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. Author manuscript; available in PMC: 2018 Dec 10.
Published in final edited form as: Stata J. 2017 Mar;17(1):181–207.
(Std. Err. adjusted for 1,977 clusters in patid)
                  _t SHR Robust
Std. Err. 		 z P>|z| [95% Conf. Interval]
              score
Medium risk 1.271221 .1554323 1.96 0.050 1.000333 1.615465
    High risk 1.769853 .3238535 3.12 0.002 1.236465 2.533337