Endocrine Effects of Breast Cancer Treatment

Adherence to quality breast cancer survivorship care in four Canadian provinces: a CanIMPACT retrospective cohort study

BACKGROUND

In order to maximize later health, there are established components and guidelines for quality follow-up care of breast cancer survivors. However, adherence to quality follow-up in Canada may not be optimal, and may vary by province. We determined and compared the proportion of patients in each province who received adherent and non-adherent surveillance for recurrence, new cancers and late effects, recommended preventive care, and recommended physician visits for comorbidities.

METHODS

Cohorts consisted of all adult women diagnosed with incident invasive breast cancer between 2007 and 2010/2012 in four Canadian provinces (British Columbia (BC) N = 9338; Manitoba N = 2688; Ontario N = 23,700; Nova Scotia (NS) N = 2735), identified from provincial cancer registries, alive and cancer-free at 30 months post-diagnosis. Their healthcare utilization was determined from one to 5 years post-treatment, using linked administrative databases. Adherence, underuse, and overuse of recommended services were evaluated yearly and compared using descriptive statistics.

RESULTS

In all provinces and follow-up years, the majority of survivors had more than the recommended number of visits to either an oncologist or primary care physician (range 53.8% NS Year 3; 85.8% Ontario Year 4). The proportion of patients with the guideline-recommended number of oncologist visits varied by province (range 29.8% BC Year 5; 74.8% Ontario Year 5), and the proportion of patients with less than the recommended number of specified breast cancer-related visits with either an oncologist or primary care physician ranged from 32.6% (Ontario Year 2) to 84.4% (NS Year 3). Underuse of surveillance breast imaging was identified in NS and BC. The proportion of patients receiving imaging for metastatic disease (not recommended in the guidelines) in BC, Manitoba, and Ontario (not reported in NS) ranged from 20.3% (BC Year 5) to 53.3% (Ontario Year 2). Compliance with recommended physician visits for patients with several chronic conditions was high in Ontario and NS. Preventive care was less than optimal in all provinces with available data.

CONCLUSIONS

Quality of breast cancer survivor follow-up care varies among provinces. Results point to exploration of factors affecting differences, province-specific opportunities for care improvement, and the value of administrative datasets for health system assessment.

The association between postdiagnosis dietary supplement use and total mortality differs by diet quality among older female cancer survivors

BACKGROUND

Dietary supplements are widely used by cancer survivors. However, health effects among older cancer survivors are unclear.

METHODS

We used the Iowa Women's Health Study, a prospective cohort study with 2,118 postmenopausal women with a confirmed cancer diagnosis (1986-2002), to evaluate the association between postdiagnosis dietary supplement use assessed in 2004 and subsequent all-cause mortality. Risk of death was evaluated using multivariable-adjusted Cox proportional hazards regression. We performed stratified analyses by diet quality score, dietary micronutrient intake, and perceived general health.

RESULTS

Through 2010, 608 deaths were identified. Approximately 85% of the cancer survivors used dietary supplements. Overall supplement use and multivitamin use were not associated with mortality. Iron supplement use was associated with 39% higher risk of death [95% confidence interval (CI), 1.09-1.77]. This association was stronger among survivors with deteriorating general health. Folic acid supplement use was associated with higher risk of death, only among survivors reporting low-quality diets (HR, 2.33; 95% CI, 1.33-4.08; P interaction = 0.006). Multivitamin use and using a greater number of supplements was associated with a trend towards higher mortality only among those with poor diet quality. Using vitamin E supplements in combination with multivitamin was associated with lower risk of death only among survivors with higher dietary vitamin E intake (HR, 0.61; 95% CI, 0.39-0.94; P interaction = 0.02).

CONCLUSIONS

Postdiagnosis supplement use was associated with higher mortality among older female cancer survivors with poor general health and/or poor dietary intake.

IMPACT

The association between postdiagnosis dietary supplement use and mortality may differ by diet quality and health status among older female cancer survivors.

Adherence to the WCRF/AICR guidelines for cancer prevention is associated with lower mortality among older female cancer survivors

BACKGROUND

The 2007 World Cancer Research Fund/American Institute for Cancer Research (WCRF/AICR) guidelines encourage cancer survivors to follow its cancer prevention recommendations. We evaluated whether adherence to the WCRF/AICR guidelines for cancer prevention was associated with lower mortality among older female cancer survivors.

METHODS

From 2004 to 2009, 2,017 participants in the Iowa Women's Health Study who had a confirmed cancer diagnosis (1986-2002) and completed the 2004 follow-up questionnaire were followed. Adherence scores for the WCRF/AICR guidelines for body weight, physical activity, and diet were computed assigning one, 0.5 or 0 points to each of eight recommendations depending on the degree of adherence. All-cause (n = 461), cancer-specific (n = 184), and cardiovascular disease (CVD)-specific mortality (n = 145) were compared by the total adherence score and by adherence scores for each of the three components of the recommendations.

RESULTS

Women with the highest (6-8) versus lowest (0-4) adherence score had lower all-cause mortality [HR = 0.67; 95% confidence of interval (CI), 0.50-0.94]. Meeting the physical activity recommendation was associated with lower all-cause (Ptrend < 0.0001), cancer-specific (Ptrend = 0.04), and CVD-specific mortality (Ptrend = 0.03). Adherence to dietary recommendations was associated with lower all-cause mortality (Ptrend < 0.05), whereas adherence to the body weight recommendation was associated with higher all-cause mortality (Ptrend = 0.009).

