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. Author manuscript; available in PMC: 2016 Mar 15.
Published in final edited form as: Rev Econ Stat. 2015 Dec 8;97(5):951–964. doi: 10.1162/REST_a_00535

Table 6.

Regression Estimates of Survival on DRG inputs and on Both Diffusion Factors from the 2-Factor model of Diffusion

Dependent Variable One-Year Survival One-Year Survival
Factor A 0.014
(0.001)
Factor A:
Quintile 2		 0.008
(0.002)
Factor A:
Quintile 3		 0.013
(0.002)
Factor A:
Quintile 4		 0.023
(0.002)
Factor A:
Quintile 5		 0.026
(0.002)
Factor B 0.005
(0.001)
Factor B:
Quintile 2		 0.005
(0.002)
Factor B:
Quintile 3		 0.007
(0.002)
Factor B:
Quintile 4		 0.012
(0.003)
Factor B:
Quintile 5		 0.009
(0.003)
Log (DRG) 0.020
(0.004)		 0.021
(0.004)
R2 0.09 0.09

Notes: Each column reports estimates from a separate regression in which an observation is a hospital-year, with N = 49,937 hospital-years. All regressions are weighted by the number of patients in each hospital-year. The dependent variable is the risk-adjusted one-year survival rate among AMI patients. The diffusion factors and quintiles are based on the 2-factor model described in Table 5. Log(DRG) is the log of the risk-adjusted total DRG weights per patient in the year following their AMI. Year dummy variables are included in all regressions. Risk-adjusted survival and DRG weights are derived from Medicare claims data from 1986–2004. The sample is limited to hospital/year observations with at least 5 observations per hospital. Standard errors (clustered at the hospital level) are in parentheses.