continuum of care for Australian women by residential location.

DESIGN

Systematic review.

METHODS

Systematic searches of peer-reviewed articles in English published from 1 January 1990 to 24 November 2017 using PubMed, EMBASE, CINAHL and Informit databases. Inclusion criteria were: population was adult female patients with breast cancer; Australian setting; outcome measure was survival, patient or tumour characteristics, screening rates or frequencies, clinical management, patterns of initial care or post-treatment follow-up with analysis by residential location or studies involving non-metropolitan women only. Included studies were critically appraised using a modified Newcastle-Ottawa Scale.

RESULTS

Seventy-four quantitative studies met the inclusion criteria. Around 59% were considered high quality, 34% moderate and 7% low. No eligible studies examining treatment choices or post-treatment follow-up were identified. Non-metropolitan women consistently had poorer survival, with most of this differential being attributed to more advanced disease at diagnosis, treatment-related factors and socioeconomic disadvantage. Compared with metropolitan women, non-metropolitan women were more likely to live in disadvantaged areas and had differing clinical management and patterns of care. However, findings regarding geographical variations in tumour characteristics or diagnostic outcomes were inconsistent.

CONCLUSIONS

A general pattern of poorer survival and variations in clinical management for Australian female patients with breast cancer from non-metropolitan areas was evident. However, the wide variability in data sources, measures, study quality, time periods and geographical classification made direct comparisons across studies challenging. The review highlighted the need to promote standardisation of geographical classifications and increased comparability of data systems. It also identified key gaps in the existing literature including a lack of studies on advanced breast cancer, geographical variations in treatment choices from the perspective of patients and post-treatment follow-up.

Geographic variation in the intended choice of adjuvant treatments for women diagnosed with screen-detected breast cancer in Queensland

Background

Although early diagnosis and improved treatment can reduce breast cancer mortality, there still appears to be a geographic differential in patient outcomes. This study aims to determine and quantify spatial inequalities in intended adjuvant (radio-, chemo- and hormonal) therapy usage among women with screen-detected breast cancer in Queensland, Australia.

Methods

Linked population-based datasets from BreastScreen Queensland and the Queensland Cancer Registry during 1997−2008 for women aged 40−89 years were used. We adopted a Bayesian shared spatial component model to evaluate the relative intended use of each adjuvant therapy across 478 areas as well as common spatial patterns between treatments.

Results

Women living closer to a cancer treatment facility were more likely to intend to use adjuvant therapy. This was particularly marked for radiotherapy when travel time to the closest radiation facility was 4 + h (OR =0.41, 95 % CrI: [0.23, 0.74]) compared to <1 h. The shared spatial effect increased towards the centres with concentrations of radiotherapy facilities, in north-east (Townsville) and south-east (Brisbane) regions of Queensland. Moreover, the presence of residual shared spatial effects indicates that there are other unmeasured geographical barriers influencing women’s treatment choices.

Conclusions

This highlights the need to identify the additional barriers that impact on treatment intentions among women diagnosed with screen-detected breast cancer, particularly for those women living further away from cancer treatment centers.

Electronic supplementary material

The online version of this article (doi:10.1186/s12889-015-2527-2) contains supplementary material, which is available to authorized users.

Exploring mentorship as a strategy to build capacity for knowledge translation research and practice: a scoping systematic review

BACKGROUND

Knowledge translation (KT) supports use of evidence in healthcare decision making but is not widely practiced. Mentoring is a promising means of developing KT capacity. The purpose of this scoping systematic review was to identify essential components of mentoring that could be adapted for KT mentorship.

METHODS

Key social sciences and management databases were searched from January 2002 to December 2011 inclusive. Empirical research in non-healthcare settings that examined mentorship design and impact for improving job-specific knowledge and skill were eligible. Members of the study team independently selected eligible studies, and extracted and summarized data.

RESULTS

Of 2,101 search results, 293 were retrieved and 13 studies were eligible for review. All but one reported improvements in knowledge, skill, or behavior. Mentoring program components included combining preliminary workshop-based training with individual mentoring provided either in person or remotely; training of mentors; and periodic mentoring for at least an hour over a minimum period of six months. Barriers included the need for infrastructure for recruitment, matching, and training; lack of clarity in mentoring goals; and limited satisfaction with mentors and their availability. Findings were analyzed against a conceptual framework of factors that influence mentoring design and impact to identify issues warranting further research.

CONCLUSION

This study identified key mentoring components that could be adapted for KT mentorship. Overall, few studies were identified. Thus further research should explore whether and how mentoring should be tailored to baseline knowledge or skill and individual KT needs; evaluate newly developed or existing KT mentorship programs based on the factors identified here; and examine whether and how KT mentorship develops KT capacity. The conceptual framework could be used to develop or evaluate KT mentoring programs.

