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Slide Presentation from the AHRQ 2007 Annual Conference

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Table 3. GEE Logit Models of Binary PSIs

(1=poor performance, 0=good performance)

Text Description is below the image.

Variable	PSI-5	PSI-6	PSI-7	PSI-15	Composite score of 4 PSIs
Critical access hospital (CAH)	-0.80	-1.19**	-1.26**	-0.92**	-0.70**
% Medicare days	-0.01	-0.01	-0.01*	-0.01	-0.01
% Medicaid days	-0.01*	0.02	0.03	0.02	0.03
% of surgical discharges	0.09**	0.05**	0.01	0.18**	0.16**
Charlson Index	2.01**	0.69	1.05	1.51**	1.37**
Market concentration (HHI)	-2.11	0.37	0.24	-0.21	-0.15
Per capita income ($1,000)	0	-0.03	0.09	0.06	0.07**
Population density	-0.01	0.02	0.01	0	0
Intercept	-3.23	-2.67*	-3.73**	-3.87**	-3.54**
Observations	712	712	712	712	712

Note: Due to space limit, year dummy variables were omitted in this table.
* Statistically significant at 0.1 level.
** Statistically significant at 0.05 level.
++ Convergence was not achieved.
+++ Ad hospital dummy variables in cross-sectional Tobit model.
‡ The results should be interpreted with caution, given that estimations ofr some coefficients were not stable under quadchk.
¥ Adding two variables (percentage of acute inpatient admission were transferred from other short-term hospital and percentage of acute inpatient patients were transferred to other short-term hospitals) into the models in Table II-6
∏ PSI-5 are observed rate.

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