Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Multiple characteristics of HAART affect adherence

28.10.2002


Pill count has the greatest impact on adherence, survey reports



The total number of pills that need to be taken every day in HAART therapy has the greatest impact on adherence of 10 characteristics studied, according to a survey of HIV positive individuals, nearly two-thirds of whom had experienced at least three treatment regimens. The findings of the Perspectives on Adherence and Simplicity for HIV+ Patients on Antiretroviral Therapy (PASPORT) survey were presented here today at the 40th Annual Meeting of the Infectious Diseases Society of America (IDSA).

Of the 10 attributes evaluated in the survey, total pills per day had a mean attribute importance score of 14 percent, followed by dosing frequency (13 percent), adverse events (12 percent), diet restrictions (11 percent), pill size (10 percent); number of refills (9 percent) number of insurance co-pays (9 percent), number of prescriptions (8 percent) number of medication bottles (8 percent) and the requirement of bedtime dosing (6 percent).


"In the past, studies have looked primarily at one or two factors related to adherence and measured their impact as single entities," said Valerie Stone, M.D., M.P.H., lead investigator, Associate Chief, General Medicine Unit, Department of Medicine, Massachusetts General Hospital; and Associate Professor of Medicine, Harvard Medical School, Boston. In the PASPORT survey, we used an adaptive conjoint methodology, sometimes called ’trade off’ analysis, which reflects the reality of making HIV treatment decisions as patients consider various trade-offs to tailor a regimen that fits their lifestyles and preferences.

Dr. Stone presented the results of the survey at IDSA today.

Based on survey results, the preferred characteristics of a regimen would include two small pills dosed at the same time each day with no food requirements or restrictions, an "acceptable" adverse event profile, and one prescription refilled monthly with one co-pay.

"The PASPORT Survey supports research documenting that multiple factors impact a patient´s ability to follow a treatment plan exactly as prescribed," said Dr. Stone. Adherence is a complex problem, and over reliance on any single factor may, in fact, impede adherence for some patients, as our survey suggests. Multiple treatment characteristics and the interactions among them should be taken into consideration in tailoring a treatment regimen that may enhance adherence for the individual patient.

Despite a lack of data, it is a common assumption that QD dosing will improve adherence. Although QD dosing was deemed the most desirable dosing schedule by the individuals surveyed, actual QD regimens currently available were perceived as no more likely to improve adherence than a BID regimen consisting of one pill per dose when multiple attributes of HAART regimens were considered simultaneously. This seems to be in large part again, because patients seem to prefer low pill count over QD dosing as the most important attribute,¡¨ said Dr. Stone. Further, the survey found that QD regimens requiring more than two pills per day were less favorably rated than a BID regimen requiring a total of two pills per day.

The main findings related to dosing simplicity derived from the survey were:

  • Total number of pills per day. Patients rated fewer pills higher and the fewest number of pills evaluated two the highest.
  • Dosing frequency. Taking medication less often was rated higher by patients. Taking all drugs once a day at the same time was rated the highest.
  • Adverse events. Although the differences in adverse events (AEs) among the regimens studied was not large, AEs ranked third in importance relative to other treatment characteristics considered in the survey. "This reinforces the importance of discussing potential side effects with patients, and taking steps to prevent them or manage them aggressively should they occur," Dr. Stone said.
  • Dietary restrictions. The requirement that pills be taken on an empty stomach was viewed as a greater barrier to adherence than other dietary restrictions, according to survey responses. Having no food restrictions or requirements was rated the highest.
  • Number of prescriptions/copays. Patients rated fewer number of prescriptions/co-pays higher, with one prescription filled monthly with one co-pay being rated the highest.

In addition to assessing the relative impact on anticipated adherence of dosing characteristics, the survey participants also evaluated seven triple-HAART regimens frequently prescribed for patients with HIV, including three regimens comprising QD medications. The regimens were evaluated individually, and also in head-to-head paired comparisons in which each of the seven regimens was compared with every other regimen, for a total of 21 comparisons. Information about the specific attributes of each regimen, and pictures and symbols were used to indicate features such as food requirements, pill size, number of pills and adverse event profiles.

Neither the brand nor the generic names of the medications were mentioned and identifying markers were obscured. The data collected in the survey are not necessarily representative of all HIV+ individuals. The survey population included 299 HIV+ patients ranging in age from 17 to 72 (median 43), 76 percent of whom were males. African Americans comprised approximately 45 percent of participants, Caucasians 38 percent, Hispanics 15 percent and Asian and other ethnic groups made up the remainder. The survey was conducted in six U.S. cities with a high proportion of citizens infected with HIV (Seattle, San Francisco, Miami, New York City, Atlanta and Washington, D.C.).

All individuals who participated in the survey were treatment-experienced with the majority having been on HAART regimens for four years or more. Of 295 patients who responded to a question on their current level of adherence, 26 percent reported no doses missed in the past three months. Another 32 percent said they had missed 1 or 2 doses; 24 percent said 3 to 5, 8 percent said 6 to 8, and 10 percent said 9 or more.

Elaine Salewske | EurekAlert!
Further information:
http://www.pcipr.com/

More articles from Health and Medicine:

nachricht The genes are not to blame
20.07.2018 | Technische Universität München

nachricht Targeting headaches and tumors with nano-submarines
20.07.2018 | Universitätsmedizin der Johannes Gutenberg-Universität Mainz

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Future electronic components to be printed like newspapers

A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.

The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

A smart safe rechargeable zinc ion battery based on sol-gel transition electrolytes

20.07.2018 | Power and Electrical Engineering

Reversing cause and effect is no trouble for quantum computers

20.07.2018 | Information Technology

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern

20.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>