Poor physical health predicts time to additional breast cancer events and mortality in breast cancer survivors

Clinically defined type 2 diabetes mellitus and prognosis in early-stage breast cancer

PURPOSE

Self-reported diabetes has been associated with poor breast cancer outcomes. Research is needed to investigate the relationship between biologically determined glycemic control and breast cancer prognosis.

METHODS

Archived baseline blood samples from the Women's Healthy Eating and Living Study were used to measure hemoglobin A1C (HbA1C) among 3,003 survivors of early-stage breast cancer (age of diagnosis, 28 to 70 years) observed for a median of 7.3 years for additional breast cancer events and 10.3 years for all-cause mortality. HbA1C levels provide an accurate, precise measure of chronic glycemic levels. Cox regression analysis was performed to assess whether baseline HbA1C levels predicted disease-free and overall survival.

RESULTS

Only 5.8% of women had chronic hyperglycemia (defined as HbA1C levels ≥ 6.5%). Those with HbA1C ≥ 6.5% were older and more likely to be less educated, have nonwhite ethnicity, be obese, and have more advanced breast cancer at diagnosis. HbA1C was significantly associated with overall survival (P(trend) < .001). After adjusting for confounders, risk of all-cause mortality was twice as high in women with HbA1C ≥ 7.0% compared with women with HbA1C less than 6.5% (hazard ratio [HR], 2.35; 95% CI, 1.56 to 3.54). For disease-free survival, there was a nonsignificant 30% increase in risk for HbA1C levels ≥ 7.0% (HR, 1.26; 95% CI, 0.78 to 2.02). During study follow-up, previously diagnosed rather than undiagnosed diabetes seemed to account for the increased risk.

CONCLUSION

Chronic hyperglycemia is statistically significantly associated with reduced overall survival in survivors of early-stage breast cancer. Further study of diabetes and its relationship to breast cancer outcomes is warranted.

Improvement in self-reported physical health predicts longer survival among women with a history of breast cancer

Physical health-related quality of life scores have been, inconsistently, associated with breast cancer prognosis. This analysis examined whether change in physical health scores were related to outcomes in women with a history of breast cancer. 2343 breast cancer survivors in a randomized diet trial provided self-reported assessment of physical health-related quality of life at baseline and year 1. Based on change in physical health score, participants were grouped into subpopulations of decreased physical health, no/minimal changes, and increased physical health. Cox regression analysis assessed whether change in physical health (from baseline to year 1) predicted disease-free and overall survival; hazard ratio (HR) was the measure of association. There were 294 additional breast cancer events and 162 deaths among women followed for 7.3 years. Improvements in physical health were associated with younger age, lower BMI, being employed, not receiving tamoxifen, lower physical activity, and lower baseline physical and mental health. There was no association of change in physical health with additional breast cancer events or mortality among women diagnosed ≤ 2 years before study enrollment. However, among women who entered the study >2 years post-diagnosis, the HR for increased compared to decreased physical health was 0.38 (95% CI, 0.16-0.85) for all-cause mortality. These results appear to support testing an intervention to improve physical health in breast cancer patients among patients after the acute stage of treatment.

El consumo de alcohol en los supervivientes al cáncer: estado de la cuestión y propuestas para el desarrollo de intervenciones psicológicas

Objetivo: El consumo de alcohol se ha establecido como un factor de riesgo para el desarrollo del cáncer de forma consistente a lo largo de los años. En los supervivientes al cáncer el consumo de alcohol después del tratamiento alcanza valores significativos y además el alcohol se ha asociado con aspectos relevantes de la supervivencia, como una mayor depresión y una peor calidad de vida. Sin embargo, no hay una gran variedad de intervenciones cuyo objetivo sea reducir el consumo de alcohol en este grupo de pacientes. Método: Se llevó a cabo una revisión sobre el consumo de alcohol en los pacientes y supervivientes al cáncer y las intervenciones psicológicas disponibles para reducir el consumo, en los últimos 10 años, del año 2007 al 2017. Las bases de datos consultadas fueron PubMed, Web of Science (WOS) y PsycInfo. Se utilizaron los siguientes descriptores: alcohol, cancer patients, survivors, psychological treatment. Resultados: no se observan intervenciones psicológicas diseñadas específicamente para reducir el consumo de alcohol en los supervivientes al cáncer en la literatura previa. La mayoría tienen como objetivo el aumento de las conductas de salud utilizando intervenciones de tipo psicosocial o proporcionando información sobre el alcohol. Solamente una intervención mostró resultados significativos para reducir el consumo de alcohol, en una intervención diseñada para reducir el peso en supervivientes al cáncer de mama. Conclusiones: la relevancia del consumo de alcohol en este grupo de pacientes sugiere la necesidad de que se desarrollen una mayor variedad de intervenciones psicológicas que tengan como objetivo específico la reducción del consumo de alcohol en los pacientes que han superado la enfermedad.