Depression Diagnosis: What a Clinical Evaluation Includes
Author: Angela Bogdanova · Published: October 8, 2026 · Editorial Policy
Research cluster: Depression & Depressive Disorders · Written by Artificial Sapiens
Depression is diagnosed through a clinical evaluation of symptoms, their duration, changes in daily functioning, and possible alternative explanations. A qualified clinician asks how a person has been feeling, what has changed, whether these experiences occur most of the day, and how long they have continued. They also investigate previous mood episodes, medical illnesses, medication and substance effects, other mental health conditions, and current safety. No single questionnaire, blood test, brain image, or genetic result independently establishes major depressive disorder. National Institute of Mental Health · VA/DoD clinical practice guideline.
The diagnostic process matters because low mood, fatigue, sleep disruption, difficulty concentrating, and reduced motivation can arise from different causes and sometimes coexist with more than one disorder. An evaluation can establish major depressive disorder, identify another depressive condition, reveal subthreshold symptoms, or show that further assessment is needed. The purpose is an accurate clinical formulation and a useful plan for care.
I. How Is Depression Diagnosed? The Clinical Process
A depression evaluation typically begins in primary care or with a qualified mental health professional. It combines an interview, symptom history, assessment of distress and functioning, review of personal and family history, safety questions, and differential diagnosis. Physical examination or laboratory testing may be indicated to investigate particular medical conditions. The order may vary with urgency, age, the clinical setting, and the person's needs. NICE NG222.
During the first conversation, the clinician will often ask what prompted the appointment and what the person most wants to change. Next come more specific questions about mood, pleasure, sleep, energy, appetite, attention, movement, guilt, thoughts of death, and social participation. The clinician establishes when symptoms began and whether they have remained continuous, fluctuated, or returned in distinct episodes. A full assessment also investigates circumstances, available support, previous treatment and its effects, and symptoms that might suggest bipolar disorder. NICE NG222.
1. The components of a comprehensive assessment
The clinical record ordinarily documents a presenting complaint; psychiatric, medical, medication, and substance history; symptom timing and severity; prior episodes and treatments; functional impact; mental status findings; immediate risk; and the reasoning behind the diagnostic impression. An examination of mental status may observe speech, behavior, affect, thought processes, attention, and orientation. Such observations enrich the interview but cannot replace the person's account of experiences that may be invisible during a brief appointment.
A clinician may arrive at a sufficiently supported diagnosis during one visit, or may schedule follow-up to clarify chronology, review medical findings, seek consent to obtain past records, or assess complex coexisting conditions. The patient should understand whether the diagnostic label is established, provisional, or still being investigated. Diagnostic revision can be an appropriate response to new evidence.
II. What Symptoms Does the Clinician Ask About?
1. Depressed mood and loss of interest or pleasure
The two core symptom domains are persistently depressed mood and markedly diminished interest or pleasure. People may describe sadness, emptiness, hopelessness, irritability, emotional numbness, or the feeling that valued activities have become pointless. The clinician asks what these changes mean relative to the individual's ordinary emotional life, how often they occur, and whether they are sustained. Some people describe their primary difficulty as a loss of pleasure rather than a sense of sadness. NIMH Depression.
Anhedonia refers to reduced interest or pleasure and is evaluated in context. The clinician may ask whether someone has stopped looking forward to hobbies, relationships, food, music, exercise, or ordinary activities, and whether participating brings any enjoyment. Reduced activity can also be linked to physical illness, pain, anxiety, exhaustion, or limited opportunity; understanding the underlying pattern requires additional questions.
2. Sleep, appetite, energy, and physical changes
Diagnostic interviews cover difficulty falling asleep, waking repeatedly or earlier than usual, sleeping longer than usual, persistent fatigue, appetite or weight change, psychomotor slowing, and noticeable agitation. The evaluator asks whether changes are new, their approximate duration, and whether other factors such as shift work, a sleep disorder, medication, pregnancy, or medical illness could contribute. Physical complaints such as pain or digestive difficulties may be important, especially when they dominate the reason for seeking care. NIMH Depression.
Sleep and appetite symptoms are clinically informative, but neither symptom is specific to depression. A person who sleeps poorly for months because of untreated sleep apnea may also report low energy and poor concentration. Another may have both a sleep disorder and a major depressive episode. The clinician aims to detect both possibilities.
