Socio-demographic variations in lung cancer screening before and after USPSTF recommendation: Results from national health interview surveys (NHIS).
1563 Background: In 2013, USPSTF recommended low-dose CT screening (LCS) for lung cancer in high-risk adults. The change in real-world practice is largely unknown, as well as the association with socio-demographic factors. Methods: Data were extracted from the population-based 2010 and 2015 NHIS. LCS was defined as a chest CT to check for lung cancer within the past year. We included adults aged 55 to 80 years who 1) have 30+ pack-year smoking history; 2) are currently smokers or have quitted within the past 15 years. We excluded adults who 1) have lung cancer; 2) had not seen a physician in the past year. We used weighted analyses to estimate national lung cancer screening rates. Results: A total of 874 and 1041 high-risk smokers responded to the LCS questions for lung cancer in 2010 and 2015, respectively. The screening rate more than doubled from 4.1% to 9.1% (P < 0.01) in all respondents. The increase was greater in women (2.9% to 9.5%, p < 0.01) than men (5.2% to 8.8%, p = 0.03) and in age 65-80 (4.7% to 12.3%, p < 0.01) than age 55-64 (3.8% to 6.3%, p = 0.16). White saw the largest increase and highest rate in 2015 (4.0% to 9.3%, p = < 0.01). Those with some college or above education had the highest rate in 2010, but the lowest in 2015. Household income above 75,000 dollars was associated with the lowest rate in both 2010 and 2015. Conclusions: Since the recommendation of USPSTF, LCS rate for lung cancer has doubled but remains less than 10%. Higher education and household income are associated with lower screening rate, in contrast to studies of other cancers. [Table: see text]