A nursing preceptor is reviewing life expectancy in the twentieth century with a new nurse. The nurse should recognize that which of the following was most responsible for the dramatic increase in life expectancy during the twentieth century.

Choice A: Reviewing communicable disease statistics. This is incorrect because this is an example of descriptive epidemiology, not analytic epidemiology. Descriptive epidemiology describes the distribution and patterns of health events in populations, such as the frequency, location, and time of occurrence.

Choice B: Tracking locations where family violence is increasing. This is incorrect because this is also an example of descriptive epidemiology, not analytic epidemiology. Descriptive epidemiology tracks the trends and variations of health problems in different groups or areas.

Choice C: Describing population characteristics for healthy older citizens. This is incorrect because this is another example of descriptive epidemiology, not analytic epidemiology. Descriptive epidemiology provides information about the demographic and social factors that influence health outcomes.

Choice D: Identifying factors contributing to childhood obesity. This is correct because this is an example of analytic epidemiology. Analytic epidemiology investigates the causes and associations of health events in populations, such as the risk factors, exposures, or interventions that affect health outcomes. Analytic epidemiology often uses comparison groups to test hypotheses and draw conclusions.

Choice A reason: The inability to take risks is not a quality of an effective nurse leader, as it may limit the leader's potential for growth, innovation, and improvement. Effective nurse leaders are willing to take calculated risks that are based on evidence, experience, and intuition. They are also able to learn from their mistakes and failures and use them as opportunities for development.

Choice B reason: Never consider being a follower is not a quality of an effective nurse leader, as it may indicate a lack of flexibility, collaboration, and respect for others. Effective nurse leaders are able to adapt to different situations and roles, depending on the needs and goals of the team. They are also able to recognize the strengths and contributions of their followers and empower them to achieve their full potential.

Choice C reason: The ability to set priorities is a quality of an effective nurse leader, as it helps the leader to focus on the most important and urgent tasks and goals. Effective nurse leaders are able to identify the needs and expectations of their clients, staff, and organization, and allocate their time, resources, and energy accordingly. They are also able to delegate tasks appropriately and efficiently.

Choice D reason: Integrity is a quality of an effective nurse leader, as it reflects the leader's honesty, trustworthiness, and ethical standards. Effective nurse leaders are able to act in accordance with their values and principles, and uphold the professional code of conduct. They are also able to communicate openly and transparently, and accept responsibility and accountability for their actions and decisions.

Choice E reason: Critical care certification is not a quality of an effective nurse leader, as it is not a requirement or a guarantee for leadership success. Critical care certification is a credential that demonstrates the nurse's knowledge and competence in providing care to critically ill patients. While it may enhance the nurse's clinical skills and confidence, it does not necessarily reflect the nurse's leadership skills or abilities. Effective nurse leaders can come from various backgrounds and specialties, as long as they have the necessary qualities and attributes that enable them to lead others effectively.