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. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Biometrics. 2011 Mar 18;67(4):1340–1351. doi: 10.1111/j.1541-0420.2011.01590.x

Table 4.

Results of analyzing DRS data

Covariates Est SE Z p-value
treated vs untreated −.0046 .0020 −2.2847 .022
diabetic type .0057 .0034 1.705 .088
treat*type −.0091 .0034 −2.673 .007
Normal frailty −.000066 .000018 3.741 <.001
Exponential frailty .0545 .0092 5.944 <.001