A few years ago, Kim Lori Sandler, MD, realized many patients newly diagnosed with lung cancer had never been screened for the disease — they received CT scans only because they were symptomatic.

But Sandler, a radiologist at Vanderbilt University Medical Center in Nashville, Tennessee, could see in medical charts that most of these patients had been eligible for a screening before becoming symptomatic. And for women, most had received decades worth of mammograms. She saw an opportunity and launched a study to find out if an intervention would work.

Low-dose CT and mammography services often are available in the same imaging facility, so women who qualified for a lung cancer screening were offered the scan during their mammography visit. Monthly rates of lung scans in women rose by 50% at one facility and 36% at the other over a 3-year period.

“What we found is that women are really receptive, if you talk to them about it,” Sandler said. “I don’t think that lung cancer is thought of as a disease in women.”

Although lung cancer is the leading cause of cancer deaths in the United States, a recent study in JAMA Internal Medicine found only 18% of eligible patients were screened in 2022, a far cry from the rates of 72% for colon cancer — which itself falls short of goals from US medical groups like the American Cancer Society (ACS). Among those eligible, rates of lung screenings were lowest among younger people without comorbid conditions, who did not have health insurance or a usual source of care, and those living in southern states and states that did not expand Medicaid as part of the Affordable Care Act.

But researchers and clinicians, from those working in an urban health center for the homeless to clinics in the poorest counties in the tobacco belt, have used strategies to raise their rates of screening for lung cancer.

Getting patients screened is lifesaving: 27% of people with lung cancer survive 5 years after diagnosis. But the survival rate rises to 63% when cases are diagnosed at an early stage.

Increasing Uptake

The formal recommendation to use low-dose chest CT to screen for lung cancer is only a decade old. The approach was first endorsed by the United States Preventive Services Taskforce (USPSTF) on the basis of an influential trial that found such testing was linked to a 20% reduction in mortality from the disease. Updated 2021 USPSTF guidelines call for annual screening of people aged 50-80 years who have a 20 pack-year history of smoking and currently smoke or have quit within the past 15 years.

But implementing the recommendation is not always simple. Unlike a colorectal or breast cancer screening, which is recommended primarily on patient age, eligibility for a lung cancer screening requires calculating pack-years of smoking and for past smokers, knowledge of when they quit.

The structured fields in most electronic medical records (EMRs) inquire about current or past use of cigarettes and the number of daily packs smoked. But few EMRs can calculate when a patient starts smoking two cigarettes a day but then increases to a pack a day and cuts down again. EMRs also do not track when a patient has stopped smoking permanently. Individual clinicians or health systems must identify patients who are eligible for screening, but the lack of automated calculations makes that job more difficult.

Sandler and her colleagues turned to the informatics team at Vanderbilt to develop a natural language processing approach that extracts smoking data directly from clinician notes instead of using standard variables in their EMR.

The number of patients identified as needing a screening using the algorithm nearly doubled from baseline, from 5887 to 10,231 over a 3-year period, according to results from another study that Sandler published.

Although the algorithm may occasionally flag someone who does not need screening as eligible, “you can always have a conversation with the patient to determine if they actually meet eligibility criteria,” Sandler said.

Patient Navigators to the Rescue?

About a decade ago, Travis Baggett, MD, MPH, an associate professor of internal medicine at Harvard Medical School, Boston, received pilot funding from the ACS to study cancer epidemiology among patients at Boston Health Care for the Homeless Program (BHCHP), which serves nearly 10,000 patients at a variety of Boston-area clinics each year.

“We found that both the incidence and mortality rates for lung cancer were more than twofold higher than in the general population,” Baggett, who is also the director of research at BHCHP, said.

He also discovered that BHCHP patients were diagnosed at significantly later stages than people in the general population for malignancies like breast and colorectal cancer.

Screening for lung cancer was a new recommendation at the time. With additional funding from the ACS, he launched a clinical trial in 2020 that randomized patients who were eligible for lung cancer screening to either work with a patient navigator or receive usual care.

The navigators eased the burden on primary care clinicians: They facilitated shared decision-making visits, helped participants make and attend appointments for low-dose CT, assisted with transportation, and arranged follow-up as needed.

The 3-year study found 43% of patients who received navigation services underwent screening for lung cancer compared with 9% in the usual care arm. Participants said the navigators played a critical role in educating them about the importance of screening, coordinating care, and providing emotional support.

