WHO-5 Well-Being Index: A Comprehensive Guide to This Clinical Screening Tool

The WHO-5 Well-Being Index (WHO-5) is a brief, self-report questionnaire developed by the World Health Organization (WHO) to measure subjective psychological well-being over the preceding two weeks. First introduced in 1998 as a revision of earlier WHO well-being scales, it has become one of the most widely used instruments in clinical practice and research for assessing positive mental health.

Unlike many psychiatric screening tools that focus on identifying symptoms of a specific disorder — such as the PHQ-9 for depression or the GAD-7 for anxiety — the WHO-5 takes a salutogenic approach. This means it measures the presence of well-being rather than the absence of illness. The instrument captures how a person has been feeling in terms of positive mood, vitality, and general interest in daily life. This positive framing is intentional: it reduces stigma, increases patient willingness to engage with screening, and aligns with the WHO's longstanding definition of health as "a state of complete physical, mental and social well-being and not merely the absence of disease."

The WHO-5 consists of just five positively worded statements, making it one of the shortest validated well-being measures available. Despite its brevity, decades of research have demonstrated that it functions effectively as both a measure of well-being and a screening tool for clinical depression across diverse populations and settings.

The WHO-5 assesses subjective psychological well-being across three core dimensions:

• Positive mood — feeling cheerful and in good spirits
• Vitality — feeling active, vigorous, and well-rested
• General interest — being interested in things and finding daily life filled with engaging activities

The five items are:

• I have felt cheerful and in good spirits
• I have felt calm and relaxed
• I have felt active and vigorous
• My daily life has been filled with things that interest me
• I have felt fresh and rested when waking up

Each item is rated on a 6-point Likert scale ranging from 0 ("At no time") to 5 ("All of the time"), reflecting how often the respondent experienced each state over the past two weeks.

It is important to understand that the WHO-5 does not diagnose any psychiatric condition. It measures a person's self-perceived emotional state on a continuum. However, low scores are strongly associated with depressive disorders and other conditions that erode psychological well-being, which is why the instrument has gained widespread use as a first-line depression screening tool in primary care and general medical settings.

One of the greatest strengths of the WHO-5 is its broad applicability. It was designed for use in the general adult population and has been validated across an exceptionally wide range of groups:

• Primary care patients — It is commonly used as a routine screening tool during medical visits, particularly in European healthcare systems.
• People with chronic medical conditions — Research has validated its use in individuals with diabetes, cardiovascular disease, cancer, chronic pain, and other physical illnesses where comorbid depression is common but underdetected.
• Older adults — The WHO-5 has demonstrated good psychometric properties in geriatric populations.
• Adolescents — Modified validation studies support its use in adolescent populations, though clinicians should consider age-appropriate context when interpreting results.
• Cross-cultural populations — The WHO-5 has been translated into more than 30 languages, and cross-cultural validation studies have confirmed its measurement properties across diverse cultural and linguistic groups.

The instrument's positive wording is a particular advantage in populations that may resist completing symptom-focused questionnaires — for example, older adults who may not identify with the language of depression, or patients in medical settings who may view mental health screening as irrelevant to their presenting complaint. The WHO-5's framing around well-being rather than pathology makes it more acceptable and less threatening to many individuals.

The WHO-5 is not designed as a standalone diagnostic tool and should not replace structured clinical interviews or disorder-specific instruments when a formal diagnostic evaluation is needed.

The WHO-5 is notable for its ease of administration, which contributes to its widespread adoption in both research and clinical settings.

Format: It is a paper-and-pencil or digital self-report questionnaire. No special training is required to administer it, and no clinical judgment is involved in scoring — the respondent simply rates each of the five items.

Time: Completion typically takes less than two minutes, making it one of the fastest well-being screening instruments available. This brevity is a significant practical advantage in time-pressured clinical environments like primary care.

Setting: The WHO-5 can be administered in virtually any setting — primary care clinics, specialty medical practices, psychiatric outpatient settings, research studies, workplace wellness programs, or community health screenings. It can be completed in waiting rooms before appointments, integrated into electronic health record (EHR) intake workflows, or used as a repeated measure to track changes in well-being over time.

Frequency: Because the WHO-5 asks about the preceding two-week period, it can be re-administered at intervals of two weeks or longer to monitor change. This makes it suitable for outcome monitoring in treatment settings — tracking whether a patient's well-being improves, declines, or remains stable over the course of therapy, medication management, or other interventions.

Cost and accessibility: The WHO-5 is freely available in the public domain. No licensing fees or permissions are required for clinical or research use. This open-access model has been instrumental in its global dissemination.

