Diagnostic Classification Systems — MCQs
Which of the following is a validated screening tool for alcohol use disorder?
Which of the following is NOT a core component of the WHO's global STI control strategy?
A 41 year old married female presented with headache for the last 6 months. She had several consultations. All her investigations were found to be within normal limits. She still insists that there is something wrong in her head and seeks another consultation. The most likely diagnosis is:
A patient complains of sadness of mood, increased lethargy, early morning awakening, loss of interest and reports no will to live and hears voices asking her to kill self. What is the diagnosis?
Which of the following describes the purpose of ICD-10 codes?
What is the structure of the ICD-10 classification system?
The comparison of mortality rates between two countries requires the application of direct standardization. Which of the following parameters makes it necessary to have standardization?
Which of the following disorders is classified under somatic symptom and related disorders in the DSM-5?
Which of the following is false about bipolar disorder?
Which of the following is the most prevalent psychiatric disorder in the general population?
Diagnostic Classification Systems Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following is a validated screening tool for alcohol use disorder?
- A. AUDIT
- B. CAGE questionnaire
- C. SADQ
- D. All of the options (Correct Answer)
Explanation: ***CAGE questionnaire and AUDIT*** - Both **CAGE** and **AUDIT** are widely validated screening tools specifically designed for alcohol use disorder [1]. - **CAGE** is a brief 4-item tool focusing on **C**ut down, **A**nnoyed, **G**uilty, and **E**ye-opener - ideal for quick screening in clinical settings [1]. - **AUDIT** (Alcohol Use Disorders Identification Test) is a comprehensive 10-item tool assessing consumption patterns, drinking behaviors, and alcohol-related problems. - AUDIT is considered the **gold standard** for screening and can assess risk levels and severity. *Why not SADQ alone?* - **SADQ** (Severity of Alcohol Dependence Questionnaire) is primarily a **severity assessment tool**, not a screening tool. - It is a 20-item instrument used to measure the **degree of alcohol dependence** in individuals already identified with alcohol problems. - While valuable for treatment planning, SADQ is more detailed and designed for assessment rather than initial screening [1]. - However, all three tools are validated and used in alcohol use disorder evaluation - CAGE and AUDIT for screening, SADQ for severity assessment.
Question 2: Which of the following is NOT a core component of the WHO's global STI control strategy?
- A. Case management
- B. Universal mandatory screening (Correct Answer)
- C. Strategic information systems
- D. Prevention services
Explanation: ***Universal mandatory screening*** - While screening is part of STI control, **universal mandatory screening** for all STIs in the general population is not a core component of the WHO's strategy due to feasibility, cost, and ethical considerations. - The strategy emphasizes **targeted screening** for at-risk populations and opportunistic screening. *Case management* - **Case management**, including accurate diagnosis and effective treatment, is a critical component for managing current infections and preventing further transmission. - This involves syndromic or etiologic approaches to treatment and partner notification. *Strategic information systems* - **Strategic information systems** are essential for monitoring trends, evaluating interventions, and informing policy decisions related to STI control. - This includes surveillance data, program monitoring, and research. *Prevention services* - **Prevention services** are a cornerstone of the WHO's strategy, aiming to reduce the incidence of new infections. - These services encompass health education, condom promotion and distribution, vaccination, and pre-exposure prophylaxis (PrEP).
Question 3: A 41 year old married female presented with headache for the last 6 months. She had several consultations. All her investigations were found to be within normal limits. She still insists that there is something wrong in her head and seeks another consultation. The most likely diagnosis is:
- A. Illness Anxiety Disorder (Correct Answer)
- B. Phobia
- C. Psychogenic headache
- D. Depression
Explanation: ***Illness Anxiety Disorder*** - This patient exhibits persistent **preoccupation with having a serious illness** despite **repeated medical evaluations** showing no underlying pathology. - She continues to **seek multiple consultations**, demonstrating **excessive health-related behaviors** characteristic of health anxiety. - Despite reassurance and normal investigations, she **insists something is wrong**, which is the core feature of this disorder. - Note: The presence of headache doesn't exclude this diagnosis; the key is the **disproportionate anxiety and health-seeking behavior** relative to the symptom. *Phobia* - Phobias involve an **intense, irrational fear** of a specific object or situation (e.g., agoraphobia, social phobia). - The patient's concern is about having an illness and physical symptoms, not a fear of a specific trigger or situation. *Psychogenic headache* - This is a **symptom description**, not a psychiatric disorder diagnosis. - While the headache may have psychological factors, the question asks for the **disorder** that best explains the overall clinical picture. - The primary pathology here is the **persistent health anxiety and reassurance-seeking behavior**, not just the headache itself. *Depression* - Although **depression can present with somatic symptoms** like headaches, the **core features of major depression** are not mentioned (e.g., persistent low mood, anhedonia, sleep/appetite changes, hopelessness). - The patient's **preoccupation with having a disease** despite medical reassurance is more characteristic of Illness Anxiety Disorder than depression alone.