“At the root of it all, it was quite clear that one thing that made the navigator successful was their interpersonal qualities and having someone that the patient could trust to help guide them through the process,” Baggett said.

The navigator program, however, stopped when the funding for the study ended.

But another health system has implemented navigators in a sustainable way through a quality improvement project. Michael Gieske, MD, director of lung cancer screening at St. Elizabeth Healthcare in Edgewood, Kentucky, starts his Friday morning meeting with a multidisciplinary group, including a thoracic surgeon, radiologist, pulmonologist, and several screening nurse navigators. They review the week’s chest CTs, with approximately one third from patients who underwent lung cancer screening.

Nurse navigators at St. Elizabeth Healthcare follow up with any patient whose scan is suspicious for lung cancer and guide them through the process of seeing specialists and obtaining additional testing.

“They essentially hold the patient’s hand through this scary time in their life and make sure that everything flows smoothly and efficiently,” Gieske, a family medicine physician, said.

St. Elizabeth’s program also draws on several evidence-based strategies used for other cancer screening programs, such as patient and provider education and quarterly feedback to their 194 primary care clinicians on rates of lung cancer screening among their eligible patients.

Several requirements for reimbursement for a lung cancer screening from the US Centers for Medicare and Medicaid Services can also serve as barriers to getting patients screened: Clinicians must identify who is eligible, provide tobacco cessation counseling, and document the shared decision-making process.

To streamline the steps, St. Elizabeth’s clinicians use an EMR smart set that reminds clinicians to verify smoking history and helps them document the required counseling.

Last year, 47% of eligible patients received their recommended screening, and Gieske said he expects even more improvement.

“We’re on track this year to complete 60% uptake if things continue,” he said, adding that 76% of the new cases of lung cancer are now diagnosed in stage I, with only 5% diagnosed in stage IV.

Gieske has shared his experience with many clinics in Appalachia, home to some of the highest rates of mortality from lung cancer in the country. A major part of his role with the Appalachian Community Cancer Alliance is helping educate primary care clinicians in the region about the importance of early detection of lung cancer.

“I think one of the most important things is just to convey a message of hope,” he said. “We’re trying to get the good word out there that if you screen individuals, you’re going to catch it early, when you have an extremely high chance of curing the lung cancer.”

Baggett reported support from grants from the ACS and the Massachusetts General Hospital Research Scholars Program. Bandi, Sandler, and Gieske reported no financial conflicts.

A former pediatrician and disease detective, Ann Thomas, MD, MPH, is a freelance science writer living in Portland, Oregon.

Lung cancer screening with low-dose CT (LDCT) can effectively evaluate a high-risk population for undiagnosed chronic obstructive pulmonary disease (COPD) and airflow obstruction, based on data from a new study of approximately 2000 individuals.

Previous research suggests that approximately 70%-90% of individuals with COPD are undiagnosed, especially low-income and minority populations who may be less likely to undergo screening, said Michaela A. Seigo, DO, of Temple University Hospital, Philadelphia, in a study presented at the American Thoracic Society (ATS) 2024 International Conference.

Although the current guidance from the United States Preventive Services Task Force (USPSTF) recommends against universal COPD screening in asymptomatic adults, the use of LDCT may be an option for evaluating a high-risk population, the researchers noted.

The researchers reviewed data from 2083 adults enrolled in the Temple Healthy Chest Initiative, an urban health system-wide lung cancer screening program, combined with the detection of symptoms and comorbidities.

Baseline LDCT for Identification of Comorbidities

Study participants underwent baseline LDCT between October 2021 and October 2022. The images were reviewed by radiologists for pulmonary comorbidities including emphysema, airway disease, bronchiectasis, and interstitial lung disease. In addition, 604 participants (29%) completed a symptom survey, and 624 (30%) underwent spirometry. The mean age of the participants was 65.8 years and 63.9 years for those with and without a history of COPD, respectively.

Approximately half of the participants in both groups were female.

Overall, 66 of 181 (36.5%) individuals previously undiagnosed with COPD had spirometry consistent with airflow obstruction (forced expiratory volume in 1 second/forced vital capacity, < 70%). Individuals with previously undiagnosed COPD were more likely to be younger, male, current smokers, and identified as Hispanic or other race (not Black, White, Hispanic, or Asian/Native American/Pacific Islander).

