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. 2017 Sep 11;25(6):739–743. doi: 10.1093/jamia/ocx099

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© The Author 2017. Published by Oxford University Press on behalf of the American Medical Informatics Association. All rights reserved. For permissions, please email: journals.permissions@oup.com

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Figure 1. — The changes in number of RAR events over time. The dots represent the number of RAR events (per 100 000 orders); the dotted line shows the fitted line. The estimates of the change in intercept were: from 4 charts to 2 charts: b₁ = −0.19, P = .33; from 2 charts to 4 charts: b₂ = 0.08, P = .67 (marked in the figure). The changes in trend (slope) were as follows: after 4 charts to 2 charts: b₃ = −0.01, P = .49; after 2 charts to 4 charts: b₄ = −0.01, P = .46. The regression estimates are also provided.