UPSC-CMS 2017 - Community Medicine Practice Questions

Q: In a normal distribution, Mean ± 2 S.D. contains

95.4 % values. ***95.4 % values*** - According to the **empirical rule** (or 68-95-99.7 rule) for normal distributions, approximately **95.4%** of data falls within two standard deviations of the mean. - This interval covers from (Mean - 2 S.D.) to (Mean + 2 S.D.) and represents the likelihood of a value falling in this range. *68.3 % values* - This percentage corresponds to the data contained within **Mean ± 1 S.D.** in a normal distribution, not Mean ± 2 S.D. - It signifies that roughly two-thirds of all observations lie within one standard deviation from the mean in a bell-shaped curve. *91.2 % values* - This value is not a standard percentage associated with common multiples of standard deviations (1, 2, or 3) from the mean in a normal distribution. - It does not correspond to any universally recognized interval like ±1 S.D., ±2 S.D., or ±3 S.D. *99.7 % values* - This percentage represents the data contained within **Mean ± 3 S.D.** in a normal distribution. - It indicates that almost all (99.7%) of the data points are expected to fall within three standard deviations from the mean.

Q: Infant Mortality Rate is expressed per:

1000 live births. ***1000 live births*** - The **Infant Mortality Rate (IMR)** specifically measures the number of deaths of infants **under one year of age** per **1,000 live births** in a given population. - This definition is crucial for accurately assessing and comparing infant health outcomes across different regions and over time. *1000 pregnancies* - This option would include pregnancy losses that are not considered live births, such as **stillbirths** and miscarriages, which are distinct statistical measures. - The IMR specifically focuses on infants who were born alive and subsequently died within their first year of life. *100,000 live births* - While some rates might be expressed per 100,000 (e.g., maternal mortality ratio), **infant mortality rate** is universally standardized to a base of **1,000 live births**. - Using 100,000 live births would result in a disproportionately small and less intuitive number for IMR comparisons. *1000 under five children* - This definition refers to the **Under-5 Mortality Rate (U5MR)**, which includes deaths of children from birth up to their fifth birthday. - The IMR is a narrower measure, specifically focusing on infants who die **before their first birthday**.

Q: Which of the following tests is NOT used for checking quality of pasteurisation of milk?

Orthotoluidine test. ### ***Orthotoludine test*** * The **Orthotoluidine test** is used to detect residual **chlorine** in drinking water. * It is not employed to assess the quality of pasteurization in milk, which focuses on enzyme inactivation and microbial reduction. ### *Phosphatase test* * The **phosphatase test** is the most widely accepted and reliable method for checking the adequacy of **pasteurization** in milk. * It works by detecting the activity of **alkaline phosphatase**, an enzyme naturally present in raw milk that is destroyed at pasteurization temperatures. ### *Coliform count* * The **coliform count** is an indicator of **post-pasteurization contamination** or inadequate sanitation. * While not a direct measure of the pasteurization process itself, a high coliform count suggests a failure in hygiene after heating, indicating poor overall quality control. ### *Standard Plate count* * The **Standard Plate Count (SPC)**, also known as the **aerobic plate count**, measures the total number of viable microorganisms in milk. * A reduction in SPC after pasteurization indicates the effectiveness of the heat treatment in killing bacteria, making it an indirect measure of pasteurization efficiency and overall microbial quality.

Q: Which of the following are the components of epidemiological triad?