Scoring the WHO-5 is straightforward:

Raw score: The scores from all five items (each rated 0–5) are summed, yielding a raw score ranging from 0 to 25. A raw score of 0 represents the worst possible well-being, and 25 represents the best possible well-being.

Percentage score: The raw score is then multiplied by 4 to convert it to a percentage scale from 0 to 100. This percentage score is the standard reporting metric in most clinical and research applications.

Interpretation thresholds:

• Score of 50 or below (raw score ≤ 13): This is the most widely cited cutoff indicating poor well-being. Scores at or below this threshold warrant further assessment for depression and other mental health conditions. Research consistently shows that this cutoff provides good sensitivity for identifying individuals who meet diagnostic criteria for major depressive disorder.
• Score of 28 or below (raw score ≤ 7): Scores in this range suggest very low well-being and have been associated with a high probability of clinical depression. Immediate further evaluation is strongly recommended.
• A change of 10 percentage points or more (equivalent to a change of approximately 2.5 in raw score) is generally considered a clinically meaningful change, making the WHO-5 useful for tracking treatment response.

It is essential to emphasize that no single cutoff score constitutes a diagnosis. A low WHO-5 score indicates compromised well-being and suggests the need for further clinical evaluation — it does not confirm the presence of major depressive disorder, generalized anxiety disorder, or any other specific condition. On the other hand, a high score does not rule out psychiatric conditions, as some individuals with active mental health conditions may still report reasonable subjective well-being on brief measures.

The WHO-5 is one of the most extensively validated brief well-being instruments in the clinical literature. Its psychometric properties have been evaluated in hundreds of studies across diverse populations and languages.

Reliability:

• Internal consistency: Cronbach's alpha values for the WHO-5 consistently fall in the range of 0.83 to 0.95 across studies, indicating excellent internal consistency — meaning the five items reliably measure the same underlying construct.
• Test-retest reliability: Studies report adequate to good test-retest reliability over short intervals, supporting its use as a repeated measure.

Validity as a well-being measure:

• The WHO-5 demonstrates strong convergent validity — it correlates highly with other established well-being and quality-of-life instruments, including the SF-36 Mental Health subscale and other subjective well-being measures.
• Factor analyses consistently confirm that the five items load on a single factor, supporting its interpretation as a unidimensional measure of subjective well-being.

Validity as a depression screener:

• A systematic review by Topp and colleagues (2015) synthesized evidence from multiple studies and concluded that the WHO-5 demonstrates adequate sensitivity (generally reported between 0.83 and 0.93) and specificity (generally reported between 0.64 and 0.83) for detecting depression when using the ≤50 cutoff, with clinical interviews (such as the SCID or CIDI) serving as the reference standard.
• These values compare favorably with other widely used depression screening instruments like the PHQ-9, particularly in primary care and general medical populations.

Responsiveness to change: The WHO-5 has demonstrated good sensitivity to changes in well-being over time, including in response to antidepressant treatment, psychotherapy, and other interventions. This makes it a valuable outcome measure in clinical trials and routine clinical monitoring.

Cross-cultural validity: Available in over 30 languages, the WHO-5 has been validated across numerous countries and cultural contexts, including studies in Europe, North America, Asia, Africa, and South America. Its simple, universally relatable item content contributes to strong cross-cultural performance.

Despite its strengths, the WHO-5 has several important limitations that clinicians and researchers should consider:

• It is not a diagnostic instrument. The WHO-5 identifies low well-being, but low well-being is not synonymous with a specific psychiatric diagnosis. Many conditions — depression, anxiety disorders, burnout, grief, chronic pain, insomnia, and others — can produce low WHO-5 scores. A low score signals the need for further evaluation, not a diagnosis.
• Limited specificity for depression. While the WHO-5 is sensitive to depression, its specificity is moderate. This means it produces a notable rate of false positives — individuals who score below the cutoff but do not meet criteria for a depressive disorder upon further evaluation. This is a common trade-off in brief screening instruments and underscores the importance of follow-up assessment.
• Brevity limits depth. With only five items, the WHO-5 cannot capture the full complexity of psychological well-being. It does not assess social well-being, meaning and purpose, autonomy, or other dimensions that comprehensive well-being models (such as Ryff's model of psychological well-being or Seligman's PERMA model) include.
• Self-report biases. Like all self-report instruments, the WHO-5 is susceptible to response biases, including social desirability bias (the tendency to present oneself favorably), acquiescence bias, and the influence of transient mood states at the time of completion.
• Not designed for severe psychiatric populations. The WHO-5 was developed and primarily validated in general and primary care populations. Its performance may be less well characterized in populations with severe mental illness, acute psychiatric crises, or significant cognitive impairment that could affect the ability to accurately self-report.
• Cultural interpretation of items. Although the WHO-5 has been validated cross-culturally, the subjective meaning of statements like "feeling cheerful" or "calm and relaxed" may vary across cultural contexts. Clinicians should interpret scores with cultural sensitivity.

