A public health nurse is participating in a research study to determine how virulent a new virus is. Which of the following mortality measures should the nurse use to calculate this data?
Cause-specific mortality rate
Age-specific mortality rate*
Proportionate mortality
Case fatality
The Correct Answer is D
Choice A Reason:
The cause-specific mortality rate measures the number of deaths attributed to a specific cause within a population during a given time period. While this measure is useful for understanding the impact of a particular disease on a population, it does not directly indicate the virulence of a virus. Virulence refers to the severity or harmfulness of a disease, which is better captured by the case fatality rate.
Choice B Reason:
The age-specific mortality rate calculates the number of deaths within specific age groups in a population. This measure helps identify age-related mortality trends but does not provide information about the virulence of a virus. Age-specific mortality rates are more useful for understanding the impact of diseases across different age demographics rather than assessing the severity of a new virus.
Choice C Reason:
Proportionate mortality refers to the proportion of deaths in a population attributable to a specific cause relative to all deaths. This measure helps in understanding the relative importance of different causes of death but does not directly measure the virulence of a virus. Proportionate mortality is more about the distribution of causes of death rather than the severity of a particular disease.
Choice D Reason:
Case fatality rate (CFR) is the most appropriate measure for determining the virulence of a new virus. CFR is calculated by dividing the number of deaths caused by the disease by the number of diagnosed cases of the disease, then multiplying by 100 to get a percentage. This measure directly indicates the lethality of the virus by showing the proportion of diagnosed cases that result in death. It is a critical indicator for assessing the severity and potential impact of a new infectious disease.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A Reason:
Data analysis involves examining and interpreting the collected data to identify patterns, trends, and relationships. This stage includes statistical analysis, creating comparative tables, and computing measures of association such as risk ratios or odds ratios. While crucial, this stage comes after the conceptualization and design phase.
Choice B Reason:
Conduct/implementation refers to the actual execution of the study, including data collection and ensuring that the study follows the designed protocol. This stage involves gathering data from participants, ensuring compliance with ethical standards, and managing the logistics of the study. It follows the conceptualization and design phase.
Choice C Reason:
Conceptualization/design is the initial stage of an analytic study where the research question is defined, hypotheses are generated, and the study design is developed. This stage involves planning the methodology, selecting the study population, and determining the data collection methods. The nurse's involvement in this stage indicates participation in the foundational planning and structuring of the study.
Choice D Reason:
Interpretation of findings involves analyzing the results of the data analysis to draw conclusions and make recommendations based on the study's outcomes. This stage includes discussing the implications of the findings, identifying limitations, and suggesting areas for further research. It is one of the final stages of the study process.
Correct Answer is D
Explanation
Choice A Reason:
The portal of entry refers to the site through which pathogens enter the body. While handwashing can indirectly affect the portal of entry by reducing the number of pathogens on the hands, it primarily targets the mode of transmission. The portal of entry includes areas such as the respiratory tract, gastrointestinal tract, and breaks in the skin.
Choice B Reason:
The susceptible host is an individual who is at risk of infection due to factors such as age, underlying health conditions, or weakened immune systems. Handwashing does not directly alter the susceptibility of the host but rather reduces the likelihood of the host coming into contact with pathogens.
Choice C Reason:
The portal of exit is the site from which pathogens leave the host to infect another individual. Common portals of exit include the respiratory tract, gastrointestinal tract, and open wounds. Handwashing does not directly impact the portal of exit but helps prevent the spread of pathogens from one person to another.
Choice D Reason:
Mode of transmission refers to the way pathogens are transferred from one host to another. Handwashing is a critical intervention that targets this link in the chain of transmission by removing pathogens from the hands, thereby preventing their spread through direct contact or contact with contaminated surfaces. This is why proper handwashing technique is emphasized in infection control practices.
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