Variation in the management of early breast cancer in rural and metropolitan centres: implications for the organisation of rural cancer services

The study examines the management and outcomes of women with early invasive breast cancer treated in rural and metropolitan centres over a nine-year observation period. A prospective audit of the treatment and outcomes of 2081 women with early breast cancer who underwent potentially curative surgery between 1997 and 2006 in metropolitan Canberra or in the surrounding rural region was completed. Overall, there was good agreement between published guidelines and the treatment received by the women in the study. However, women treated in rural centres were less likely to receive postoperative radiotherapy after breast-conserving surgery, or to undergo axillary lymph node surgery or sentinel lymph node biopsy compared with women treated in metropolitan centres. Surgery in a rural centre was associated with increased breast cancer recurrence (HR = 1.54, p < 0.001) and increased breast cancer mortality (HR = 1.84, p < 0.001), after adjustment for age and tumour characteristics. Non-cancer related mortality was increased in women treated in rural centres compared with women travelling to a metropolitan centre for surgery (HR = 2.08; p = 0.005). There were differences in both the care provided and treatment outcomes between women treated in rural centres and women treated in metropolitan centres. However, the increased non-cancer related mortality in women treated in rural centres suggests an increased medical comorbidity in this group. Initiatives supporting rural-based surgeons to adopt new procedures such as sentinel node biopsy may help to optimise rural breast cancer treatment.

Patterns of surgical treatment for women with breast cancer in relation to age

Although treatment recommendations have been advocated for all women with early breast cancer regardless of age, it is generally accepted that different treatments are preferred based on the age of the patient. The aim of this study was to assess the pattern of breast cancer surgery after adjusting for other major prognostic factors in relation to patient age. Data on cancer characteristics and surgical procedures in 31,298 patients with early breast cancer reported to the National Breast Cancer Audit between 1999 and 2006 were used for the study. There was a close association between age and surgical treatment pattern after adjusting for other prognostic factors, including tumor size, histologic grade, number of tumors, lymph node positivity, lymphovascular invasion (LVI), and extensive intraduct component. Breast Conserving Surgery (BCS) was highest among women aged <or=40 years (OR = 1.140; 95% CI: 1.004-1.293) compared to women aged 51-70 years (reference group). BCS was lowest in women aged >70 years (OR = 0.498, 95% CI: 0.455-0.545). Significantly more women aged <or=50 years underwent more than one operation for breast conservation (20.4-24.8%) compared with women aged >50 years (11.4-17.0%). Women aged >70 years were more likely to receive no surgical treatment, 3.5% versus 1.0-1.3% in all other age groups (<or=40, 41-50 51-70 years). There is an association between patient age and the type of breast cancer surgery for women in Australia and New Zealand. Women age <or=40 years are more likely to undergo BCS despite having adverse histologic features and have more than one procedure to achieve breast conservation. Older women (>70 years) more commonly undergo mastectomy and are more likely to receive no surgical treatment.

Exploring mentorship as a strategy to build capacity for knowledge translation research and practice: protocol for a qualitative study

Background

Research funders, educators, investigators and decision makers worldwide have identified the need to improve the quality of health care by building capacity for knowledge translation (KT) research and practice. Peer-based mentorship represents a vehicle to foster KT capacity. The purpose of this exploratory study is to identify mentoring models that could be used to build KT capacity, consult with putative mentee stakeholders to understand their KT mentorship needs and preferences, and generate recommendations for the content and format of KT mentorship strategies or programs, and how they could be tested through future research.

Methods

A conceptual framework was derived based on mentoring goals, processes and outcomes identified in the management and social sciences literature, and our research on barriers and facilitators of academic mentorship. These concepts will inform data collection and analysis. To identify useful models by which to design, implement and evaluate KT mentorship, we will review the social sciences, management, and nursing literature from 1990 to current, browse tables of contents of relevant journals, and scan the references of all eligible studies. Eligibility screening and data extraction will be performed independently by two investigators. Semi-structured interviews will be used to collect information about KT needs, views on mentorship as a knowledge sharing strategy, preferred KT mentoring program elements, and perceived barriers from clinician health services researchers representing different disciplines. Qualitative analysis of transcripts will be performed independently by two investigators, who will meet to compare findings and resolve differences through discussion. Data will be shared and discussed with the research team, and their feedback incorporated into final reports.

Discussion

These findings could be used by universities, research institutes, funding agencies, and professional organizations in Canada and elsewhere to develop, implement, and evaluate mentorship for KT research and practice. This research will establish a theoretical basis upon which we and others can compare the cost-effectiveness of interventions that enhance KT mentorship. If successful, this program of research may increase knowledge about, confidence in, and greater utilization of KT processes, and the quality and quantity of KT research, perhaps ultimately leading to better implementation and adoption of recommended health care services.