Question 4: A patient complains of sadness of mood, increased lethargy, early morning awakening, loss of interest and reports no will to live and hears voices asking her to kill self. What is the diagnosis?
- A. Schizophrenia
- B. Major depressive disorder plus psychosis (Correct Answer)
- C. Schizoaffective disorder
- D. Schizotypal personality disorder
Explanation: ***Major depressive disorder plus psychosis*** - The patient presents with classic symptoms of **major depressive disorder**, including persistent sadness, **anhedonia (loss of interest)**, **lethargy**, and **early morning awakening**. - The presence of **auditory hallucinations** (hearing voices asking her to kill herself) indicates **psychotic features** accompanying the severe depression, leading to the diagnosis of major depressive disorder with psychotic features. *Schizophrenia* - While schizophrenia involves psychosis, the primary presentation here is a prominent **depressive syndrome** rather than the typical **positive symptoms (delusions, hallucinations)**, **negative symptoms (alogia, avolition)**, and **disorganized thought** processes characteristic of schizophrenia. - The depressive symptoms are too pervasive and central to the clinical picture to be solely schizophrenia. *Schizoaffective disorder* - This disorder requires a period of **at least two weeks of psychotic symptoms** (hallucinations or delusions) **without prominent mood symptoms**, which is not described. - In this case, the **psychotic symptoms are congruent with the depressed mood** (e.g., voices urging self-harm, reflecting hopelessness), rather than independent. *Schizotypal personality disorder* - This is a pervasive pattern of **social and interpersonal deficits** marked by acute discomfort with, and reduced capacity for, close relationships, as well as by **cognitive or perceptual distortions** and eccentricities of behavior. - It does not involve persistent, severe depressive episodes with overt psychotic symptoms as described, nor significant functional impairment to the extent seen here.
Question 5: Which of the following describes the purpose of ICD-10 codes?
- A. Used for mortality and morbidity statistics (Correct Answer)
- B. Published by WHO
- C. Contains alphanumeric codes
- D. Consists of 21 chapters
Explanation: ***Used for morbidity statistics*** - ICD-10 codes primarily serve to classify diseases and health problems for **mortality and morbidity statistics**. - They provide a standardized system for tracking and reporting causes of illness and death, crucial for public health surveillance and research. *Published by WHO* - While it's true that the **ICD-10 (International Classification of Diseases, 10th Revision)** is developed and published by the **World Health Organization (WHO)**, this describes its origin, not its primary purpose. - The publication aspect is a characteristic, not the fundamental reason for its existence or use. *Contains alphanumeric codes* - ICD-10 codes are indeed **alphanumeric**, with the first character being a letter followed by numbers. - This describes the **structure** of the codes, not their purpose in a healthcare or statistical context. *Consists of 21 chapters* - The **ICD-10 classification** is organized into **21 chapters**, each covering a specific category of diseases or health conditions. - This detail describes the **organization** or **scope** of the classification system, rather than its overarching purpose.
Question 6: What is the structure of the ICD-10 classification system?
- A. Consists of 21 chapters
- B. Revised every 10 years
- C. Arranged in 3 volumes (Correct Answer)
- D. Produced by the World Health Organization
Explanation: ***Arranged in 3 volumes*** - The **ICD-10 classification system** is traditionally published in **three volumes** for ease of use. - **Volume 1** lists diseases alphabetically, **Volume 2** provides instructional and guidelines, and **Volume 3** has an alphanumeric index. *Revised every 10 years* - ICD classifications are revised periodically, but there is **no fixed 10-year revision cycle**; updates occur as needed. - For instance, ICD-9 was in use for many decades before ICD-10 and then ICD-11 was released significantly later. *Consists of 22 chapters* - The ICD-10 classification system is organized into **21 chapters**, each covering a specific range of diseases or health problems. - These chapters categorize diseases and conditions based on criteria such as etiology, body system, or type of injury. *Produced by the World Health Organization* - The **World Health Organization (WHO)** is indeed responsible for developing and maintaining the ICD system. - However, this option describes the **originator** of the system, not its structural arrangement.
Question 7: The comparison of mortality rates between two countries requires the application of direct standardization. Which of the following parameters makes it necessary to have standardization?
- A. Numerators
- B. Denominators
- C. Causes of death
- D. Age distributions (Correct Answer)
Explanation: ***Age distributions*** - **Direct standardization** is crucial when comparing mortality rates between populations with different **age structures**. A population with a larger proportion of older individuals will naturally have a higher crude mortality rate regardless of underlying health. - By standardizing for age, we can remove the confounding effect of age and get a more accurate comparison of **disease burden** or **healthcare effectiveness**. *Numerators* - The numerator in mortality rates typically represents the **number of deaths**, which is a direct count and does not inherently require standardization to be understood. - While the numerator is essential for calculating the rate, its raw value doesn't introduce bias in comparison as much as population characteristics. *Denominators* - The denominator represents the **total population at risk**, which is used in calculating crude mortality rates. - While vital for rate calculation, the denominator itself doesn't directly cause a need for standardization; rather, the **composition** of the denominator (e.g., age groups) is the critical factor. *Causes of death* - While comparing **specific causes of death** can be informative, the "cause of death" itself does not necessitate overall mortality rate standardization. - Standardization focuses on population characteristics (like age) that influence the overall likelihood of death, not the specific etiology.
