UPSC-CMS 2023 Practice Questions

Q: The "risk of a disease" is measured by the

Incidence Rate. ***Incidence Rate*** - The **incidence rate** directly measures the frequency of **new cases** of a disease in a population over a specified period. - It is used to estimate the **risk** or probability of developing a disease, as it quantifies how quickly people are contracting the disease within the at-risk population. - **Formula:** (Number of new cases during time period / Population at risk) × multiplier - This is the epidemiologically correct measure of disease risk. *Prevalence Rate* - The **prevalence rate** measures the **total number of existing cases** (both new and old) of a disease in a population at a specific point in time or over a period. - It reflects the **burden** of a disease, not the risk of acquiring it, as it includes individuals who may have developed the disease much earlier. - Prevalence = Incidence × Duration of disease. *Case Fatality Rate* - The **case fatality rate** (CFR) measures the **proportion of individuals diagnosed with a disease who die from that disease** within a specified period. - It reflects the **severity** or lethality of a disease among those affected, not the risk of developing the disease in the first place. - CFR is a measure of disease outcome, not disease occurrence. *Communicability Rate* - There is no standard epidemiological term exactly defined as "communicability rate"; however, related concepts include the **basic reproduction number (R₀)** and **secondary attack rate**. - These concepts describe the **spread or transmissibility of an infectious disease**, not the risk of contracting a disease from a general population perspective. - This measures transmission dynamics rather than individual risk.

Q: Which of the following constitutes "Secondary Prevention"?

Screening Tests. ***Screening Tests (Correct)*** - **Screening tests** constitute the core of **secondary prevention**, designed to detect disease in its **early, asymptomatic stages** before clinical symptoms appear. - By identifying disease early, screening enables **prompt intervention** to prevent progression, reduce morbidity, and improve prognosis. - Examples include mammography for breast cancer, PAP smear for cervical cancer, and blood pressure screening for hypertension. *Health Education Programme* - Health education programmes are examples of **primary prevention**, which aims to **prevent disease occurrence** by promoting healthy behaviors and reducing risk factors. - These interventions target healthy individuals to maintain health and prevent disease onset, not to detect existing disease. *Using Limb Callipers* - **Limb callipers** are used for anthropometric measurements or as assistive devices for mobility in patients with disabilities. - As a measurement tool, it's used for **assessment and monitoring**, not for disease prevention. - As an assistive device, it falls under **tertiary prevention** (rehabilitation), helping patients manage existing disability. *Wearing Safety Helmets* - Wearing safety helmets is a classic example of **primary prevention**, as it aims to **prevent injuries** (head trauma) from occurring in the first place. - It is a protective measure implemented before any health event occurs, not for early disease detection.

Q: "Sampling error" occurs due to the variation in results

between one sample and another. ***between one sample and another*** - **Sampling error** arises because a sample is not a perfect representation of the entire population from which it is drawn. - This error quantifies the natural **variability** that occurs when different subgroups (samples) are selected from the same population. *due to the use of many instruments in the study* - This scenario describes **inter-instrument variability** or **measurement error**, which is related to the precision and calibration of different tools. - While it can introduce error, it is distinct from sampling error, which arises from the representativeness of the chosen study subjects. *due to the multiple readings taken on the same instrument* - Multiple readings on the same instrument assess **intra-instrument variability** or **repeatability**, indicating how consistent a single instrument is over time. - This relates to the precision of the measurement device, not the representativeness of the sample itself. *between the observations of two individuals* - Differences in observations between two individuals indicate **inter-rater variability** or **observer bias**. - This type of error is related to subjective interpretation or measurement technique by different observers, rather than the intrinsic variability between selected samples.

Q: Match List-I with List-II and select the correct answer using the code given below the Lists:

A→1 B→3 C→2 D→4. ***A→1 B→3 C→2 D→4*** - This option correctly matches the occupational exposures with their characteristic health effects based on the lists provided. - **Lead poisoning** classically causes **wrist drop** due to radial nerve palsy, a hallmark neurological manifestation. - **Coal tar** exposure is associated with **skin cancer** (especially scrotal cancer in historical chimney sweeps) and **lung cancer** in occupational settings. - **Aniline dye** (particularly β-naphthylamine) is a well-established cause of **bladder cancer** in dye industry workers. - **Benzol (Benzene)** is notorious for causing **hematological disorders** including aplastic anemia, pancytopenia, and leukemia. *A→3 B→2 C→1 D→4* - This option incorrectly associates the exposures with their health effects. - The matching does not align with established occupational health associations. *A→3 B→1 C→4 D→2* - This option incorrectly associates the exposures with their health effects. - The matching does not align with established occupational health associations. *A→4 B→2 C→3 D→1* - This option incorrectly associates the exposures with their health effects. - Although lead can cause anemia, its most characteristic neurological effect is **wrist drop**, which is a diagnostic hallmark. Benzol (benzene) is primarily associated with hematological disorders, not neurological manifestations like wrist drop.

Q: Which one of the following indicators includes the value of a person's height squared in its formula?

Quetelet's index. ***Quetelet's index*** - **Quetelet's index**, also known as **Body Mass Index (BMI)**, is calculated as **weight (kg) / height (m)²**, thus directly incorporating height squared. - It is widely used to classify individuals as underweight, normal weight, overweight, or obese. - BMI is the most commonly used anthropometric indicator in clinical and public health settings. *Waist-to-hip ratio* - This ratio is calculated by dividing **waist circumference** by **hip circumference**. - It is an indicator of abdominal adiposity and does not use height in its formula. *Ponderal index* - The **Ponderal index** is calculated as **weight (kg) / height (m)³**, which uses height cubed, not squared. - It is often used to assess proportionality in infants and children. - While it includes height, the power is different from Quetelet's index. *Waist circumference* - **Waist circumference** is a direct measurement of the circumference of the abdomen. - It is an indicator of visceral fat and does not include height in its measurement or interpretation.