Agent, host and environmental factors. ***Agent, host and environmental factors*** - The **epidemiological triad** is a traditional model that explains disease causation by focusing on the interaction between an infectious **agent**, a susceptible **host**, and the **environment** that brings them together. - Understanding these three components helps to analyze and prevent the spread of diseases. *Sensitivity, specificity and predictive value* - These terms relate to the **performance and accuracy of diagnostic tests**, assessing how well a test identifies true positives and true negatives. - They are measures used in the evaluation of screening programs and diagnostic procedures, not directly in the causation model. *Prevalence, incidence and attack rate* - These are **measures of disease occurrence** or frequency within a population, used to quantify the burden of disease. - While essential for understanding disease patterns, they describe the *results* of the disease process rather than the *factors* causing it. *Time, place and person distribution* - These refer to the **descriptive epidemiology** aspects of disease, outlining **who** is affected, **where** they are, and **when** the disease occurs. - These elements characterize disease patterns but are not the fundamental components responsible for disease causation in the epidemiological triad model.

Q: By applying the principles of ergonomics which of the following can be improved? 1. Designing of equipment and tools 2. Human efficiency 3. Layout of place of work 4. Reduction in industrial accidents Select the correct answer using the code given below:

1, 2, 3 and 4. ***1, 2, 3 and 4*** - **Ergonomics** is the science of designing and arranging workplaces, products, and systems so that they fit the people who use them, thereby improving **human efficiency**, safety, and comfort. - By optimizing the interaction between humans and their work environment, ergonomics directly impacts the **design of equipment and tools**, the **layout of the workplace**, and significantly contributes to the **reduction of industrial accidents**. *1, 3 and 4 only* - This option incorrectly excludes **human efficiency** as an outcome of applying ergonomic principles. - A primary goal of ergonomics is to enhance human performance and well-being, which directly translates to improved efficiency. *2, 3 and 4 only* - This option incorrectly excludes the **designing of equipment and tools** from the benefits of ergonomics. - Ergonomics is fundamentally applied in the design phase to ensure tools and equipment are user-friendly, safe, and effective. *1, 2 and 3 only* - This option incorrectly excludes the **reduction in industrial accidents** as a benefit of ergonomics. - By designing safer interfaces and work environments, ergonomics plays a crucial role in preventing workplace injuries and accidents.

Q: The risk of disease is measured by

Incidence Rate. ***Incidence Rate*** - **Incidence rate** measures the frequency of developing a new disease in a population over a specific period, thus directly reflecting the **risk** of disease occurrence. - It considers the number of **new cases** divided by the population at risk and provides insight into the dynamic process of becoming ill. *Prevalence Rate* - **Prevalence rate** measures the total number of existing cases of a disease in a population at a specific point in time or over a period. - It reflects the **burden** of disease but not the risk, as it includes both new and old cases. *Fatality Rate* - **Fatality rate** or **case fatality rate (CFR)** measures the proportion of individuals diagnosed with a disease who die from that disease. - It reflects the **severity** or prognosis of a disease, not the risk of acquiring it. *Attrition Rate* - **Attrition rate** refers to the rate of participants dropping out of a study or employees leaving an organization. - It is an indicator of **retention** or loss in a population, not the risk of disease.

Q: Which is/are the correct statements regarding the cut off points for the diagnosis of anaemia? 1. Haemoglobin for adult males is 13 g/dl 2. Haemoglobin for adult non-pregnant female is 12 g/dl 3. Haemoglobin for adult pregnant female is 11 g/dl 4. Haemoglobin for children six months to six years of age is 11 g/dl Select the correct answer using the code given below:

1, 2, 3 and 4. ***1, 2, 3 and 4*** - All four statements correctly represent the **World Health Organization (WHO) hemoglobin cut-off points** for diagnosing **anemia** across different population groups. - These standardized values are used globally for **screening, diagnosis, and public health surveillance** of anemia. - **Adult males: <13 g/dL**, **non-pregnant females: <12 g/dL**, **pregnant females: <11 g/dL**, and **children (6 months-6 years): <11 g/dL** are the accepted thresholds. *1 and 3 only* - This option incorrectly excludes statements 2 and 4, which are also valid WHO criteria. - Missing the cut-offs for non-pregnant women (12 g/dL) and young children (11 g/dL) would result in incomplete anemia assessment. *1 only* - This option is far too restrictive, acknowledging only the hemoglobin threshold for adult males. - It ignores the correct and distinct criteria for **women (pregnant and non-pregnant)** and **children**, which are essential for comprehensive anemia diagnosis. *2 and 4 only* - This option incorrectly omits statements 1 and 3, which are equally valid. - Excluding the hemoglobin cut-offs for adult males (13 g/dL) and pregnant women (11 g/dL) provides an incomplete picture of WHO anemia criteria.

