(Press-News.org) Key Takeaways
Current cancer diagnoses compared with pre-pandemic rates: Researchers quantified missed diagnoses of lung, breast, and colorectal cancers by comparing observed cancer rates in 2020 with pre-pandemic cancer rates (2010-2019).
Potential increase in undiagnosed disease: Incidence rates for all three types of cancer have significantly decreased, suggesting that many patients may currently harbor undiagnosed disease.
Importance of screening: Study adds to the growing body of literature on pandemic-related disruptions and serves as a vital reminder to encourage all patients to stay up to date on their recommended cancer screenings.
CHICAGO: Delays in cancer screening during the COVID-19 pandemic will likely cause a significant increase in cancer cases that could have been caught earlier with screening, and may now be diagnosed at later stages, placing an increased burden on an already strained healthcare system, according to a new research article published in the Journal of the American College of Surgeons (JACS).
“While the medical system as a whole experienced an incredible burden from the COVID-19 pandemic, now we’re going to see a much different burden present itself due to delays in cancer screening,” said senior author Teviah E. Sachs, MD, MPH, FACS, an associate professor of surgery at Boston University Chobanian and Avedisian School of Medicine and chief of the section of surgical oncology at Boston Medical Center. “With this study, we sought to illustrate with data how we could forecast these likely future trends related to screenable cancer incidence.”
For the study, researchers at Boston University developed a predictive statistical model to quantify missed diagnoses of lung, breast, and colorectal cancers by comparing observed cancer rates in 2020 with pre-pandemic cancer rates (2010-2019). According to the authors, the study is one of the first to look at the number of missed colon, lung, and breast cancer diagnoses at the U.S. population level, and adds to the growing body of scientific research revealing how pandemic-related disruptions constrained cancer care.
“These are all cancers that have very profound incidences in our patient population across the U.S. They are much better managed and often curable when found early, and devasting when caught late,” Dr. Sachs said. “In addition, these are all screening tests that were likely put off during COVID-19 because they require patients to come into the hospital setting.”
To quantify potential missed diagnoses, the team’s statistical model incorporated data from the National Cancer Database (NCDB), which collects data on more than 70% of all cancer cases in the United States.* To adjust for cancer cases not included in the NCDB, researchers standardized the data to the U.S. population using Census data.
The team analyzed data from 1,707,395 lung, 2,200,505 breast, and 1,066,138 colorectal cancer patients. Significant differences between the observed cancer rates in 2020 compared with the historical data from 2010-2019 were noted for all three types of cancer:
Colorectal cancer: observed incidence decreased by 18.6%
Lung cancer: observed incidence decreased by 18.1%
Breast cancer: observed incidence decreased by 14.6%
“The incidence for all these cancers decreased, but there’s no reason to believe that cancer incidence dropped during the pandemic in 2020. The data we observe is not likely due to decreasing incidence rates, but I think more likely reflective of missing cancer diagnoses,” said first author Kelsey S. Romatoski, MD, a general surgery resident at Boston Medical Center. “These missed diagnoses are likely going to lead to delays in treatment and upstaging of disease in the coming years.”
In addition, missed diagnoses appeared to disproportionately affect certain sociodemographic populations, including non-White and Hispanic patients and those treated within the Northeast and West regions of the U.S.
Key messages for practitioners
“For these vulnerable patients, it’s especially important that they stay up to date on their screening so we can detect these missed cancers,” Dr. Romatoski said.
“The data in this paper is an important reminder for practitioners to encourage patients who have delayed their recommended cancer screenings to get screened now,” Dr. Sachs added. “And we encourage patients to ask their primary care physician about recommended cancer screenings. It’s imperative that screenings put off due to the pandemic aren’t delayed any longer.”
Study co-authors are Sophie H. Chung, MD; Kelly Kenzik, MS, PhD; Gordana Rasic, MD, MS; Sing Chau Ng, MS; and Jennifer F. Tseng, MD, MPH, FACS.
This article is published as an article in press on the JACS website. This research was also presented at the Grasberger Research Symposium at Boston University Chobanian & Avedisian School of Medicine, Boston, Mass., March 2023.
Dr. Romatoski and Dr. Chung were supported by the Health Resources Services Administration’s National Research Service Award Grant Number T32HP10028.
The authors do not have any relevant disclosures to report.
Citation: Romatoski K, Chung S, Kenzik K, et al. Delays and Disparities in the Observed Versus Predicted Incidence Rates of Screenable Cancers During the COVID-19 Pandemic. Journal of American College of Surgeons. DOI: 10.1097/XCS.0000000000000772.
*The NCDB is a joint project of the Commission on Cancer (CoC) of the American College of Surgeons (ACS)and the American Cancer Society ACS). The database collects more than 1.5 million new cancer cases each year, representing more than 70% of all cancer cases in the United States.
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About the American College of Surgeons
The American College of Surgeons is a scientific and educational organization of surgeons that was founded in 1913 to raise the standards of surgical practice and improve the quality of care for all surgical patients. The College is dedicated to the ethical and competent practice of surgery. Its achievements have significantly influenced the course of scientific surgery in America and have established it as an important advocate for all surgical patients. The College has more than 87,000 members and is the largest organization of surgeons in the world. “FACS” designates a surgeon is a Fellow of the American College of Surgeons.
The Journal of the American College of Surgeons (JACS) is the official scientific journal of ACS. Each month, JACS publishes peer-reviewed original contributions on all aspects of surgery, with the goal of providing its readership the highest quality rapid retrieval of information relevant to surgeons.
Certain cancers will likely rise exponentially due to COVID-19 screening delays
New research quantifies missed diagnoses of lung, breast, and colorectal cancers
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