The WHO-5 serves multiple functions in clinical settings:

1. Routine screening in primary care: Perhaps the most common application, the WHO-5 is used as a first-line screener for reduced psychological well-being in general medical settings. In several European countries, particularly Denmark, the WHO-5 is integrated into routine primary care screening protocols. When a patient scores at or below the threshold of 50, the clinician initiates a more thorough assessment for depression and other potential underlying conditions.

2. Depression screening in medical populations: The WHO-5 is particularly valuable in populations with chronic medical conditions — diabetes, heart disease, cancer, neurological disorders — where depression is prevalent but often unrecognized. Its positive, non-stigmatizing language makes it more acceptable in these settings than symptom-focused depression questionnaires. For example, clinical guidelines for diabetes care have specifically recommended the WHO-5 as a depression screening tool.

3. Treatment monitoring: Because the WHO-5 is brief and re-administrable, clinicians use it to track changes in well-being over the course of treatment. A meaningful improvement (≥10 percentage points) can serve as an indicator of treatment response, while a declining score may prompt reassessment of the treatment plan.

4. Research outcome measure: The WHO-5 is widely used as a primary or secondary outcome measure in clinical trials evaluating interventions for depression, anxiety, chronic disease management, workplace wellness, and public health programs. Its brevity reduces participant burden, and its strong psychometric properties make it a credible endpoint.

5. Population-level surveillance: The WHO-5 has been incorporated into large-scale epidemiological surveys to assess population-level well-being and to identify groups at elevated risk for mental health difficulties.

Clinical decision-making: It is critical to understand that a WHO-5 score alone should never be the sole basis for initiating or withholding treatment. Scores should be integrated with clinical history, patient-reported symptoms, functional assessment, and — when indicated — structured diagnostic interviews. The WHO-5 is a screening and monitoring tool, not a replacement for comprehensive clinical evaluation.

The WHO-5 Well-Being Index is freely available in the public domain and can be accessed without any licensing fees or formal permissions for clinical or research use.

• Official source: The WHO-5 is available through the WHO Collaborating Centre in Mental Health at the Psychiatric Center North Zealand in Denmark. The Centre maintains an official website with the questionnaire in over 30 language versions.
• Format: The instrument is available in paper format and can be easily integrated into digital health platforms, electronic health records, and online survey tools.
• Scoring guidance: Scoring instructions are straightforward (sum raw scores and multiply by 4) and are included with the instrument. No manual purchase or specialized scoring software is required.

The open-access nature of the WHO-5 has been a major factor in its global dissemination. Clinicians, researchers, and public health organizations can adopt it without institutional purchasing barriers, making it one of the most accessible validated well-being instruments available worldwide.

If you have completed the WHO-5 — whether through a healthcare provider, a research study, or on your own — and your score suggests low well-being, it is important to understand what that means and what steps to consider.

A low score on the WHO-5 does not mean you have a mental health disorder. It means your self-reported well-being over the past two weeks is below the range associated with good psychological functioning. This could reflect many things — a temporary stressful period, a physical health problem affecting your energy and mood, sleep disruption, grief, burnout, or a pattern that is consistent with a clinical condition like depression.

Consider seeking a professional evaluation if:

• Your WHO-5 score is at or below 50 (on the 0–100 percentage scale), especially if this is a persistent pattern rather than a one-time result
• Your score is at or below 28, which suggests significantly compromised well-being
• You notice declining scores over repeated administrations
• Low well-being is accompanied by changes in sleep, appetite, concentration, motivation, or social functioning
• You experience persistent sadness, hopelessness, loss of interest, or thoughts of self-harm

A qualified mental health professional — such as a psychologist, psychiatrist, licensed clinical social worker, or your primary care physician — can conduct a comprehensive evaluation, determine whether your experiences align with a specific clinical condition, and discuss appropriate next steps, which may include therapy, medication, lifestyle modifications, or further assessment.

If you are in crisis or experiencing thoughts of suicide, contact the 988 Suicide and Crisis Lifeline (call or text 988 in the U.S.), go to your nearest emergency department, or call emergency services immediately.