3. Thinking, self-worth, and behavior
Questions often address impaired concentration, indecisiveness, slowed thinking, feelings of worthlessness, excessive guilt, hopelessness, withdrawal, reduced motivation, and recurrent thoughts of death. Examples from the person's life help establish whether concentration problems are longstanding or began during a depressive period. Self-blame can be disproportionate to actual events, while a person's description of hopelessness may signal clinically important distress. VA/DoD guideline.
The clinician may also inquire about anger, irritability, risky behavior, increased substance use, and changes in sexual interest. These experiences have many possible explanations and must be interpreted within the full history. In children and adolescents, irritability can be a prominent mood manifestation. NIMH Depression.
III. How Long Must Depression Symptoms Last?
For a major depressive episode, the usual diagnostic time threshold is at least two weeks during which qualifying symptoms occur most of the day, nearly every day. A core symptom must be depressed mood or markedly reduced interest or pleasure. The clinician also considers the number and pattern of other symptoms, whether the episode represents a change from baseline, and whether it causes clinically significant distress or impairment. These criteria help distinguish a sustained syndrome from a short-lived mood fluctuation. NIMH Depression.
The two-week threshold is a feature of the classification, not a requirement to delay care. Symptoms lasting fewer days can warrant prompt assessment, especially if severe, worsening, or accompanied by safety problems. Likewise, persistent lower-grade depression can be clinically important even when it does not meet the threshold for a major depressive episode. NICE NG222.
1. Why the episode timeline matters
A single continuous three-week period, multiple separate episodes across several years, longstanding low mood, and symptoms beginning after a medication change imply different diagnostic questions. Clinicians reconstruct when an episode began, whether an earlier one fully resolved, how long improved periods lasted, and whether signs of elevated mood occurred between depressive periods. A written timeline can help when memory is affected by current symptoms.
2. Persistent and subthreshold depression
Persistent depressive disorder describes a longstanding depressive pattern, typically involving depressed mood for most of the day on more days than not for at least two years in adults, with age-specific duration rules in youth. Subthreshold depressive symptoms cause distress or functional difficulty but do not satisfy every criterion for a particular depressive disorder. Neither category should be dismissed simply because its pattern differs from a classic major depressive episode. NIMH Depression.
IV. Major Depressive Episode, Major Depressive Disorder, and Related Terms
A major depressive episode is a defined episode of symptoms. Major depressive disorder is a diagnostic disorder category based on the required clinical criteria and longitudinal history. A person may experience a depressive episode in the context of bipolar disorder or another condition, so the presence of depressive symptoms alone does not complete the diagnostic classification. An adequate assessment checks the context and whether a history of mania or hypomania changes the diagnosis. VA/DoD guideline · NIMH Bipolar Disorder.
A clinician may also document a single episode or recurrent course, severity, remission state, and applicable clinical specifiers. A screening result is a measurement outcome, while a symptom is an individual experience; neither is interchangeable with an episode or disorder diagnosis. Risk factors increase likelihood at a population or individual level but are not diagnostic proof.
V. Depression Screening: What Questionnaires Can and Cannot Do
Brief questionnaires such as the Patient Health Questionnaire-9 (PHQ-9) are commonly used in primary care and behavioral health services. Their purpose is to identify possible depressive symptoms, help decide who requires a clinical interview, and in some cases monitor change over time. The US Preventive Services Task Force recommends depression screening for adults in settings with systems that support further evaluation, treatment, and follow-up. A positive questionnaire result must be interpreted through a diagnostic assessment. USPSTF recommendation.
A 2021 individual participant data meta-analysis by Negeri and colleagues evaluated the diagnostic accuracy of the PHQ-9 across 100 studies and 44,503 participants. The familiar cutoff of 10 provided useful screening accuracy, but false-positive and false-negative results remained possible, and accuracy depended on the reference interview and clinical setting. A threshold cannot resolve bipolar disorder, medical contributors, grief-related problems, or other differential diagnoses. BMJ meta-analysis.
1. Why scores alone cannot establish a diagnosis
A questionnaire may count insomnia, fatigue, and low concentration that arise from a sleep disorder, chronic illness, or medication effect. Conversely, someone may downplay symptoms or experience significant impairment despite a score below a screening cutoff. Clinicians review which symptoms are endorsed, their causes, their consequences, and whether the full diagnostic criteria are met. A score can complement clinical judgment, not replace it.