Question 8: Which of the following disorders is classified under somatic symptom and related disorders in the DSM-5?
- A. Post-Traumatic Stress Disorder (PTSD)
- B. Phobic disorders (e.g., social anxiety disorder)
- C. Conversion disorder (functional neurological symptom disorder) (Correct Answer)
- D. Obsessive-Compulsive Disorder (OCD)
Explanation: ***Conversion disorder (functional neurological symptom disorder)*** - **Conversion disorder** is characterized by neurological symptoms (e.g., paralysis, blindness) that are **incompatible with recognized neurological or medical conditions**, yet are not intentionally produced. - It falls under **somatic symptom and related disorders** because the primary features are physical symptoms causing distress or functional impairment, rather than being malingered or feigned. *Phobic disorders (e.g., social anxiety disorder)* - **Phobic disorders** are classified under **anxiety disorders** in the DSM-5, not somatic symptom and related disorders. - They are primarily characterized by **intense, irrational fears** of specific objects or situations, leading to avoidance rather than prominent physical symptoms without a medical cause. *Post-Traumatic Stress Disorder (PTSD)* - **PTSD** is classified under **trauma- and stressor-related disorders** in the DSM-5, distinguished by symptoms developing after exposure to a traumatic event. - Its core features include **intrusive memories, avoidance, negative alterations in cognition and mood, and alterations in arousal and reactivity**, rather than unexplained physical symptoms. *Obsessive-Compulsive Disorder (OCD)* - **OCD** is classified under **obsessive-compulsive and related disorders** in the DSM-5. - It is primarily characterized by the presence of **obsessions (recurrent, intrusive thoughts)** and/or **compulsions (repetitive behaviors or mental acts)**, which are distinct from somatic symptoms.
Question 9: Which of the following is false about bipolar disorder?
- A. Unipolar mania is more common than bipolar disorder (Correct Answer)
- B. Genetic factors play important role
- C. Rapid cycling is more common in females
- D. Age of onset is earlier than unipolar depression
Explanation: ***Unipolar mania is more common than bipolar disorder*** - This statement is **false** because **unipolar mania is extremely rare**, while **bipolar disorder (which includes both manic and depressive episodes)** is significantly more common. - **Unipolar mania** refers to recurrent manic episodes without any depressive episodes, a presentation that is seldom observed clinically. *Genetic factors play important role* - This statement is **true**, as **bipolar disorder has a strong genetic component**, with **heritability estimated between 60-80%**. - **First-degree relatives** of individuals with bipolar disorder are at a significantly higher risk of developing the condition. *Rapid cycling is more common in females* - This statement is **true**; **rapid cycling (4 or more mood episodes per year)** occurs more frequently in females with bipolar disorder. - **Women with bipolar disorder** are also more likely to experience **mixed features** and **more depressive episodes** compared to males. *Age of onset is earlier than unipolar depression* - This statement is **true** because the **typical age of onset for bipolar disorder is in early adulthood (late teens to early 20s)**, whereas **unipolar depression often has a later average onset**, though both can occur at any age. - An earlier age of onset in bipolar disorder is linked to poorer prognosis and more severe illness course.
Question 10: Which of the following is the most prevalent psychiatric disorder in the general population?
- A. Schizophrenia
- B. Mania
- C. Anxiety disorder (Correct Answer)
- D. Depression
Explanation: ***Anxiety disorder*** - **Anxiety disorders** are collectively the most prevalent psychiatric disorders in the general population, affecting approximately **10-30% of individuals** during their lifetime. - This category includes **specific phobias, social anxiety disorder, panic disorder, generalized anxiety disorder, and others**, which together have the highest prevalence among all psychiatric conditions. - Epidemiological studies consistently show that **anxiety disorders surpass depression** in terms of overall prevalence in community samples. *Depression* - **Major depressive disorder** is highly prevalent (lifetime prevalence approximately 10-15%) and is the **leading cause of disability worldwide**. - While extremely common and clinically significant, it is slightly less prevalent than anxiety disorders when considering community-based epidemiological data. - Depression often occurs **co-morbidly with anxiety disorders**, further emphasizing the importance of both conditions. *Schizophrenia* - **Schizophrenia** is a severe chronic mental illness with a much lower prevalence, affecting approximately **0.3-0.7%** of the general population. - Despite its significant impact on affected individuals and families, its overall prevalence is relatively low compared to mood and anxiety disorders. *Mania* - **Mania** is a mood state characteristic of **bipolar disorder**, which has a prevalence of approximately **1-2%** of the population. - This is considerably lower than the prevalence of both anxiety disorders and major depressive disorder.
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