Background
Low-dose computed tomography (LDCT) screening reduces lung cancer-specific and overall mortality. We sought to assess lung cancer screening practices and attitudes among primary care providers (PCPs) in the era of new LDCT screening guidelines.
Methods
In 2013, we surveyed PCPs at an academic medical center (60% response) and assessed: lung cancer screening use, perceived screening effectiveness, knowledge of screening guidelines, perceived barriers to LDCT use, and interest in LDCT screening education.
Results
Few PCPs (n=212) reported ordering lung cancer screening: chest x-ray (21%), LDCT (12%), and sputum cytology (3%). Only 47% of providers knew three or more of six guideline components for LDCT screening; 24% did not know any guideline components. In multiple logistic regression analysis, providers who knew three or more guideline components were more likely to order LDCT (OR 7.1, 95% CI 2.0-25.6). Many providers (30%) were unsure of the effectiveness of LDCT. Mammography, colonoscopy, and Pap smear were rated more frequently as effective in reducing cancer mortality compared to LDCT (all p-values < 0.0001). Common perceived barriers included patient cost (86.9% major or minor barrier), harm from false positives (82.7%), patients’ lack of awareness (81.3%), risk of incidental findings (81.3%), and insurance coverage (80.1%).
Conclusions
LDCT lung cancer screening is currently an uncommon practice at an academic medical center. PCPs report ordering chest x-ray, a non-recommended screening test, more often than LDCT. PCPs had a limited understanding of lung cancer screening guidelines and LDCT effectiveness. Provider educational interventions are needed to facilitate shared-decision making with patients.