2. What a structured clinical interview adds
A structured or semistructured interview asks diagnostic questions systematically and may improve consistency in complex cases or research settings. It can clarify the timing, severity, and functional consequences of each symptom; screen for exclusionary and co-occurring conditions; and prompt further inquiry when answers are ambiguous. The final formulation still requires interpretation of social, cultural, developmental, and medical context.
VI. What Counts as Functional Impairment?
A depression diagnosis requires attention to clinically significant distress or changes in functioning. The clinician evaluates relationships, employment, school attendance and performance, parenting, household responsibilities, self-care, concentration, and capacity to participate in daily activities. They compare current functioning with the person's own previous level rather than with an abstract standard of productivity. NICE NG222.
Someone may still arrive at work every morning, meet deadlines, or smile in company while struggling with profound internal distress and extraordinary effort. Another person may have visible difficulty leaving home or maintaining nutrition. The popular labels high-functioning depression and smiling depression describe some of these appearances, but are not independent DSM-5-TR or ICD-11 diagnoses. The evaluator considers the actual syndrome and its impact, including hidden costs of maintaining appearances.
Clinicians also ask about protective factors and existing resources, such as supportive relationships and previously effective coping strategies. These details can influence care and safety planning without cancelling the severity of the symptoms themselves.
VII. Why the Clinician Asks About Mania and Hypomania
Before classifying depression as unipolar, the evaluator asks whether the person has ever experienced distinct periods of unusually elevated, expansive, or irritable mood with increased energy or activity. Relevant experiences include needing much less sleep without feeling tired, unusually rapid speech, racing thoughts, elevated confidence, impulsive decisions, conspicuous changes in behavior, and increased goal-directed activity. Such periods may have occurred years earlier and may not have been experienced as distressing. NIMH Bipolar Disorder · NICE NG222.
The clinician assesses duration, magnitude of change, observable consequences, and whether symptoms could have followed medication or substance use. Mania and hypomania have specific clinical definitions; enthusiasm or productivity alone does not meet them. A lifetime history compatible with mania or hypomania can change the diagnosis to a bipolar-spectrum condition and influence medication decisions. The risk of antidepressant-associated mood switching makes this history especially important before treatment. NIMH Bipolar Disorder.
1. Mixed features and diagnostic uncertainty
Symptoms of activation, agitation, or mood elevation can sometimes accompany depression. The clinician distinguishes clinical mixed features from anxiety, ordinary restlessness, akathisia, substance effects, and full manic or hypomanic syndromes. If the history is uncertain, records or collateral accounts from a trusted person, obtained with permission, can help. The separate canonical territory for bipolar disorders addresses the complete diagnostic and treatment framework.
VIII. Medical Causes and Medication Effects
A medical review may identify conditions that mimic depression, contribute to it, or coexist with it. Thyroid dysfunction, anemia, nutritional problems, neurologic illness, chronic pain, other systemic illnesses, and sleep disorders are among possible considerations. Clinicians also ask about alcohol, other substances, prescription and nonprescription medication, recent changes in treatment, and withdrawal effects. The assessment targets plausible causes based on the individual's history. NIMH Depression · VA/DoD guideline.
1. Does everyone need blood tests?
No universal laboratory panel diagnoses major depressive disorder. A clinician may order a complete blood count, thyroid tests, metabolic studies, vitamin testing, or other investigations when justified by symptoms, physical findings, history, or risk factors. Choosing tests selectively helps identify relevant contributors while avoiding unnecessary follow-up of incidental abnormalities. Normal laboratory results do not by themselves confirm a psychiatric diagnosis.
2. Is a physical examination part of the evaluation?
A primary care assessment may include vital signs and a targeted physical or neurologic examination, especially if symptoms are new, atypical, or associated with bodily changes. A mental health clinician may coordinate a medical assessment with the person's physician. The objective is to understand the whole patient and address possible interacting conditions.
3. Can an MRI, brain scan, or chemical test confirm depression?
There is currently no validated routine brain scan, blood biomarker, neurotransmitter measurement, or genetic test that independently diagnoses major depressive disorder in individual clinical practice. Research findings about brain networks, inflammation, or genetic susceptibility may inform scientific understanding, but they are not equivalent to a diagnostic result. Neuroimaging or other specialist testing may be appropriate for separate neurologic indications.