Q: Health functionary at PHC level is:

Health Assistant (Female). ***Health Assistant (Female)*** - The **Health Assistant (Female)**, also known as the Block Extension Educator or Lady Health Visitor, supervises the work of multiple **Health Workers (Female)** and is primarily stationed at the **Primary Health Centre (PHC)** level in India. - Their role involves providing administrative and technical support, training, and supervision to grassroots health functionaries, making them a key health functionary at the PHC level. *Anganwadi Worker* - An **Anganwadi Worker** operates at the village level, typically managing an Anganwadi centre, which is primarily focused on children's health, nutrition, and early childhood education. - While they are important community health volunteers, they are not considered a primary health functionary at the PHC level, but rather work under the Integrated Child Development Services (ICDS) scheme. *Health Worker (Female)* - A **Health Worker (Female)**, also known as an Auxiliary Nurse Midwife (ANM), is a grassroots-level functionary, usually based at the **Sub-Centre (SC)**, which is below the PHC level. - They provide direct primary healthcare services to a defined population within a cluster of villages, and are supervised by the Health Assistant (Female) at the PHC. *ASHA* - An **ASHA (Accredited Social Health Activist)** is a community health volunteer who acts as a crucial link between the community and the public health system. - They operate at the village level, working primarily as a mobilizer, health educator, and facilitator for accessing health services, rather than a health functionary stationed at the PHC.

Q: Due to a measles outbreak in a community, a medical officer decided to immunize a child aged seven months with measles vaccine. When should the next measles vaccine be administered?

When the child completes nine months of age. ***When the child completes nine months of age*** - A measles vaccine given at **seven months during an outbreak** is considered a **zero-dose** or **early dose** and does NOT replace the routine immunization schedule. - According to the **Indian National Immunization Schedule**, the routine first dose of measles vaccine (MR vaccine) is given at **9 months of age**, regardless of whether an earlier outbreak dose was administered. - Vaccines given before 9 months have **reduced efficacy** due to interference from maternal antibodies, making the 9-month dose essential for adequate seroconversion. - After the 9-month dose, a second dose is given at **16-24 months** as per routine schedule. *When the child completes fifteen months of age* - While 15-18 months is appropriate timing for the **second dose** of measles vaccine in the routine schedule, it is not the immediate next dose after a 7-month outbreak vaccination. - The child still requires the **routine 9-month dose first**, followed by the second dose at 16-24 months. - Skipping the 9-month dose and going directly to 15 months would leave a prolonged gap without adequate protection. *Not required* - This is **incorrect** because early doses given before 9 months are considered zero-doses and do not provide reliable long-term immunity. - The routine schedule **must still be followed** to ensure proper immunization, starting with the 9-month dose. *After four weeks* - A four-week interval after the 7-month dose is **too short** and not recommended in immunization guidelines. - There is **no indication** for such an early repeat dose; the child should wait until the routine 9-month schedule for the next dose.