Q: Which of the following is covered under spiritual dimension of health?

Meaning and purpose of life. ***Meaning and purpose of life*** - The spiritual dimension of health encompasses an individual's search for **meaning, purpose, and value** in life. - It involves one's **beliefs, values, ethics**, and connection to something greater than oneself, which can provide a sense of peace and fulfillment. *Harmony within individual* - This concept aligns more closely with the **mental or psychological dimension** of health, focusing on inner peace and a balanced mind. - It relates to having a **stable emotional state** and a good self-concept. *Balance of rationality and emotionality* - This aspect primarily falls under the **mental or emotional dimension** of health. - It reflects an individual's ability to manage their emotions effectively and make rational decisions, contributing to overall **psychological well-being**. *Quality of interpersonal ties* - This pertains to the **social dimension** of health, which involves an individual's relationships and interactions with others. - Strong and positive social connections are crucial for social well-being, but they are not the primary focus of the **spiritual dimension**.

Q: Which of the following insecticides is a natural contact poison?

Rotenone. ***Rotenone*** - **Rotenone** is a naturally occurring plant-derived insecticide, traditionally used as a **contact poison** and **stomach poison**. - It is effective against a broad spectrum of insects and works by inhibiting **electron transport** in the mitochondria, disrupting cellular respiration. *Propoxur* - **Propoxur** is a **synthetic carbamate insecticide**, not a natural one. - It acts primarily as a **cholinesterase inhibitor**, interfering with nervous system function. *Carbaryl* - **Carbaryl** is a **synthetic carbamate insecticide**, derived from carbamic acid, not a natural product. - Its mechanism of action involves **reversible inhibition of acetylcholinesterase**, leading to nerve overstimulation. *Lindane* - **Lindane** is an **organochlorine insecticide**, which is a synthetic compound, not naturally occurring. - It acts as a **neurotoxin**, primarily by interfering with **GABA-gated chloride channels** in the insect's nervous system.

Q: In measles, when do the Koplik's spots appear?

1-2 days before the rashes appear. ***1-2 days before the rashes appear*** - **Koplik's spots** are considered an **enanthem**, a pathognomonic sign of **measles**. - These small, white spots with a bluish-white center on an erythematous base on the buccal mucosa typically appear 1-2 days before the generalized maculopapular rash. *On the day that rashes appear* - The generalized **maculopapular rash** of measles typically appears a few days *after* Koplik's spots. - While the rash is a hallmark of measles, it is preceded by the oral lesions. *On the day that fever occurs* - **Fever** is usually one of the initial symptoms of measles, often appearing several days before Koplik's spots. - The fever is part of the **prodromal phase**, which includes cough, coryza, and conjunctivitis. *1-2 days before the fever occurs* - Measles symptoms, including fever, are usually the first indicators of infection, making it unlikely for a specific sign like Koplik's spots to appear before the fever itself. - The incubation period precedes any symptoms, including fever.

Question 1

The "risk of a disease" is measured by the

Accepted Answer

Incidence Rate

Answer

Prevalence Rate

Answer

Case Fatality Rate

Answer

Communicability Rate

Question 2

The "Relative Risk" of 0.25 indicates

Accepted Answer

75% reduction in the incidence rate in the exposed individuals compared with the unexposed

Answer

2.5 times higher risk in the exposed individuals compared with the unexposed

Answer

25% increase in the incidence rate in the exposed individuals compared with the unexposed

Answer

75% risk increase in the exposed individuals compared with the unexposed

Question 3

Which of the following constitutes "Secondary Prevention"?

Accepted Answer

Screening Tests

Answer

Health Education Programme

Answer

Using Limb Callipers

Answer

Wearing Safety Helmets

Question 4

The installation and usage of sanitary latrines by general public constitutes which level of prevention?

Accepted Answer

Specific protection

Answer

Disability limitation and rehabilitation

Answer

Early diagnosis and treatment

Answer

Health promotion

Question 5

"Sampling error" occurs due to the variation in results

Accepted Answer

between one sample and another

Answer

due to the use of many instruments in the study

Answer

due to the multiple readings taken on the same instrument

Answer

between the observations of two individuals

Question 6

Match List-I with List-II and select the correct answer using the code given below the Lists:

Accepted Answer

A→1  B→3  C→2  D→4

Answer

A→3  B→2  C→1  D→4

Answer

A→3  B→1  C→4  D→2

Answer

A→4  B→2  C→3  D→1

Question 7

Which one of the following indicators includes the value of a person's height squared in its formula?

Accepted Answer

Quetelet's index

Answer

Waist-to-hip ratio

Answer

Ponderal index

Answer

Waist circumference

Question 8

Which of the following is covered under spiritual dimension of health?

Accepted Answer

Meaning and purpose of life

Answer

Harmony within individual

Answer

Balance of rationality and emotionality

Answer

Quality of interpersonal ties

Question 9

Which of the following insecticides is a natural contact poison?

Accepted Answer

Rotenone

Answer

Propoxur

Answer

Carbaryl

Answer

Lindane

Question 10

In measles, when do the Koplik's spots appear?

Accepted Answer

1-2 days before the rashes appear

Answer

On the day that rashes appear

Answer

On the day that fever occurs

Answer

1-2 days before the fever occurs

UPSC-CMS 2023

Community Medicine

Forensic Medicine

Pediatrics