The National Cancer Institute recently conducted a lung cancer screening program. This is an example of:

Question

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The question describes a lung cancer screening program implemented by the National Cancer Institute. To understand which type of prevention this represents, we need to recall the definitions of the four common levels of prevention.

Option 1: Quaternary prevention. This concept focuses on preventing overmedicalization and protecting patients from unnecessary or excessive interventions. It is not about screening asymptomatic populations for early disease, so this choice is not aligned with the scenario.

Option 2: Secondary prevention. This level of prevention is about early disease detection in individuals who do not yet have symptoms, usually through screening tests. The aim is to find a disease at an early, more treatable stage to reduce morbidity and mortality. A lung cancer screening program using imaging in at-risk populations fits this definition, as it seeks to identify cancer before symptoms arise.

Option 3: Tertiary prevention. This pertains to reducing complications and improving quality of life once a disease is established, such as rehabilitation after a stroke. It does not describe initiating a screening program for early detection, so it is not appropriate here.

Option 4: Primary prevention. This involves preventing the disease from occurring in the first place, such as vaccination or lifestyle changes to prevent cancer. A screening program does not prevent the initial development of cancer; it detects it after exposure risk has occurred, so this choice is incorrect.

In summary, the lung cancer screening program is best characterized as a secondary prevention activity because it aims to detect cancer early in individuals who are at risk but asymptomatic, thereby enabling earlier intervention and potential reduction in mortality. The other options describe different aims (avoiding harm from treatment, preventing disease, or reducing harm after disease onset) that do not match the described program.

The National Cancer Institute recently conducted a lung cancer screening program. This is an example of:单项选择题

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