CONCLUSIONS

Adherence to the WCRF/AICR guidelines was associated with lower all-cause mortality among older female cancer survivors. Adherence to the physical activity recommendation had the strongest association with lower all-cause and disease-specific mortality.

IMPACT

Older cancer survivors may decrease their risk of death by leading a healthy lifestyle after a cancer diagnosis.

Urogenital atrophy in breast cancer survivors

PURPOSE/OBJECTIVES

To review the symptoms of urogenital atrophy in breast cancer survivors, influencing factors, and their effects on performance.

DATA SOURCES

Review of qualitative and quantitative research data that describe pain, function, satisfaction, and quality of life related to urologic, genital, and sexual function.

DATA SYNTHESIS

Breast cancer treatment can induce or exacerbate symptoms related to urogenital atrophy. The lower urinary and genital tracts are affected by physiologic alterations, the potential abrupt onset of menopause, and treatment side effects. Symptoms of urogenital atrophy often are more prevalent and severe in women treated for breast cancer than in age-matched women without breast cancer.

CONCLUSIONS

Symptoms related to urogenital atrophy are common in breast cancer survivors and can be affected by physiologic, situational, and psychological influences with negative effects on performance. Research is essential to the understanding of how transient or permanent hormonal alterations affect the urogenital system and the role of these symptoms on quality of life.

IMPLICATIONS FOR NURSING

Nurses must listen with sensitivity to breast cancer survivors and their descriptions of these significant and life-altering symptoms. Personalized discussion enables the nurse to explore issues, assess symptoms, recommend interventions, and evaluate at follow-up visits. Nurses are integral to the provision of survivorship care planning that can address the short- and long-term effects of a cancer diagnosis and related treatments.

Delivery of survivorship care by primary care physicians: the perspective of breast cancer patients

PURPOSE

Most of the 182,460 women diagnosed with breast cancer in the United States this year will become long-term survivors. Helping these women transition from active treatment to survivorship is a challenge that involves both oncologists and primary care physicians (PCPs). This study aims to describe postmenopausal breast cancer survivors' (BCS) perceptions of PCP-related survivorship care.

PATIENTS AND METHODS

We conducted a cross-sectional survey of 300 BCSs seen in an outpatient breast oncology clinic at a large university hospital. The primary outcome measure was a seven-item self-reported measure on perceived survivorship care (Cronbach's alpha = .89). Multivariate regression analyses were used to identify factors associated with perceived care delivery.

RESULTS

Overall, BCSs rated PCP-related survivorship care as 65 out of 100 (standard deviation = 17). The areas of PCP-related care most strongly endorsed were general care (78%), psychosocial support (73%), and health promotion (73%). Fewer BCSs perceived their PCPs as knowledgeable about cancer follow-up (50%), late effects of cancer therapies (59%), or treating symptoms related to cancer or cancer therapies (41%). Only 28% felt that their PCPs and oncologists communicated well. In a multivariate regression analysis, nonwhite race and level of trust in the PCP were significantly associated with higher perceived level of PCP-related survivorship care (P = .001 for both).

CONCLUSION

Although BCSs perceived high quality of general care provided by their PCPs, they were not as confident with their PCPs' ability to deliver cancer-specific survivorship care. Interventions need to be tested to improve oncology-primary care communication and PCP knowledge of cancer-specific survivorship care.

Promoting a healthy lifestyle among cancer survivors

With improving longevity, the late-occurring adverse effects of cancer and its treatment are becoming increasingly apparent. As in other clinical populations, healthy lifestyle behaviors encompassing weight management, a healthy diet, regular exercise, and smoking cessation have the potential to reduce morbidity and mortality significantly in cancer survivors. This article addresses the strength of evidence for recommendations in areas of weight management, diet, exercise, and smoking cessation; and the current evidence examining the efficacy of various intervention approaches to promote health behavior changes among adult cancer survivors.

Endocrine sequelae of cancer and cancer treatments

INTRODUCTION

Exposure to cancer and its treatments, including chemotherapy and radiotherapy, may result in late adverse effects including endocrine dysfunction. Endocrine disorders are the most commonly reported long-term complications of cancer treatment, especially by adult survivors of childhood cancers. This review will explore the endocrinologic adverse effects from non-endocrine cancer therapies.

METHODS

Searches including various Internet-based medical search engines such as PubMed, Medline Plus, and Google Scholar were conducted for published articles.

RESULTS

One hundred sixty-nine journal articles met the inclusion criteria. They included case reports, systematic analyses, and cohort reports. Endocrine disorders including hypothalamus dysfunction, hypopituitarism, syndrome of inappropriate anti-diuretic hormone secretion, diabetes insipidus, growth hormone disorders, hyperprolactinemia, gonadotropin deficiency, serum thyroid hormone-binding protein abnormalities, hypothyroidism, hyperthyroidism, hypomagnesium, hypocalcemia, hyperparathyroidism, hyperparathyroidism, adrenal dysfunction, gonadal dysfunction, hypertriglyceridemia, hypercholesterolemia, diabetes mellitus, and glycosuria were identified and their association with cancer therapies were outlined.

DISCUSSION/CONCLUSIONS

The journal articles have highlighted the association of cancer therapies, including chemotherapy and radiotherapy, with endocrine dysfunction. Some of the dysfunctions were more often experienced than others. Especially in patients treated with radiotherapy, some endocrinologic disorders were progressive in nature.

IMPLICATIONS FOR CANCER SURVIVORS

Recognition and awareness of endocrine sequelae of cancer treatments may permit for early detection and appropriate follow-up care for cancer survivors, thus improving their overall health and quality of life.