A prospective study of aromatase inhibitor therapy initiation and self-reported side effects.

PURPOSE: The objective of this study was to examine the associations between aromatase inhibitors (AIs) and side effects less frequently reported in the literature, including difficulty concentrating, forgetfulness, hair loss, and numbness in the extremities. METHODS: Data were analyzed from a cohort of 146 breast cancer patients initiating AI therapy and followed for 1 year and a cohort of 144 postmenopausal women without a history of cancer followed for 6 months. At baseline (prior to AI therapy for breast cancer patients), and at 3 months, 6 months, and 1 year (for breast cancer patients only), a comprehensive questionnaire was administered that ascertained data on symptoms. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated using logistic regression for new onset of symptoms among the breast cancer patients compared to the women without a history of cancer. RESULTS: Among the breast cancer patients, 34.2% were treated with chemotherapy prior to AI treatment. Over the first 6 months of AI treatment, breast cancer patients had significantly higher odds of reporting new onset of forgetfulness (OR 4.00; 95% CI 1.67, 9.59), difficulty concentrating (OR 2.73; 95% CI 1.29; 5.78), hair loss (OR 4.12; 95% CI 1.86, 9.17), and numbness/tingling in the extremities (OR 2.47; 95% CI 1.09, 5.62) compared to women without a history of cancer. Similar increases in odds were observed for the subgroup of women not treated with chemotherapy versus the comparison group. CONCLUSIONS: AI-related symptoms should be monitored and addressed so that adherence to therapy is maintained.

Cardiovascular Health among Black and White Breast Cancer Patients Initiating Aromatase Inhibitor Therapy.

The purpose of this study was to compare the cardiovascular health of Black and White breast cancer patients undergoing adjuvant treatment. Baseline data from a cohort study of Black (n = 45) and White (n = 101) breast cancer patients initiating aromatase inhibitor treatment were analyzed. Participants had a cardiovascular health assessment, including carotid intimal medial thickness measurement, donated a blood sample, and completed a questionnaire. Atherosclerotic cardiovascular disease (ASCVD) event risk scores were calculated. Compared to their White counterparts, the Black patients had a significantly higher median ASCVD risk score (p = 0.009) and had a higher number of CVD risk factors (p < 0.05). Black patients were also more likely to have hypertension, diabetes, or to be obese than the White participants. The prevalence of cardiovascular disease and cardiovascular disease risk factors among Black and White breast cancer patients is high, and racial disparities exist which may have treatment implications.

Racial differences in depressive symptoms and self-rated health among breast cancer survivors on aromatase inhibitor therapy.

The goal of this survey-based study was to examine whether aromatase inhibitor (AI) therapy was associated with depressive symptoms and self-rated health among Black and White breast cancer survivors (N = 761). Results showed that among Black, but not White, breast cancer survivors current AI therapy was associated with a significant increase in the odds of both depressive symptoms (OR 3.59; 95% CI 1.01, 13.00) and poorer self-rated health (OR 3.16; 95% CI 1.06, 9.46). Presence of pain was significantly associated with increased odds of both outcomes among both groups. The findings underscore the importance of addressing not only physical but mental health among breast cancer survivors on AIs, especially those of Black race.

Association between race and physical functioning limitations among breast cancer survivors.

PURPOSE: The goal of this study was to examine differences in physical functioning limitations among African-American and white breast cancer survivors. METHODS: Data were analyzed from 115 African-American and 712 white breast cancer survivors who responded to a hospital registry-based survey. Physical functioning limitations were assessed using a series of eight questions in which individuals were asked about their ability to perform a physical task such as walking a quarter of a mile. A four-category summary score, representing overall severity of limitation, was created using participant responses to the eight questions. Ordinal logistic regression was used to estimate the odds ratio (OR) and 95% confidence interval (CI) for the association between race and physical functioning limitation adjusted for potential confounders. RESULTS: In the unadjusted model, the African-American breast cancer survivors were more than twice as likely to have a greater degree of physical functioning limitation compared to their white counterparts (OR 2.31; 95% CI 1.59, 3.38). After adjustment for covariates, including body mass index (BMI), the race OR was attenuated and no longer statistically significant (OR 1.44; 95% CI 0.92, 2.27). CONCLUSIONS: Findings from this study showed that African-American breast cancer survivors were more likely to have worse physical functioning limitations than their white counterparts; however, much of this disparity was due to racial differences in other variables such as BMI. Future research should focus on effective interventions targeting modifiable risk factors of physical functioning limitations among breast cancer survivors with the goal of improving quality of life.