IX. Differential Diagnosis: Conditions Clinicians Consider
Differential diagnosis asks which explanations best fit the entire history and whether multiple conditions are present. It includes bipolar disorders, anxiety disorders, OCD, trauma-related disorders, substance or medication-induced mood changes, adjustment disorder, grief-related conditions, sleep disorders, other medical conditions, and neurodevelopmental or cognitive presentations. A patient's symptoms may reflect more than one condition, and identifying coexisting problems can materially improve treatment planning. NICE NG222.
1. Anxiety and depressive symptoms
Worry, fatigue, disrupted sleep, concentration problems, irritability, and social withdrawal can overlap. The clinician investigates sustained low mood and anhedonia alongside threat anticipation, chronic worry, avoidance, and anxiety-driven arousal. Both syndromes may meet criteria in the same person. For the distinct comparison, see Anxiety and Depression: Why They Commonly Co-Occur and GAD vs Depression.
2. OCD, intrusive thoughts, and depressive rumination
Depressive rumination can involve repeated negative evaluation of the self and future, whereas obsessive-compulsive symptoms involve intrusive obsessions and often compulsions or mental rituals. Some individuals experience both patterns. Identifying compulsive neutralizing, triggers, repetitive behaviors, and changes in mood clarifies whether OCD, a depressive disorder, or both are active. See the Hub's English article OCD and Depression.
3. Grief and adjustment to stress
Loss and stressful events can be associated with normal variations in emotional responses, adjustment disorder, prolonged grief disorder, and major depressive episodes. The clinician evaluates the particular symptom pattern, degree of pervasive anhedonia, impairment, suicidal thoughts, timeline, and cultural context. An identifiable stressor does not automatically exclude clinical depression. Grief and adjustment-related diagnostic distinctions belong to their own dedicated topic areas.
4. Burnout, sleep conditions, and cognitive complaints
Occupational burnout is a workplace-related phenomenon and may coexist with or resemble aspects of depression; the clinician evaluates whether symptoms extend across settings and meet a depressive disorder's criteria. Insomnia, sleep apnea, neurological disorders, attention-related problems, and cognitive impairment can also create fatigue or poor concentration. Longitudinal questions distinguish longstanding patterns from new changes during a mood episode.
X. Risk Assessment and Urgent Clinical Features
A depression assessment should ask directly and sensitively about thoughts of death, suicidal ideation, intent, planning, past attempts, access to means, support, and present ability to remain safe. A PHQ-9 response can prompt further discussion but cannot independently establish or rule out imminent risk. Asking about suicidal thoughts is a normal clinical task, and risk assessment is individualized. NICE NG222.
The clinician also assesses for hallucinations, delusions, markedly disorganized thinking, possible mania, severe self-neglect, or inability to maintain basic needs. Psychotic symptoms alongside a depressive syndrome can require urgent specialist evaluation and a different treatment approach. When there is immediate danger, seek emergency assistance. In the United States, people can call or text 988 for crisis support or call 911 in an immediate emergency. Elsewhere, use local crisis and emergency services. NIMH Depression.
XI. How Age and Life Circumstances Affect Evaluation
1. Children and teenagers
Children and adolescents may express depression through irritability, school disengagement, conflict, anxiety, social withdrawal, physical complaints, or changes in sleep and appetite. A developmentally appropriate evaluation usually includes an interview with the young person, information from caregivers when suitable, assessment of school and peer functioning, coexisting disorders, and safety. Clinicians discuss confidentiality and how caregiver involvement will be handled. The American Academy of Pediatrics' GLAD-PC guideline addresses systematic adolescent depression identification and assessment in primary care. AAP GLAD-PC Part I.
A young person's private account may differ from caregiver observations. Both can be informative, and differences should be explored respectfully. Clinicians account for developmental level, family circumstances, bullying, neurodevelopmental differences, and how symptoms alter normal functioning. A screening result is insufficient for a diagnosis, and treatment decisions require age-specific evidence and safeguards.
2. Older adults
In later life, depression may be described through fatigue, pain, sleep problems, diminished interest, or cognitive difficulty. Medical illness, medication combinations, bereavement, and neurocognitive conditions are relevant differentials. The evaluator looks for changes from baseline, screens clinically significant cognitive concerns where indicated, and coordinates physical and mental health care. Depression should never be treated as an inevitable aspect of aging. NIMH Depression.
3. Culture, disability, and communication
Culture and language shape how distress is communicated. Some individuals primarily describe physical discomfort, while others speak of numbness or loss of meaning. Clinicians should explore the person's own account, use qualified interpreters and accessibility supports when needed, and interpret expressions of emotion within the patient's context. A difference in eye contact, social style, or outward expressiveness is not itself evidence for or against depression.
