Exhibit 3.
Sample | Utilization summary | Primary results | |||||||
---|---|---|---|---|---|---|---|---|---|
Comorbidity score | Compariso n group |
Treatme nt group |
All patie nts |
Proporti on in treatmen t group |
Mean direct costs per patient |
Mean LOS per patient (days) |
Estimated mean treatment effecta |
95% CI | Implied mean savingb |
0–1 | 207 | 28 | 235 | 12% | $8,440 | 7.4 | −$1,775 | −5,093, 1,544 | 18% |
2–3 | 276 | 86 | 362 | 24 | 8,528 | 7.0 | −2,321* | −3,869, −773 | 22 |
4 or higher | 230 | 79 | 309 | 26 | 10,030 | 8.2 | −3,515* | −5,949, −1,081 | 32 |
SOURCE Authors’ analysis. NOTES We regressed total direct costs against a binary intervention variable, the independent variables listed in Exhibit 1, and fixed-effects variables to control for hospital site, applying subsample-specific propensity score weights in all cases. Further details are available in the Appendix (see Note 25 in text). Of the 906 matched patients, 98 had an advanced cancer that was not lymphoma, metastatic cancer, or a solid tumor. Of these, 49 (50 percent) had an advanced cancer diagnosis but no comorbidity on the Elixhauser comorbidity scale and thus had an Elixhauser comorbidity score of 0, as explained in the text. The other 49 had an Elixhauser comorbidity score of 1–8 (median: 2), with their cancer diagnosis unaccounted for in the score. Costs are in 2011 dollars. Significance refers to the estimated mean treatment effect.LOS is length-of-stay. CI is confidence interval.
The estimated effect on total direct hospital cost of moving a patient from the comparison arm to the treatment arm, holding all other values constant.
Savings in total direct hospital costs resulting from the consultation. Further details on how these savings were calculated are available in the Appendix (see Note 25 in text).
p < 0.01