Individuals without a reported history of COPD had fewer pulmonary comorbidities on LDCT and lower rates of respiratory symptoms than those with COPD. However, nearly 25% of individuals with no reported history of COPD said that breathing issues affected their “ability to do things,” Seigo said, and a majority of those with no COPD diagnosis exhibited airway disease (76.2% compared with 84% of diagnosed patients with COPD). In addition, 88.1% reported ever experiencing dyspnea and 72.6% reported experiencing cough; both symptoms are compatible with a clinical diagnosis of COPD, the researchers noted.

“We detected pulmonary comorbidities at higher rates than previously published,” Seigo said in an interview. The increase likely reflects the patient population at Temple, which includes a relatively high percentage of city-dwelling, lower-income individuals, as well as more racial-ethnic minorities and persons of color, she said.

However, “these findings will help clinicians target the most at-risk populations for previously undiagnosed COPD,” Seigo said.

Looking ahead, Seigo said she sees a dominant role for artificial intelligence (AI) in COPD screening. “At-risk populations will get LDCT scans, and AI will identify pulmonary and extra-pulmonary comorbidities that may need to be addressed,” she said.

A combination of symptom detection plus strategic and more widely available access to screening offers “a huge opportunity to intervene earlier and potentially save lives,” she told Medscape Medical News.

Lung Cancer Screening May Promote Earlier COPD Intervention

The current study examines the prevalence of undiagnosed COPD, especially among low-income and minority populations, in an asymptomatic high-risk group. “By integrating lung cancer CT screening with the detection of pulmonary comorbidities on LDCT and respiratory symptoms, the current study aimed to identify individuals with undiagnosed COPD,” said Dharani K. Narendra, MD, of Baylor College of Medicine, Houston, in an interview.

“The study highlighted the feasibility and potential benefits of coupling lung cancer screening tests with COPD detection, which is noteworthy, and hits two targets with one arrow — early detection of lung cancer and COPD — in high-risk groups, Narendra said.

“Although the USPSTF recommends against screening for COPD in asymptomatic patients, abnormal pulmonary comorbidities observed on CT chest scans could serve as a gateway for clinicians to screen for COPD,” said Narendra. “This approach allows for early diagnosis, education on smoking cessation, and timely treatment of COPD, potentially preventing lung function deterioration and reducing the risk of exacerbations,” she noted.

The finding that one third of previously undiagnosed and asymptomatic patients with COPD showed significant rates of airflow obstruction on spirometry is consistent with previous research, Narendra told Medscape Medical News.

“Interestingly, in questions about specific symptoms, undiagnosed COPD patients reported higher rates of dyspnea, more cough, and breathing difficulties affecting their daily activities, at 16.1%, 27.4%, and 24.5%, respectively, highlighting a lower perception of symptoms,” she said.

“Barriers to lung cancer screening in urban, high-risk communities include limited healthcare facility access, insufficient awareness of screening programs, financial constraints, and cultural or language barriers,” said Narendra.

Potential strategies to overcome these barriers include improving access through additional screening centers and providing transportation, implementing community-based education and outreach programs to increase awareness about the benefits of lung cancer screening and early COPD detection, and providing financial assistance in the form of free screening options and collaboration with insurers to cover screening expenses, she said.

“Healthcare providers must recognize the dual benefits of lung cancer screening programs, including the opportunity to screen for undiagnosed COPD,” Narendra emphasized. “This integrated approach is crucial in identifying high-risk individuals who could benefit from early intervention and effective management of COPD. Clinicians should actively support implementing comprehensive screening programs incorporating assessments for pulmonary comorbidities through LDCT and screening questionnaires for COPD symptoms,” she said.

“Further research is needed to evaluate long-term mortality outcomes and identify best practices to determine the most effective methods and cost-effectiveness for implementing and sustaining combined screening programs in various urban settings,” Narendra told Medscape Medical News.

Other areas to address in future studies include investigating specific barriers to screening among different high-risk groups and tailoring interventions to improve screening uptake and adherence, Narendra said. “By addressing these research gaps, healthcare providers can optimize screening programs and enhance the overall health of urban, high-risk populations,” she added.

The study received no outside funding. The researchers had no financial conflicts to disclose.