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. 2018 Nov 9;155(5):900–907. doi: 10.1016/j.chest.2018.10.039

Figure 1.

Figure 1

Locations of lung cancer screening facilities (N = 3,706) participating in the LCSR and facility density per 100,000 at-risk persons who were current smokers age ≥ 45 y. The 50 states and the District of Columbia were grouped into three clusters, shown as three different colors for the state boundaries: cluster 1 in black (Alaska, Colorado, Connecticut, Delaware, Florida, Hawaii, Iowa, Idaho, Illinois, Indiana, Kansas, Massachusetts, Maryland, Maine, Michigan, Minnesota, Montana, North Dakota, Nebraska, New Hampshire, New Jersey, New York, Ohio, Oregon, Pennsylvania, Rhode Island, South Dakota, Utah, Virginia, Vermont, Washington, Wisconsin, and Wyoming), cluster 2 in red (Alabama, Arkansas, Georgia, Kentucky, Louisiana, Missouri, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, and West Virginia), and cluster 3 in green (Arizona, California, District of Columbia, New Mexico, Nevada, and Texas). LCSR = Lung Cancer Screening Registry.