How Care Decisions Are Made in Serious Illness: Tests, Goals, and Patient Preferences

Care decisions in serious illness are usually made through shared decision-making between the patient, loved ones, and the medical team. Test results, likely benefits and burdens of treatment, and the person’s goals and preferences all help guide the plan.

Overview

When a person is living with a serious illness, decisions about care often involve more than choosing a single test or treatment. These decisions may include whether to pursue more testing, start or stop certain treatments, focus on symptom relief, or plan ahead for future medical needs. In most cases, the best approach is shared decision-making, where the patient, family or trusted supporters, and healthcare professionals work together.

Doctors use medical information such as the diagnosis, the stage or severity of disease, the patient’s overall health, and likely treatment outcomes. Just as important are the person’s own values, daily priorities, beliefs, and understanding of quality of life. For one patient, the top goal may be living as long as possible. For another, it may be staying comfortable, independent, or at home.

Care decisions in serious illness are rarely fixed forever. They often evolve as new test results come in, symptoms change, or treatments begin to help or cause side effects. Revisiting decisions over time is a normal and important part of good care.

How Tests Help Guide Decisions

Tests are often the starting point for important care decisions. Blood tests, imaging scans, biopsies, heart or lung function tests, and other assessments can help doctors confirm a diagnosis and understand how advanced or active a condition is. They may also show whether a treatment is likely to help, whether it is still working, or whether it may be causing harm.

Even so, test results do not make decisions on their own. A scan or laboratory value provides medical information, but it does not tell the team what matters most to the patient. For example, a treatment may slightly extend life but require frequent hospital visits or significant side effects. Whether that trade-off feels acceptable depends on the individual.

Sometimes more testing is useful, and sometimes it is not. The care team may discuss whether a test could change the treatment plan, improve symptom control, or offer meaningful information. If a test is unlikely to change management, a patient may reasonably choose to avoid it, especially if it is invasive, uncomfortable, or burdensome.

• Tests can help clarify diagnosis and severity.
• They may estimate risks, benefits, and likely outcomes of treatment.
• They can monitor response to treatment over time.
• They are most helpful when the results are likely to affect care choices.

Why Goals of Care Matter

Goals of care are the outcomes a patient hopes to achieve through treatment and support. These goals often shape the medical plan as much as test results do. In serious illness, common goals may include prolonging life, relieving pain or breathlessness, preserving independence, avoiding hospitalization, maintaining mental clarity, or being present for meaningful family events.

A doctor may ask questions such as: What abilities are most important to maintain? What level of treatment feels acceptable? What worries the patient most about the future? These discussions help the team recommend options that fit the person rather than focusing only on the disease.

Goals can also change. A patient who first wants every possible treatment may later decide that comfort and time at home matter more. Another person may want active treatment as long as it does not interfere too much with daily life. There is no single correct choice; the key is that care remains aligned with informed patient preferences.

The Role of Patient Preferences and Family Input

Patient preferences are central to serious illness care. Preferences include a person’s values, cultural or spiritual beliefs, tolerance for uncertainty, and willingness to accept side effects or burdens for a possible benefit. Some patients want detailed information and active involvement in every decision, while others prefer the doctor to make recommendations after hearing what matters most to them.

Family members and close friends can play an important supporting role. They may help the patient remember information, ask questions, compare options, and communicate the patient’s wishes if the person becomes too unwell to speak for themselves. In ideal circumstances, family input supports the patient’s voice rather than replacing it.

Disagreement can sometimes happen between relatives, or between loved ones and the patient. When that occurs, clinicians usually return to the patient’s stated wishes, decision-making capacity, and previously expressed values. Social workers, palliative care specialists, chaplains, or ethics consultants may also help families navigate difficult conversations in a respectful way.

How Doctors and Patients Make Choices Together

Shared decision-making usually follows a clear process. First, the care team explains the diagnosis and the likely course of the illness based on available evidence. Next, they outline the options, including the expected benefits, risks, side effects, practical demands, and uncertainties. Finally, they connect those options to the patient’s goals and preferences.

This process often includes discussions about whether treatment is intended to cure disease, control it, slow it down, or mainly relieve symptoms. It may also include whether care should happen in the hospital, clinic, rehabilitation setting, or at home. In some situations, palliative care is introduced to improve comfort and quality of life alongside other treatments, not only at the end of life.

