Identifying predictive motor factors for falls in post-menopausal breast cancer survivors

Objective: Breast cancer treatment, including radical surgery, is also pursued as late as the 7th - 8th decade of women's lives. Standard physical rehabilitation procedures offered to those women are predominantly focused on attenuating specific functional deficits of the upper limb and trunk. Seldom do they entail any regimens specifically aimed at recovering overall functionality, and reducing exposure to falls-risk. The study aimed to assess potential interrelationships between the self-reported falls, individual functional capabilities and appreciably reducing exposure to falls-risk in a group of post-menopausal, post-surgical breast cancer survivors.

Methods: The study recruited 102 women (aged 65-79; mean age 70.2), post-surgical breast cancer survivors. The subjects were stratified by age into three groups: Group 1 (65-69 years); Group 2 (70-74 years), and Group 3 (75-79 years). Individual functional capabilities were assessed with Eight-foot up & go test (8UG), chair stand test (CST), and 2-minute step test (2ST). Tinetti POMA test was applied to assess gait and balance disorders. Self-reported falls in the past year were ascertained through a questionnaire. 

Results: Assessment of individual aerobic endurance (2ST) also demonstrated a clear deficit in the mean scores category in all respective age sub-groups, as compared against the reference values. The deficits ranged from 4.86 to 15.90 steps less than the normative values; the oldest subjects demonstrating the largest deficit. The aerobic endurance tests results significantly impacted the ultimate assessment of an individual falls-risk in the oldest group. The analysis of the number of falls sustained within the recent year indicated that 43.67% of the subjects fell victim of such incidents.

Conclusion: An individual exposure to falls-risk was found to be appreciably more dependent upon individual aerobic endurance rather than overall strength of the lower part of the body in the breast cancer survivors over 75.


Comparative effectiveness of chemotherapy versus resection of the primary tumor as the initial treatment in older patients with stage IV colorectal cancer.

 

 Aim: The objective was to determine trends in the use of chemotherapy as the initial treatment and evaluate the comparative effectiveness of initial chemotherapy versus resection of the primary tumour on survival (intention-to-treat analysis) in stage IV colorectal cancer (CRC).

Methods: This cohort study used Surveillance Epidemiology, and End Results (SEER)-Medicare (2000-2011) data, including patients ≥66 years presenting with stage IV CRC. Cox proportional hazards models and instrumental variable analysis were used to determine the association of chemotherapy versus resection of the primary tumour as the initial treatment with 2-year survival. 

Results: The use of chemotherapy as the first treatment increased over time, from 26.8% in 2001 to 46.9% in 2009 (p<0.0001). The traditional Cox model showed that chemotherapy as the initial treatment was associated with the higher risk of mortality (HR, 1.35; 95% CI, 1.27-1.44). When accounting for known and unknown confounders in an instrumental variable analysis, chemotherapy as the initial treatment suggested benefit on 2-year survival (HR, 0.68; 95% CI, 0.44-1.04); however, the association did not reach statistical significance. The study findings were similar in six subgroup analysis. 

Conclusions: The use of chemotherapy as the initial therapy increased substantially in the last decade. Instrumental variable analysis found that chemotherapy as the initial treatment offers similar or better 2-year survival in patients with stage IV CRC. Given the morbidity and mortality associated with colorectal resection in elderly patients, chemotherapy provides an option to patients who are not good candidates for resection. This article is protected by copyright. All rights reserved.

 


 

Comorbidities and Risk of Chemotherapy-Induced Peripheral Neuropathy Among Participants 65 Years or Older in Southwest Oncology Group Clinical Trials.

 

Background. Neuropathy is a debilitating toxicity associated with various chemotherapy agents.We evaluated the association between common comorbid conditions and the development of peripheral neuropathy in patients treated with taxane-based chemotherapy.

Methods. We examined the Southwest Oncology Group database to identify phase II and III trials that included taxane therapy from 1999 to 2011. We linked the Southwest Oncology Group clinical records to Medicare claims data according to Social Security number, sex, and date of birth. The following disease conditions potentially associated with peripheral neuropathy were evaluated: diabetes, hypothyroidism, hypercholesterolemia, hypertension, varicella zoster, peripheral vascular disease, and autoimmune diseases. Multivariate logistic regression was used to model the odds of experiencing grade 2 to 4 neuropathy.

Results. A total of 1,401 patients from 23 studies were included in the analysis. Patients receiving paclitaxel were more likely to experience grade 2 to 4 neuropathy compared with docetaxel (25% v 12%, respectively; OR, 2.20; 95% CI, 1.52 to 3.18; P , .001). The inclusion of a platinum agent was also associated with greater neuropathy (OR, 1.68; 95% CI, 1.18 to 2.40; P = .004). For each increase in age of 1 year, the odds of neuropathy increased 4% (P = .006). Patients with complications from diabetes had more than twice the odds of having neuropathy (OR, 2.13; 95% CI, 1.31 to 3.46; P = .002) compared with patientswith no diabetes. In contrast, patientswith autoimmune diseasewere half as likely to experience neuropathy (OR, 0.49; 95% CI, 0.24 to 1.02; P = .06). The other conditions were not associated with neuropathy.

Conclusion. We found that in addition to drug-related factors, age and history of diabetes were independent predictors of the development of chemotherapy-induced peripheral neuropathy. Interestingly, we also observed that a history of autoimmune disease was associated with reduced odds of neuropathy. Patients with diabetic complications may choose to avoid paclitaxel or taxane plus platinumcombination therapies if other efficacious options exist.

 J Clin Oncol 34:3014-3022. © 2016 by American Society of Clinical Oncology


 

Inclusion of elderly patients in oncology clinical trials

Background. Physicians need clinical trials assessing benefits and harms of treatments to avoid under-treatment or over-treatment of elderly patients. The main objectives of this report were to examine how data regarding elderly oncology patients were presented in medical literature; and to assess the evolution of this presentation between two time periods.

Patients and methods. All phases I, II and III trials dedicated to the treatment of cancer among elderly patients published between 2001 and 2004 and between 2011 and 2014 were reviewed. All phase III clinical trials assessing cancer treatments among adults in the same periods were also reviewed to evaluate potential subgroup analyses in elderly patients in these studies. Key characteristics of interest were extracted by two investigators before descriptive and comparative analyses were undertaken.

Results. A total of 1084 trials were included: 366 and 718 from the first and second time period, respectively. Twenty-seven and 193 of these trials were phase I and II trials dedicated to elderly or frail patients, respectively. A large proportion of phase III trials published between 2011 and 2014 reported at least one analysis dedicated to elderly patients (46.7%) versus 19.3% during the first time period. The use of subgroup analyses of elderly patients in phase III trials was the most frequent source of information. Subgroup analyses were more frequent among trials with industrial funding, trials published in high impact factor journal, intercontinental trials and trials with large sample size. The age threshold defining the elderly subgroup increased over time.

Conclusion. Elderly patients have become a topic of interest during the past decade. However, data available are mostly extracted from subgroup analyses, which can only be regarded as preliminary evidence.

Ann Oncol (2016) 27 (9): 1799-1804.