Tuesday, November 2, 2021

On behavioral change, health and age

A Health Affairs article (Meyer 2021) discusses the potential benefits of Medicare Diabetes Prevention Programs (MDPP). MDPP aims to reduce patient weight and prevent patients from becoming diabetic. Commenting on her Medicare clientele enrolled in the program, one instructor noted:

“I’ve seen a lot of Medicare people do really well with the program because they have more time than younger people who are working or raising children,” she said. “But Medicare folks may have a harder time making [lifestyle] changes because they’ve been doing things the same way for a long time.”

MDPP was the first Center for Medicare and Medicaid Innovation (a.k.a., CMMI; a.k.a., the CMS Innovation Center) demonstration of a preventive care model that was expanded to program available to al Medicare beneficiaries. However, uptake of the program is poor; only 3,600 Medicare beneficiaries across the nation have taken advantage of the MDPP benefit.

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How much money should governments spend to incentivize the development of new antibiotics?

As the number of infections that are anti-biotic resistant grows, we need to have more novel antibiotics in our arsenal. The problem is that many antibiotics are not commercially viable. For instance, if a new antibiotic is marginally better than the existing one, few payers will be willing to cover this cost. However, if new bacteria become resistant to the standard of care antibiotic, then the novel antibiotic would be highly valued. In short, antibiotics have a very high option value.

There have been a number of approaches to try to incentivize new R&D on antibiotics, including various prizes and subscription models.

The most prominent examples of antibacterial subscriptions are the pilot program created in 2019 by the National Health Service England (the UK pilot)14,15 and the Pioneering Antibiotic Subscriptions to End Upsurging Resistance (PASTEUR) Act, which was reintroduced in 2021 in the US Congress.16 In a subscription, the company is paid an annual subscription amount and agrees to provide as much of the antibacterial as is needed by the subscriber at no additional cost. As with earlier proposals to offer prizes for successful antibacterial R&D,17–20 one key question is the appropriate size of the pull incentive

A key question is how large these incentives should be. Some previous literature have proposed the following amounts:

  • Department of Health and Human Services. Push and pull incentives should be $919m (2012 USD) for a single indication. (Sertkaya et al. 2014)
  • Review on Antimicrobial Resistance (AMR Review): Market entry rewards should be $800m to $1.3 billion USD, plus an additional $400m per year in research grants. (O’Neill 2016)
  • German Federal Ministry of Health’s Global Union for Antibiotics Research and Development report. $1 billion global launch reward–similar to a market entry award–plus $400 million in push incentives per year. Half of the $400m would go to preclinical research and the other half to clinical research. (Bundesministerium für Gesundheit 2011)
  • DRIVE-AB. The acronym stands for “Driving reinvestment in research and development for antibiotics and advocating their responsible use”; DRIVE-AB was a consortium of academics and industry experts. It was funded by the European Commission’s Innovative Medicines Initiative. DRIVE-AB recommended a $1 billion global market entry reward (pull), plus $800m in research funding (push) and ideally peak year sales of >$1 billion would lead to 18 new antibacterial medications over 3 decades. (Årdal et al. 2018; Okhravi et al. 2018)
  • World Health Organization (WHO) report. This report largely averages the estimates from previous reports. (Breyer et al. 2020; WHO 2020)

A paper by Outterson (2021) in Health Affairs published today aimed to update these estimates. He creates a net present value (NPV) calculation which depends on development cost (i.e., cost, duration and probability of success for any phase in the drug development process); revenues and expenses after antimicrobial approval; and the discount rate. The authors models different approaches to reach the NPV: based on global peak year sales (GPYS); based on a market entry reward paid in one year (MER1); based on subscription paid over ten years (SUB10); of based on the acquisition of a Phase II-ready asset (AQ). Using these approaches, Outterson finds that:

The partially delinked market entry reward required for an asset acquired at the initiation of Phase II was $1.6 billion (best estimate), with the upper and lower-bound estimates being $2.6 billion and $900 million, respectively (MER1 + ACQ). For a fully delinked subscription, the results are $3.1 billion (best estimate), with the upper and lower bounds being $4.8 billion and $2.2 billion, respectively.

The level of global peak year sales (GPYS) required for profitable antibiotic R&D is $1.9 billion (range: $1.6–$3.8 billion), which is a significantly higher sales amount than that achieved by any recent antibacterial. Only two antibacterials launched since 2000 have achieved $1 billion in peak sales: linezolid (Zyvox), with $1.353 billion in 2015 (launched in April 2000), and daptomycin (Cubicin), with $1.312 billion in 2016 (launched in November 2003)…

The partially delinked global market entry reward required (MER1) is $2.2 billion (best estimate), with lower- and upper-bound estimates of $1.5 billion and $4.8 billion, respectively…

The fully delinked global subscription required over the course of ten years (SUB10) is $4.2 billion (best estimate), with lower- and upper-bound estimates of $3.3 billion and $8.9 billion, respectively

The authors find that subscriptions are more expensive because (i) subscriptions are delinked from actual volumes and thus manufacturers must make the drugs without potentially any compensation (beyond the subscription); and (ii) payments are pushed into the future and thus additional funds must be found to compensate for the reduced time-cost of revenues received in the future. They also find that push incentives alone are typically insufficient to bring new antimicrobials to market.

The article is interesting throughout and do read the whole article here.