Patients may find it helpful to ask simple, direct questions, such as:

• What is the purpose of this test or treatment?
• What are the likely benefits and how soon might they happen?
• What are the possible downsides or side effects?
• Are there alternatives, including comfort-focused care?
• What happens if the patient chooses to wait or say no?

Good decision-making takes time when possible. Many people benefit from written notes, follow-up visits, or a second opinion, especially when choices are complex or emotionally difficult.

Advance Care Planning and Future Decisions

Advance care planning means thinking ahead about future medical decisions in case the patient becomes unable to make or express choices later. This may include naming a healthcare proxy or decision-maker, discussing wishes about life-sustaining treatments, and recording preferences in an advance directive where legally available.

These conversations are not about giving up. They are about helping future care reflect the patient’s values. For example, a person may wish to receive intensive treatment if recovery seems likely, but not if treatment would only prolong suffering without a meaningful chance of regaining abilities that matter to them.

Advance care planning can also reduce stress for families during a crisis. When loved ones understand what the patient wants, they are less likely to feel uncertain or guilty about urgent medical decisions. Reviewing these plans regularly is important, because preferences may change over time.

Supportive Care, Symptom Relief, and Ongoing Review

Serious illness care is not only about disease-directed treatment. Symptom relief, emotional support, nutrition, rehabilitation, and practical planning are also important. Many patients benefit from palliative care teams that focus on pain, nausea, fatigue, breathlessness, anxiety, sleep difficulties, and communication about complex decisions.

Supportive care can be offered together with treatments such as surgery, medicines, or other interventions. It may help patients feel better, function better, and make clearer decisions. In some cases, symptom control becomes the main priority if treatments are no longer helping enough or are causing too much burden.

Because serious illness often changes over time, regular review matters. The team may revisit whether the current plan is still meeting the patient’s goals, whether test results suggest a new direction, or whether care should shift more toward comfort, home support, or rehabilitation. Near the end of the care journey, some patients and families also ask about coordinated services for symptom-focused support. Acibadem International’s multidisciplinary specialists in JCI-accredited hospitals diagnose and treat complex serious illnesses for international patients and can help guide these discussions as part of individualized care planning.

When to Ask for More Help

Patients and families should ask for more help whenever they feel unsure, overwhelmed, or unclear about the medical plan. It is reasonable to request a longer conversation if the diagnosis is complex, the treatment choices are difficult, or the goals of care are not clearly understood. Questions are an important part of safe and respectful care.

Additional support may also be useful when symptoms are difficult to control, when family members disagree about decisions, or when the patient’s wishes are not well documented. Palliative care teams, nurses, psychologists, social workers, spiritual care professionals, and patient advocates can all contribute to decision support.

Urgent medical attention is important if the patient develops severe pain, sudden shortness of breath, confusion, chest pain, major bleeding, inability to take fluids, or another rapidly worsening symptom. In less urgent situations, a planned discussion with the treating doctor can help review test results, update goals, and ensure the care plan still matches the patient’s preferences.

Frequently asked questions

What does shared decision-making mean in serious illness?

Shared decision-making means the patient and healthcare team make choices together using both medical evidence and the patient’s personal goals. The doctor explains options, benefits, risks, and uncertainties, and the patient shares what matters most in daily life and future care.

Are tests always necessary before making a treatment decision?

Not always. Tests are most useful when they can clarify the diagnosis, guide treatment, or change the care plan. If a test is unlikely to affect decisions or would create too much burden, the patient and doctor may decide not to do it.

Can a patient change their mind about treatment later?

Yes. Preferences and goals can change as symptoms, health status, or personal priorities change. Revisiting decisions over time is a normal part of serious illness care.

What is the difference between treatment goals and patient preferences?

Treatment goals describe what the care plan is trying to achieve, such as symptom relief, longer life, or maintaining independence. Patient preferences describe what the person values and what trade-offs they are willing or not willing to accept to reach those goals.

How can family members help without taking over the decision?

Family members can help by listening, taking notes, asking questions, and helping the patient communicate their wishes clearly. Their role is usually to support the patient’s voice and values, especially if decisions become more complex.

What is advance care planning and who should consider it?

Advance care planning is the process of discussing and documenting future care wishes in case the patient cannot speak for themselves. It can be helpful for anyone with a serious illness, especially when the condition may worsen or decision-making capacity could change.

References

• World Health Organization
• National Institute on Aging
• Centers for Disease Control and Prevention
• National Institute for Health and Care Excellence
• American Academy of Hospice and Palliative Medicine

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.