Is There Extra Cost of Institutional Care for MS Patients?
Table 4
Effect of MS volume on SNF inpatient costs (Model 1).
Parameters
Estimate
RSE
value
Intercept
2.747
0.119
<.0001
Facility percent of MS days
−0.001
0.001
0.26
Facility mean %MS days
0.002
0.003
0.435
Log of wage
0.143
0.026
<.0001
Log of total case-mix-adjusted inpatient days
0.643
0.019
<.0001
Log of N of admissions adjusted for case mix
0.030
0.003
<.0001
Facility mean of log of wages
0.997
0.045
<.0001
Facility mean of log of total inpatient days
0.288
0.024
<.0001
Facility mean of log of total of admissions
−0.007
0.008
0.367
Competition
−0.010
0.019
0.609
Not for profit
0.033
0.021
0.105
Governmental
0.119
0.038
0.002
Interaction of competition and NFP
0.044
0.032
0.168
Interaction of competition and governmental
0.029
0.057
0.613
RSE: robust standard error; MS: multiple sclerosis. Log of total case-mix-adjusted inpatient days. Facility wage is the county/year mean of average SNF wages. Wages were adjusted for inflation. NFP: not for profit. Using facilities’ REs and AR (1) structure of residuals errors. See the appendix for performance of the mixed model.
