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. 2019 Jan 14;179(5):716–718. doi: 10.1001/jamainternmed.2018.6405

Figure. Percentage of Medicare Enrollees Aged 55 to 77 Years Undergoing Low-Dose Computed Tomography (LDCT) Screening Who Had a Shared Decision-Making (SDM) Visit in the 3 Months Before the LDCT.

Figure.

The denominator for each month is enrollees who underwent LDCT in that month, and the numerator is enrollees who had an SDM visit on the day of the LDCT or in the previous 90 days. Joinpoint analysis revealed a change point (arrowhead) in May 2016 (95% CI, March 2016–July 2016). The slope of the increase for enrollees receiving SDM before May 2016 showed an absolute increase of 1.05% per month. After May 2016, the slope showed an increase of 0.09% per month. Statistical significance for the joinpoint analysis was set at P < .0001.