Sure, let’s break down the steps to find out which percentage of the elderly population is affected by senile dementia.
1. Identify the Range of Percentages:
We have multiple choice options:
- Almost 100%
- About 50%
- Less than 25%
- Around 75%
2. Understand What 'Elderly Population Affected by Senile Dementia' Implies:
Senile dementia affects a significant portion of the elderly population but not the majority or entirety. Typically, the proportion is much less than half.
3. Analyzing Each Option:
- "Almost 100%" implies that nearly all elderly people are affected. This is highly unlikely because not every elderly person suffers from senile dementia.
- "About 50%" suggests that half of the elderly population is affected. This is also quite high and not realistic for senile dementia statistics.
- "Less than 25%" fits more realistically with epidemiological data and common medical knowledge, suggesting that it affects a smaller, yet significant, portion of the population.
- "Around 75%" suggests a majority but less than all elderly individuals are affected. This is still quite high and not consistent with known data about senile dementia prevalence.
4. Conclusion:
Based on realistic and medically accepted data, the percentage of the elderly population affected by senile dementia is most consistent with the option that suggests a lower percentage. Therefore, the most accurate answer among the provided options is:
- Less than 25%
Thus, the percentage of the elderly population affected by senile dementia is "Less than 25%."
