Instrumental variable methods to assess quality of care the marginal effects of process-of-care on blood pressure change and treatment costs

Economics of Team-Based Care for Blood Pressure Control: Updated Community Guide Systematic Review

INTRODUCTION

This paper examined the recent evidence from economic evaluations of team-based care for controlling high blood pressure.

METHODS

The search covered studies published from January 2011 through January 2021 and was limited to those based in the U.S. and other high-income countries. This yielded 35 studies: 23 based in the U.S. and 12 based in other high-income countries. Analyses were conducted from May 2021 through February 2023. All monetary values reported are in 2020 U.S. dollars.

RESULTS

The median intervention cost per patient per year was $438 for U.S. studies and $299 for all studies. The median change in healthcare cost per patient per year after the intervention was -$140 for both U.S. studies and for all studies. The median net cost per patient per year was $439 for U.S. studies and $133 for all studies. The median cost per quality-adjusted life year gained was $12,897 for U.S. studies and $15,202 for all studies, which are below a conservative benchmark of $50,000 for cost-effectiveness.

DISCUSSION

Intervention cost and net cost were higher in the U.S. than in other high-income countries. Healthcare cost averted did not exceed intervention cost in most studies. The evidence shows that team-based care for blood pressure control is cost-effective, reaffirming the favorable cost-effectiveness conclusion reached in the 2015 systematic review.

Cost-utility analysis of physician-pharmacist collaborative intervention for treating hypertension compared with usual care

OBJECTIVE

To estimate long-term costs and outcomes attributable to a physician-pharmacist collaborative intervention compared with physician management alone for treating essential hypertension.

METHODS

A Markov model cohort simulation with a 6-month cycle length to predict acute coronary syndrome, stroke, and heart failure throughout lifetime was performed. A cohort of 399 patients was obtained from two prospective, cluster randomized controlled clinical trials implementing physician-pharmacist collaborative interventions in community-based medical offices in the Midwest, USA. Framingham risk equations and other algorithms were used to predict the vascular diseases. SBP reduction due to the interventions deteriorated until 5 years. Direct medical costs using a payer perspective were adjusted to 2015 dollar value, and the main outcome was quality-adjusted life years (QALYs); both were discounted at 3%. The intervention costs were estimated from the trials, whereas the remaining parameters were from published studies. A series of sensitivity analyses including changing patient risks of vascular diseases, probabilistic sensitivity analysis, and a cost-effectiveness acceptability curve were performed.

RESULTS

The lifetime incremental costs were $26 807.83 per QALY (QALYs gained = 0.14). The intervention provided the greatest benefit for the high-risk patients, moderate benefit for the trial patients, and the lowest benefit for the low-risk patients. If a payer is willing to pay $50 000 per QALY gained, in 48.6% of the time the intervention would be cost-effective.

CONCLUSION

Team-based care such as a physician-pharmacist collaboration appears to be a cost-effective strategy for treating hypertension. The intervention is most cost-effective for high-risk patients.