Challenges in multidisciplinary cancer care among general surgeons in Canada

Background

While many factors can influence the way that cancer care is delivered, including the way that evidence is packaged and disseminated, little research has evaluated how health care professionals who manage cancer patients seek and use this information to identify whether and how this could be supported. Through interviews we identified that general surgeons experience challenges in coordinating care for complex cancer patients whose management is not easily addressed by guidelines, and conducted a population-based survey of general surgeon information needs and information seeking practices to extend these findings.

Methods

General surgeons with privileges at acute care hospitals in Ontario, Canada were mailed a questionnaire to solicit information needs (task, importance), information seeking (source, frequency of and reasons for use), key challenges and suggested solutions. Non-responders received up to three reminder packages. Significant differences among sub-groups (age, setting) were examined statistically (Kruskal Wallis, Mann Whitney, Chi Square). Standard qualitative methods were used to thematically analyze open-ended responses.

Results

The response rate was 44.2% (170/385) representing all 14 health regions. System resource constraints (60.4%), comorbidities (56.4%) and physiologic factors (51.8%) were top-ranked issues creating information needs. Local surgical colleagues (84.6%), other local colleagues (82.2%) and the Internet (81.1%) were top-ranked sources of information, primarily due to familiarity and speed of access. No resources were considered to be highly applicable to patient care. Challenges were related to limitations in diagnostics and staging, operative resources, and systems to support multidisciplinary care, together accounting for 76.0% of all reported issues. Findings did not differ significantly by surgeon age or setting of care.

Conclusion

General surgeons appear to use a wide range of information resources but they may not address the complex needs of many cancer patients. Decision-making is challenged by informational and logistical issues related to the coordination of multidisciplinary care. This suggests that limitations in system capacity may, in part, contribute to variable guideline compliance. Further research is required to evaluate the appropriateness of information seeking, and both concurrent and consecutive mechanisms by which to achieve multidisciplinary care.

Patterns of Surgical Treatment for Women Diagnosed with Early Breast Cancer in Queensland

BACKGROUND

Australian women with early breast cancer should be given the choice between breast-conserving surgery (BCS) or mastectomy. This is the first Australian study to report on patterns of surgical care specifically for early breast cancer at a population level.

METHODS

Two population-based routine data collections were linked to obtain surgical treatment information for breast cancer cases diagnosed in 2004 in Queensland, from which we identified 1274 cases of early female breast cancer. Logistic regression was used to assess the likelihood of female breast cancer patients having mastectomy, BCS, and axillary node dissection, after adjusting for patient and hospital demographics, tumor size, and comorbidities.

RESULTS

Three-quarters (77%) of women had BCS, 29% had a mastectomy, and 86% had dissection of the axillary lymph nodes. The likelihood of women having mastectomy was higher among women living in rural areas, those treated in public hospitals, and women who had comorbidities of anemia or heart failure. In contrast, BCS was more likely for women treated in private hospitals or hospitals with high surgical caseload. Heart failure decreased the likelihood of BCS. Having an axillary node dissection was more likely among younger women and those treated in high caseload hospitals.

CONCLUSION

The observed differentials in surgical treatment for early breast cancer patients suggest that access issues may have contributed to the decision-making process. Understanding the reasons why women with early breast cancer choose a certain treatment strategy should be a focus of future research.

SURGICAL MANAGEMENT OF BREAST CANCER IN A SMALL PERIPHERAL NEW ZEALAND HOSPITAL

BACKGROUND

Peripheral hospitals are perceived to be at a disadvantage in providing treatment for breast cancer, especially with regard to breast conservative surgery (BCS) because of the requirement of adjuvant radiotherapy. Wairau Hospital is a 100-bed peripheral hospital in New Zealand with no on-site radiotherapy unit.

METHODS

A retrospective audit of the surgical management of breast cancer between 1998 and 2002 was carried out.

RESULTS

One hundred and fifty-seven presentations during the audit period. Despite the lack of tertiary resources, we report an overall BCS rate of 58.6%, consistent with the appropriate New Zealand guidelines. Of screen-detected cancers, 81.6% underwent BCS. Only five patients requested mastectomy and of those undergoing BCS, five patients refused subsequent adjuvant radiotherapy. This was because of frailty from age and comorbidities and the inconvenience of travel.

CONCLUSION

High rates of BCS are possible in peripheral hospitals. We postulate that intensive support and a visiting outpatient oncological service help empower patients to seek BCS if appropriate. A strong partnership between surgical, radiological and oncological services is also vital.