Table 3

Change in c-statistics upon exclusion of claims occurring on the index admission date.a

Summary score

Indicators


Outcome

Sample

CMS-HCC

Charlson

Elixhauser

CMS-HCC

Charlson

Elixhauser


In-hospital

All patientsb

-0.133**

-0.017**

-0.027**

-0.196**

-0.021**

-0.06**

(N = 170,342)

(-0.139,-0.127)

(-0.019,-0.014)

(-0.03, -0.024)

(-0.203, -0.189)

(-0.025, -0.017)

(-0.065, -0.054)

DM

-0.082**

0.016

-0.010

NA

NA

NA

(N = 2,339)

(-0.113, -0.035)

(-0.023, 0.029)

(-0.045, 0.008)

Stroke

-0.128**

-0.001

-0.013**

NA

-0.008

-0.042

(N = 9,828)

(-0.147, -0.1)

(-0.006, 0.002)

(-0.02, -0.005)

(-0.017, 0.001)

(-0.055, -0.02)

AMI

-0.081**

-0.001

-0.011**

NA

0.001

-0.038

(N = 5,749)

(-0.095, -0.063)

(-0.005, 0.003)

(-0.017, -0.005)

(-0.009, 0.009)

(-0.053, -0.018)

CHF

-0.054**

-0.004

-0.011**

-0.086**

-0.001

-0.024**

(N = 11,287)

(-0.066, -0.041)

(-0.011, 0.002)

(-0.018, -0.002)

(-0.096, -0.06)

(-0.012, 0.007)

(-0.035, -0.009)

Six-month

All patientsb

-0.058**

-0.024**

-0.023**

-0.074**

-0.028**

-0.038**

(N = 170,342)

(-0.06, -0.056)

(-0.026, -0.022)

(-0.025, -0.022)

(-0.076, -0.071)

(-0.03, -0.026)

(-0.04,-0.036)

DM

-0.030**

-0.022**

-0.017**

-0.029**

NA

-0.025**

(N = 2,339)

(-0.038, -0.018)

(-0.031, -0.008)

(-0.024, -0.008)

(-0.044, -0.012)

(-0.038, -0.007)

Stroke

-0.064**

-0.004**

-0.014**

-0.112**

-0.006**

-0.030**

(N = 9,828)

(-0.07, -0.053)

(-0.006, -0.001)

(-0.017, -0.01)

(-0.119, -0.096)

(-0.01, -0.002)

(-0.035, -0.022)

AMI

-0.050**

-0.006**

-0.015**

-0.072**

-0.008**

-0.031**

(N = 5,749)

(-0.057, -0.041)

(-0.009, -0.002)

(-0.02, -0.01)

(-0.08, -0.056)

(-0.012, -0.003)

(-0.038, -0.022)

CHF

-0.016**

-0.003

-0.007**

-0.023**

-0.004

-0.014**

(N = 11,287)

(-0.02, -0.012)

(-0.005, 0)

(-0.01, -0.003)

(-0.026, -0.016)

(-0.007, 0)

(-0.017, -0.007)


Note: **: The c-statistic of the model "IP+OPpre12mo+index" (included all inpatient and outpatient claims in the 12 months prior to the index hospitalization including the index admission date) is statistically significant different from the model "IP+OPpre12mo " (included all inpatient and outpatient claims in the 12 months prior to the index hospitalization excluding the index admission date) at the 5% level;

NA: Models did not converge due to complete (or quasi-complete) separation.

a Change in c-statistics upon exclusion of claims occurring on the index admission date was estimated by comparing c-statistic of the model "IP+OPpre12mo+index" (included all inpatient and outpatient claims in the 12 months prior to the index hospitalization including the index admission date) and the c-statistic of the model "IP+OPpre12mo " (included all inpatient and outpatient claims in the 12 months prior to the index hospitalization excluding the index admission date); 95% confidence intervals of measures are in parentheses.

b Patients with any hospital admission between January 1st, 2006 and June 30th, 2006.

Li et al. BMC Health Services Research 2010 10:245   doi:10.1186/1472-6963-10-245

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