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Every second patient interrupts therapy — how does this affect your daily practice?

2025-09-11

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In clinical practice, there is an increasing shift away from the concept of compliance, meaning passive obedience to medical recommendations, in favor of adherence, i.e. active participation of the patient in therapy. This is not just a change in terminology, but a fundamental correction of the approach to the treatment of chronic diseases.

In this article you will find specific clinical examples, causes of low adherence and practical ways how you can better support patients in maintaining continuity of therapy in their daily work.

According to the definition of the World Health Organization (WHO), adherence is “the degree to which a patient's behavior—taking medication, following a diet, making lifestyle changes—conforms to the agreed recommendations of a healthcare professional.”

The scale of the problem: the effectiveness of therapy does not end with the prescription

According to the definition of the World Health Organization (WHO), adherence is “the degree to which a patient's behavior—taking medication, following a diet, making lifestyle changes—conforms to the agreed recommendations of a healthcare professional.”

Even the most effective drug therapy will not bring the expected effects if the patient does not use it as directed. WHO data indicate that the average level of adherence in the treatment of chronic diseases in developed countries is about 50%. In practice, this means that every second patient does not implement the therapeutic assumptions on an ongoing basis.

Clinically relevant examples:

  • Hypertension: 15— 46% of patients discontinue treatment within the first 6 months, often without the knowledge of the attending physician.
  • Obesity: Up to 80% of patients drop out of lifestyle modification programs within the first year.
  • Breast cancer: About 20% of women do not complete the full sequence of adjuvant hormone therapy.

The lack of continuity of treatment translates into worsening disease control, increased risk of complications, more frequent hospitalizations and higher treatment costs. In type II diabetes, non-compliance with the recommendations can increase the total cost of therapy up to three times, mainly due to microangiopathic complications.

Why Patients Don't Follow Recommendations: A Multifactorial Model of Adherence

Low adherence is a complex problem, its causes are rarely one-dimensional. The World Health Organization (WHO) distinguishes five key categories of factors:

Patient factors

  • Ignorance about the disease
  • Fear of side effects
  • Depression, stress, lack of motivation
  • Limited sense of influence over one's own health (lack of agency)

Factors associated with therapy

  • Complex dosing regimen (frequent doses, different hours)
  • Polypragmatism (the need to take multiple drugs at the same time)
  • Side effects, lack of rapid clinical effect

Characteristics of the disease

  • Chronic, often asymptomatic course of the disease (e.g. hypertension, hypercholesterolemia)
  • Concomitant conditions complicating the treatment regimen

Health care system

  • Limited time in the office
  • Lack of reminder and monitoring system
  • Difficult access to therapeutic education or psychological support
  • No interdisciplinary teams

Social Determinants

  • Cost of treatment
  • Lack of support in the home environment
  • Low flexibility in work or everyday life

In practice, there is often variation in the different components of adherence within a single patient. For example, the patient resorts to drug therapy, but ignores dietary recommendations or does not engage in physical activity. This requires a more precise approach to monitoring and intervention.

Adherence difficult to measure — yet crucial

In everyday practice, adherence can be difficult to assess. Doctors rely mainly on patient statements, which are not always reliable. Other available methods used in practice are:

  1. Analysis of prescription repurchases (often does not inform about the real intake of medicines),
  2. Monitoring devices (e.g. smart-pill boxes, mobile applications),
  3. Biochemical determinations (e.g. concentration of drug metabolites — mainly used in clinical trials).

The lack of standardized adherence assessment tools makes it difficult to assess the effectiveness of treatment, introduce therapeutic modifications, and plan educational activities.

Clinical Consequences: What Does Low Adherence Mean from a Physician's Perspective?

Failure to comply with therapeutic recommendations by the patient has direct and significant consequences for the diagnosis-therapeutic process. In clinical practice, this means, among other things:

  • Apparent ineffectiveness of treatment leading to unnecessary modification of drug therapy or escalation of doses,
  • The risk of misinterpretation of symptoms, which may arise not from the progression of the disease, but from the discontinuation of therapy,
  • Increased use of health system resources, including unnecessary referrals for specialist diagnostics, hospitalizations and emergency interventions,
  • Emotional and time burden for the doctor, resulting from the lack of expected therapeutic effects despite adherence to clinical guidelines,
  • Disruption of the doctor-patient relationship, when the lack of progress in treatment generates mutual frustration or a decrease in trust.

Therefore, adherence assessment should be considered as an integral part of every follow-up visit, as well as the assessment of symptoms, adverse reactions or test results.

What can a doctor do? Interventions that can be implemented in everyday practice

Many adherence improvement interventions are low cost and can be implemented even with limited consultation time.

  1. Education: explaining the purpose of therapy, the possible effects of drug withdrawal, techniques for dealing with side effects.
  2. Strengthening the therapeutic relationship: active listening, joint decision making.
  3. Personalization of the treatment plan: simplification of dosage, patient preferences.
  4. Reminder systems: contact through micro-interactions in the app, collaboration with family.
  5. Adherence monitoring: short questions at each visit, creation of a simple system of “feedback on an ongoing basis”.

In addition, solutions such as the Doctor.One app allow the doctor to be in contact with the patient also between visits — which is especially important in the treatment of chronic diseases, where face-to-face meetings are too rare to effectively support the continuity of therapy. Asynchronous communication enables a rapid response to the patient's difficulties, and Care Coordinator Support (educator, psychologist, PROM/PREM collector) helps to relieve the burden on the doctor and deepen the therapeutic cooperation. Thanks to this, the patient is not left alone between visits — and the doctor gains a fuller picture of the course of the therapy and more control over its effectiveness.

Adherence as a clinical priority

In the age of personalized medicine and digital models of care, adherence should be considered as a key parameter of treatment effectiveness, not only in scientific research, but above all in outpatient practice. Even short interventions can bring measurable benefits. For example, research on depression therapy shows that a few minutes of motivational sessions with a nurse lead to a significant reduction in the number of treatment interruptions.

Effective adherence support does not require advanced technology or additional time burden. Increasingly, the use of simple, digital tools, for example, short self-assessment forms, which the patient fills out regularly via a mobile application, is increasingly possible. The system can automatically inform the doctor about interruptions in treatment, skipping doses or the appearance of side effects.

As a result, the doctor gains current insight into the implementation of recommendations and possibility prompt intervention before the destabilization of the clinical condition. Importantly, the patient remains an active participant in therapy, which further strengthens his commitment and sense of agency.

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