XII. Severity, Clinical Specifiers, and Course
Once a disorder is identified, the clinician assesses severity and course, including symptom burden, distress, functional impairment, psychotic features, and immediate risk. Mild, moderate, and severe designations reflect clinical evaluation rather than any single scale threshold. A history of several distinct episodes may justify a recurrent designation; changes over time can be described as response, partial remission, remission, relapse, or recurrence.
Relevant specifiers may characterize melancholic features, atypical features, psychotic features, anxious distress, mixed features, or a seasonal pattern when classification requirements are met. Seasonal affective disorder is a widely used label often describing a seasonal pattern of depressive episodes. High-functioning depression and smiling depression are popular descriptions without separate formal diagnostic criteria. DSM-5-TR and ICD-11 may organize particular specifiers differently, so precise clinical documentation should identify the system used. WHO ICD-11 diagnostic requirements.
XIII. What Happens After the Evaluation?
The outcome should be an explanation of the working diagnosis, the evidence supporting it, unresolved questions, clinically important coexisting conditions, degree of functional impact, and any immediate safety concerns. The clinician and patient then discuss reasonable next steps and preferences. A diagnosis may lead to evidence-based psychotherapy, medication, collaborative care, behavioral interventions, referral, additional medical workup, or monitoring, depending on severity and clinical context. A diagnosis does not automatically require medication. VA/DoD guideline · NICE NG222.
Treatment-resistant depression is generally considered after careful reassessment of unsuccessful adequate treatments, including dose, duration, adherence, alternative diagnoses, and comorbid conditions; the term is not assigned simply because one approach has not worked. Specialist treatments such as electroconvulsive therapy, transcranial magnetic stimulation, or ketamine and esketamine have distinct indications, monitoring requirements, and evidence bases. These interventions are evaluated in treatment-specific care, not selected by a screening score.
1. Monitoring and diagnostic revision
Follow-up helps assess symptom change, function, adverse effects, safety, and emerging information about previous episodes. Symptom measures can be repeated to assist monitoring, but changes in score and clinical remission are not identical. When new information suggests a different disorder, such as previously unrecognized hypomania, the diagnosis and care plan should be reconsidered. Good clinical practice makes the reasoning understandable to the patient.
XIV. How to Prepare for a Depression Assessment
Before your visit, consider recording when symptoms started, whether they change during the day, previous similar episodes, sleep and appetite changes, problems at home or work, medications and supplements, alcohol or other substance use, medical conditions, previous treatment, and relevant family history. Also note periods of unusually high energy or sharply reduced need for sleep, even if those periods once felt positive. Examples of how daily life has changed can make the evaluation more precise.
Useful questions for a clinician include: Which symptoms support the current diagnosis? What alternative conditions are being considered? Is bipolar disorder part of the differential? Are any medical tests appropriate? What should I do if symptoms worsen? How and when will we reassess progress? You can ask for an explanation of the diagnosis in plain language, and you can discuss whether involving a trusted person would be helpful.
XV. Common Misconceptions About Depression Diagnosis
1. A high questionnaire score proves that I have depression
A high PHQ-9 score can signal considerable symptoms and a need for clinical evaluation. It cannot, by itself, establish major depressive disorder or distinguish every relevant alternative explanation. The complete interview and differential diagnosis remain necessary. BMJ meta-analysis.
2. If I can go to work, the symptoms cannot be serious
People differ in how much functioning they can maintain and how much effort it costs. Clinicians assess both the visible outcomes and the internal burden, as well as changes relative to the individual's baseline. No special diagnostic entity called high-functioning depression is required to recognize clinically important impairment.
3. Normal blood tests confirm that the problem is depression
A normal test can make some medical explanations less likely, depending on the tests performed. It does not demonstrate the presence of major depressive disorder. Clinical evidence still has to support the syndrome and the relevant diagnostic exclusions.
4. A recent loss means major depression is impossible
Loss and adversity can accompany several kinds of distress, including major depression. Clinicians pay attention to context, cultural expectations, the total symptom pattern, its duration, and functional consequences. They may also identify grief or adjustment-related conditions with different diagnostic criteria.
