Nearly Half of Patients Treated for Early-Stage Breast Cancer Report at Least One Severe Side Effect
Nearly half of women treated for early-stage breast cancer reported at least one side effect from their treatment that was severe or very severe, according to a new study published by Friese et al in Cancer.
Although it might be expected for women undergoing chemotherapy, researchers found one-third of women who didn’t receive chemotherapy experienced severe side effects of treatment. Side effects led to additional doctor’s appointments, trips to the emergency room, delays in treatment, and reduced dosages.
“It's in patients’ best interest to receive their treatments on time and on schedule, whenever possible, to give them the best possible outcome. Unscheduled care for toxicities—including clinic visits, emergency department visits, and hospital stays—are expensive, inconvenient, and disruptive to both doctors and patients. We need to avoid them whenever possible,” said study author Steven J. Katz, MD, MPH, Professor of Medicine and of Health Management and Policy at the University of Michigan.
Side Effects Reported
Researchers surveyed a diverse group of 1,945 women diagnosed with early-stage breast cancer. Women were surveyed an average of 7 months after diagnosis. They were asked to rate the severity of seven common side effects of breast cancer treatment: nausea/vomiting, diarrhea, constipation, pain, arm swelling, shortness of breath, and breast skin irritation.
The survey also asked patients what kind of help they sought for their side effects—from discussing it at a routine visit to scheduling additional appointments or seeking emergency care.
Overall, 93% of women said they experienced at least one of the seven side effects, with 45% rating it severe or very severe. Pain, skin irritation, and constipation were most frequently severe or very severe.
Most patients sought help for side effects during routine doctor’s appointments, but 9% scheduled an additional appointment, and 5% went to an emergency department or hospital.
Women who had both chemotherapy and radiation treatment were 30% more likely to report a severe side effect compared to women who had only one of those treatments. Women who had double mastectomy were twice as likely as those who had lumpectomy to report severe or very severe pain.
Severe side effects were also more common to Latina women, who were 30% more likely than white women to report a severe or very severe side effect. This may help explain prior findings that Latinas with breast cancer have lingering quality-of-life issues after treatment, researchers say.
For the most part, side effects of cancer treatment are reported via clinical trials or cancer registries. Few studies have solicited input directly from a diverse group of patients.
“As an oncologist, I knew from my clinical practice that more women were suffering than is generally reported in clinical trials,” explained Allison Kurian, MD, MSc, Associate Professor of Medicine and of Health Research and Policy at Stanford University. “Often, women suffer in silence, afraid to tell their providers about how bad things really are for fear that their treatments may be halted. We need to change that.”
Dr. Kurian said it’s important for oncologists to share information about potential side effects with patients. By making patients aware, they can prepare what to do if nausea, constipation, pain, or other side effects occur. In addition, better data on the severity of side effects should be collected and then shared with patients to help with their treatment decision-making.
The researchers are developing tools to help women understand how side effects vary by treatment. Additional studies are examining how side effects vary across diverse chemotherapy practices, as well as the optimal way to manage side effects.
The content in this post has not been reviewed by the American Society of Clinical Oncology, Inc. (ASCO®) and does not necessarily reflect the ideas and opinions of ASCO®.
