11027 Background: Low density CT (LDCT) screening reduces lung cancer specific and all-cause mortality in high risk populations. However, it remains underutilized. Screening discussions often start in primary care clinics of which nearly 30% are occupied by residents. Recognizing gaps in knowledge in early medical training may translate into a higher utilization of LDCT screening. Methods: To evaluate knowledge about lung cancer screening in Internal Medicine (IM) residents at 4 academic programs we distributed a survey to assess population at risk, mortality benefits, comparison between LDCT, colonoscopy and mammogram, and a knowledge self assessment. Results: 166 out of 360 (46%) IM residents at the 4 institutions participated, including 42% PGY-1, 30% PGY-2, and 28% PGY-3. Residents attained an average of 2.9 correct responses out of 7 (43.1%), without any statistically significant difference among programs. PGY-1 residents performed better than PGY-2 and PGY-3 (p=0.022). 36% correctly identified the appropriate population for screening. 90% correctly indicated that LDCT screening results in a cancer specific mortality reduction. 59% correctly indicated that LDCT results in all-cause mortality reduction. 7.7% answered that women stand to benefit the most from screening. 66% correctly answered that LDCT underperforms colonoscopy regarding mortality reduction. 22% answered correctly that LDCT outperforms mammography in reducing mortality. 65% of residents perceived their knowledge to be average or lower. Conclusions: LDCT knowledge is deficient among the residents studied. PGY-1 residents performed significantly better than their upper level peers. There were no significant differences among institutions. [Table: see text]

Background Chronic obstructive pulmonary disease (COPD) and obstructive sleep apnea (OSA) are common diseases affecting millions worldwide. These two diseases have a complex relationship that is not well understood. Previous small studies suggest an inverse relationship of disease severity of OSA with COPD airflow obstruction. Objective The aim of this study was to determine if a relationship exists between severity of airflow obstruction in COPD and severity of OSA via apnea hypopnea index obtained during an in-lab baseline polysomnogram using a large quaternary care center cohort. Methods From November 2015 through December 2018, 273 patients with confirmed COPD via spirometry and OSA via in-lab baseline polysomnogram were included. Conclusion No associations were noted between severity of airflow obstruction in COPD and disease severity of OSA. Given the heterogeneity of these diseases, further exploration of a relationship within disease subtypes is warranted.

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