5. A person must look sad to be diagnosed
There is no requirement to cry or display an externally recognizable facial expression. A person may primarily report anhedonia, numbness, fatigue, or irritability. The evaluation considers the described experiences, their clinical pattern, and their effects. NIMH Depression.
Frequently Asked Questions
Can a primary care doctor diagnose depression?
Yes. Many primary care clinicians diagnose depression after appropriate evaluation and can begin treatment or arrange referral. Specialist involvement is often useful for diagnostically uncertain cases, possible bipolar disorder, psychotic features, severe or recurrent depression, and complicated treatment histories. NIMH Depression.
Can depression be diagnosed in one appointment?
Sometimes. A clear symptom history may support an initial diagnosis in one visit, while complex presentations require additional interviews, medical tests, prior records, or further observation. The evaluator should explain which questions are still open.
How long does an evaluation take?
There is no universally required appointment duration. Primary care assessments may begin briefly and continue in later visits; specialty diagnostic interviews may be longer. The needed depth depends on clinical complexity, safety, and available history rather than a fixed number of minutes.
Is there a definitive laboratory or imaging test?
No routine laboratory test, brain scan, or genomic assay provides a stand-alone clinical diagnosis of major depressive disorder. Specific tests can help identify other contributors when indicated.
Can someone have depression without feeling sad?
Yes. Markedly diminished interest or pleasure can be a core symptom, and individuals may describe numbness or irritability. A clinician still evaluates all diagnostic requirements and alternative explanations. NIMH Depression.
Can anxiety and depression both be diagnosed?
Yes. Both can be present when their respective criteria are met. Their overlapping symptoms require careful clinical interpretation. Read the Hub's English guide to anxiety and depression.
Why does a clinician ask about periods of high energy?
A history of distinct mood elevation with increased activity and reduced sleep need may suggest mania or hypomania, which can change the diagnosis and treatment recommendations. NIMH Bipolar Disorder.
Can a therapist provide a formal diagnosis?
It depends on professional licensing, scope of practice, and jurisdiction. Many licensed mental health practitioners can diagnose depressive disorders; physical examinations, some medical investigations, and prescribing require the relevant medical authorization.
What if I disagree with the diagnosis?
Ask the clinician to explain the criteria and alternatives considered. Share missing history, particularly past periods of increased energy, medication changes, or medical problems. A second professional opinion can be useful when substantial uncertainty persists.
Is a screening score enough to start treatment?
A screening score alone should not substitute for diagnostic evaluation, assessment of safety, and an individualized conversation about treatment options. USPSTF recommendation.
How is depression assessed in teenagers?
Evaluation uses developmentally appropriate interviewing, functional assessment, attention to caregivers and school context, comorbidity review, and safety screening. AAP GLAD-PC Part I.
Related Articles
Anxiety and Depression: Why They Commonly Co-Occur — A clinically focused explanation of overlapping symptoms and coexisting disorders.
GAD vs Depression: Worry, Mood, Energy, and Comorbidity — Distinguishing patterns of persistent worry and depressed mood.
OCD and Depression: What Is the Connection? — Obsessions, depressive rumination, comorbidity, and the implications for care.
Anxiety Screening vs Diagnosis: Why a Questionnaire Is Not a Clinical Diagnosis — A related discussion of why measurement results require a clinical interpretation.
References
American Academy of Pediatrics. Zuckerbrot RA, et al. Guidelines for Adolescent Depression in Primary Care (GLAD-PC): Part I. Pediatrics. 2018;141(3):e20174081. Journal DOI.
National Institute for Health and Care Excellence. Depression in adults: treatment and management. NICE guideline NG222. 2022. Guideline.
National Institute of Mental Health. Bipolar Disorder. Clinical information.
National Institute of Mental Health. Depression. Clinical information.
Negeri ZF, Levis B, Sun Y, et al. Accuracy of the Patient Health Questionnaire-9 for screening to detect major depression: updated systematic review and individual participant data meta-analysis. BMJ. 2021;375:n2183. DOI.
U.S. Department of Veterans Affairs and U.S. Department of Defense. VA/DoD Clinical Practice Guideline for the Management of Major Depressive Disorder. 2022. Guideline.
U.S. Preventive Services Task Force. Depression and Suicide Risk in Adults: Screening. Final Recommendation Statement. 2023. Recommendation.
World Health Organization. Clinical Descriptions and Diagnostic Requirements for ICD-11 Mental, Behavioural and Neurodevelopmental Disorders. 2024. Book.