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Vaccine hesitancy in low- and middle-income countries

While the recently developed COVID-19 vaccines offer the hope of ending the pandemic, ending the pandemic is only feasible if individuals take the vaccine. In the US, a large portion of individuals report being hesitant to receive the vaccine. A key question then is whether individuals living in low and middle-income countries (LMIC) are have high rates of vaccine hesitancy.

A paper by Solís Arce et al. 2021 answers this question by conducting a survey of nearly 45,000 individuals living in 10 LMICs, Russia and the United States. The authors find that: , including a total of 44,260 individuals

The average acceptance rate across the full set of LMIC studies is 80.3% (95% confidence interval (CI) 74.9–85.6%), with a median of 78%…The acceptance rate in every LMIC sample is higher than in the United States (64.6%, CI 61.8–67.3%) and Russia (30.4%, CI 29.1–31.7%). Reported acceptance is lowest in Burkina Faso (66.5%, CI 63.5–69.5%) and Pakistan (survey 2; 66.5%, CI 64.1–68.9%). 

Across individuals who were willing to take the vaccine, the main reason for taking the vaccine was personal protection, with family protection typically coming in second place. Across individuals who were not willing ot take the vaccine, the main reason was concern over side effects, although some countries (Mozambique, Uganda and Pakistan) noted skepticism over vaccine efficacy.

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Thursday, October 28, 2021

Mid-week reading

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Tuesday, October 26, 2021

Characteristics of neighborhoods with high and low COVID-19 vaccination rates

What do the vaccination rates look like in the largest U.S. cities? In these cities, how do the characteristics of individuals in neighborhoods with low vs. high vaccination rates differ?

To answer this question, a paper by Sacarny and Daw (2021) use data from 9 large US cities: New York, Los Angeles, Chicago, Houston, Phoenix, Philadelphia, San Antonio, San Diego, and Dallas. Specifically, they gather data on COVID-19 vaccination and death rates for these cites from health authority websites and sociodemographic information from the American Community Survey (ACS).

They find that neighborhood with high vaccination rates have: (i) more Whites and Asians and fewer Blacks and Hispanics, (ii) more people who received a bachelor’s degree or higher, and (iii) higher income levels, (iv) a higher share of individuals aged 65 and above. Unsurprisingly, COVID-19 deaths are lower in the highly vaccinated neighborhoods in these cities.

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Monday, October 25, 2021

Cato supports public option?

A white paper from Cannon and Pohida (2021) calls for applying “public option principles” to Medicare. Who would have thought that the Cato Institute would call for a public option?

Well in fact, the do not really call for a public option. The proposal should be called introducing a voucher system into Medicare. Under the proposals, Medicare beneficiaries would receive a fixed voucher–adjusted for income and health status–that individuals could used to pay for premiums for whatever insurance they choose, public (Medicare Fee-for-service) or private (Medicare Advantage). The approach is not too dissimilar from one previously proposed by the American Enterprise Institute (AEI) titled “The Best of Both Worlds.” The authors authors explain why they believe this would be a useful system, writing:

Economists have proposed eliminating these perverse incentives by having Medicare directly pay each enrollee a fixed subsidy the enrollee can apply to either traditional Medicare or private insurance. Program administrators would take the money Medicare otherwise would pay to providers and insurers and give those funds directly to enrollees as a monthly payment, just as Social Security does. In 2022, they would divide $783 billion among the program’s 66 million enrollees, such that enrollees would receive an average subsidy of $11,900. Medicare would then adjust individual allotments according to each enrollee’s health status and income (see below), such that all enrollees could afford a standard health insurance plan comparable to traditional Medicare. The net effect is that enrollees would receive approximately the same subsidy they would under current law.

A key issue is how well can people shop across plans. Are quality measures clear? Are the meaningful? Are they free from provider gaming?

The authors cite a paper where Don Berwick–a former CMS administrator–notes that the current provider payment schemes may not incentivize quality.

Even if payment schemes were sensitive to quality, and even if consumers could see the difference between better and worse care, [incentives for quality] improvement would be weakened by the distance between the patients and the payment rules. People and payers who might be quite willing to pay a premium for more fully integrated chronic disease care, for the option of a group visit, or for detailed management of their lipid medications do not have the option to do so because of fixed fee schedules and complex payment rules. This is particularly true under Medicare. In effect, people do not have the option to pay for what they want, even if what they want is better than what they have. 

As I posted recently, Medicare now has a large number of value-based programs, but not many of these alternative payment models have had a large impact on quality.

The authors claim that the voucher-based system will lead to more creative ways to pay providers.

…public-option principles require eliminating favoritism toward fee-for-service payment, or whatever payment rules the government plan happens to employ. Applying that principle to Medicare would increase demand for prepaid group plans and other non-fee-for-service arrangements, promoting dimensions of quality Medicare currently discourages

Also, more standardization of health plans makes it easier to shop across plans; standardizing, however, leads to less innovation as well. The major underlying assumption is that by allowing more competition, cost should fall and outcomes should rise. Skeptics would point out that administrative costs will likely rise as health plans compete and there could be more cost savings with a single payer option. While the later point is valid in a static setting; over the long-run competition tends to be the most effective way to bring down cost.

Another key issue is, how does one adjust for health status and income? While in principle this is easy to do (Medicare Advantage already has their subsidies from CMS risk-adjusted for health status), in practice health systems and insurers may have more information than does the government when making this adjustment. Further, transitory employment shocks–while less of an issue for the Medicare population–can make estimating individual income a challenge.

Despite these numerous challenges, the idea is interesting and the white paper is worth read.

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Saturday, October 23, 2021

Weekend Reading

Here are some questions to get your weekend reading started.

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