Q: Which of the following is/are the methods of assessment of nutritional status? 1. Clinical examination 2. Anthropometry 3. Biochemical evaluation 4. Orthotolidine test Select the correct answer using the code given below:

1, 2 and 3 only. ***1, 2 and 3 only*** - **Clinical examination** involves assessing physical signs of nutrient deficiencies or excesses. This includes inspecting for signs like **pallor** (iron deficiency), **cheilosis** (riboflavin deficiency), or **edema** (protein-energy malnutrition). - **Anthropometry** uses body measurements like **height, weight, body mass index (BMI), and skinfold thickness** to assess body composition and identify abnormalities such as **underweight, overweight, obesity, and stunting**. - **Biochemical evaluation** involves laboratory tests on blood or urine samples to measure nutrient levels (e.g., **serum albumin, ferritin, vitamin D**) or metabolic markers indicative of nutritional status. *1 only* - While **clinical examination** is a crucial component of nutritional assessment, it alone does not provide a comprehensive picture. - It may miss subclinical deficiencies or excesses that require further investigation through other methods. *1 and 3 only* - This option correctly identifies **clinical examination** and **biochemical evaluation** as assessment methods, but it incorrectly excludes **anthropometry**. - **Anthropometry** is fundamental for assessing growth, body composition, and identifying specific nutritional problems like **underweight, obesity, and stunting**. *1, 2, 3 and 4* - This option includes methods 1, 2, and 3, which are indeed correct methods for nutritional assessment. - However, the **Orthotolidine test** (method 4) is used to detect **blood in urine or feces**, specifically for investigating conditions like **gastrointestinal bleeding**, and is not a direct method for assessing general nutritional status.

Question 1

In a normal distribution, Mean ± 2 S.D. contains

Accepted Answer

95.4 % values

Answer

68.3 % values

Answer

91.2 % values

Answer

99.7 % values

Question 2

Infant Mortality Rate is expressed per:

Accepted Answer

1000 live births

Answer

1000 pregnancies

Answer

100,000 live births

Answer

1000 under five children

Question 3

Which of the following tests is NOT used for checking quality of pasteurisation of milk?

Accepted Answer

Orthotoluidine test

Answer

Phosphatase test

Answer

Coliform count

Answer

Standard Plate count

Question 4

Which of the following are the components of epidemiological triad?

Accepted Answer

Agent, host and environmental factors

Answer

Sensitivity, specificity and predictive value

Answer

Prevalence, incidence and attack rate

Answer

Time, place and person distribution

Question 5

By applying the principles of ergonomics which of the following can be improved?

1. Designing of equipment and tools
2. Human efficiency
3. Layout of place of work
4. Reduction in industrial accidents

Select the correct answer using the code given below:

Accepted Answer

1, 2, 3 and 4

Answer

1, 3 and 4 only

Answer

2, 3 and 4 only

Answer

1, 2 and 3 only

Question 6

The risk of disease is measured by

Accepted Answer

Incidence Rate

Answer

Prevalence Rate

Answer

Fatality Rate

Answer

Attrition Rate

Question 7

Which is/are the correct statements regarding the cut off points for the diagnosis of anaemia?

1. Haemoglobin for adult males is 13 g/dl

2. Haemoglobin for adult non-pregnant female is 12 g/dl

3. Haemoglobin for adult pregnant female is 11 g/dl

4. Haemoglobin for children six months to six years of age is 11 g/dl
Select the correct answer using the code given below:

Accepted Answer

1, 2, 3 and 4

Answer

1 and 3 only

Answer

1 only

Answer

2 and 4 only

Question 8

Health functionary at PHC level is:

Accepted Answer

Health Assistant (Female)

Answer

Anganwadi Worker

Answer

Health Worker (Female)

Answer

ASHA

Question 9

Due to a measles outbreak in a community, a medical officer decided to immunize a child aged seven months with measles vaccine. When should the next measles vaccine be administered?

Accepted Answer

When the child completes nine months of age

Answer

Not required

Answer

When the child completes fifteen months of age

Answer

After four weeks

Question 10

Which of the following is/are the methods of assessment of nutritional status?

1. Clinical examination
2. Anthropometry
3. Biochemical evaluation
4. Orthotolidine test

Select the correct answer using the code given below:

Accepted Answer

1, 2 and 3 only

Answer

1 only

Answer

1 and 3 only

Answer

1, 2, 3 and 4

UPSC-CMS 2017 — Community Medicine