Aromatase inhibitor therapy and hair loss among breast cancer survivors.

The objective of this study was to examine the associations between aromatase inhibitor therapy and hair loss or hair thinning among female breast cancer survivors. Data were analyzed from 851 female breast cancer survivors who responded to a hospital registry-based survey. Data on hair loss, hair thinning, demographic characteristics, and health habits were based on self-report; data on aromatase inhibitor therapy were collected on the survey and verified using medical record review. Logistic regression was used to estimate the odds ratios (ORs) and 95 % confidence intervals (CIs) for the associations between aromatase inhibitor therapy and the hair outcome variables adjusted for potential confounders, including age and chemotherapy treatment. The results showed that 22.4 % of the breast cancer survivors reported hair loss and 31.8 % reported hair thinning. In the confounder-adjusted analyses, breast cancer survivors who were within 2 years of starting aromatase inhibitor treatment at the time of survey completion were approximately two and a half times more likely to report reporting hair loss (OR 2.55; 95 % CI 1.19-5.45) or hair thinning (OR 2.33; 95 % CI 1.10-4.93) within the past 4 weeks compared to those who were never treated with an aromatase inhibitor. Current aromatase inhibitor use for two or more years at the time of the survey and prior use were significantly associated with hair thinning (current users, ≥2 years: OR 1.86; prior users: OR 1.62), but not hair loss. Findings from this study suggest that aromatase inhibitor use is associated with an increased risk of hair loss and hair thinning independent of chemotherapy and age; these side effects are likely due to the substantial decrease in estrogen concentrations resulting from treatment with this drug. Future research should focus on examining these associations in a prospective manner using more detailed and objective measures of hair loss and thinning.

Effect of Aromatase Inhibitor Therapy on the Cardiovascular Health of Black and White Breast Cancer Patients.

BACKGROUND: The present study examined racial differences in the cardiovascular health effects of aromatase inhibitors. PATIENTS AND METHODS: Data were analyzed from 77 white and 35 black patients with early-stage breast cancer initiating aromatase inhibitor therapy and subsequently followed for 1 year. At baseline and a 1-year follow-up clinic visit, a comprehensive cardiovascular health assessment was conducted, which included measurement of carotid intima-medial thickness and a blood draw to measure high-sensitivity C-reactive protein and cholesterol concentrations. A detailed questionnaire was also completed. The information collected was used to calculate each patient's 10-year risk of atherosclerotic cardiovascular disease events at both measurement points. Paired t tests were used to examine the changes in the continuous outcome variables within groups during the study period. Independent t tests were conducted to examine the changes over time between the 2 groups. RESULTS: No statistically significant changes in carotid intima-medial thickness, atherosclerotic cardiovascular disease risk score, or the other cardiovascular-related outcomes (high-sensitivity C-reactive protein, cholesterol levels, blood pressure) during the first year of aromatase inhibitor therapy were observed among either the black or white breast cancer patients or between the 2 groups. Mean grip strength in the dominant hand decreased significantly and similarly during the 1-year period for the white and black breast cancer patients. CONCLUSION: The findings from the present study suggest no large adverse cardiovascular health effects from aromatase inhibitors during the first year of therapy among either black or white breast cancer patients. However, the results of the present study cannot rule out the potential for long-term adverse changes over the duration of aromatase inhibitor therapy or beyond.