1. What is the CDI Index?

The CDI (Composite Deprivation Index) measures the relative consumption of a particular resource or service by a population group compared to their proportion in the total population. A value of 100 indicates proportional consumption.

2. How Does the Calculator Work?

The calculator uses the CDI equation:

Where:

• \( Consumption \% \) — Percentage of total consumption by the group (decimal)
• \( Population \% \) — Percentage of total population represented by the group (decimal)

Interpretation:

• CDI = 100: Proportional consumption
• CDI > 100: Higher than proportional consumption
• CDI < 100: Lower than proportional consumption

3. Importance of CDI Calculation

Details: The CDI is useful for identifying disparities in resource allocation, service utilization, or consumption patterns among different population groups.

4. Using the Calculator

Tips: Enter consumption and population percentages as decimals (e.g., for 25%, enter 25). Both values must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What fields commonly use the CDI?
A: CDI is used in public health, economics, marketing, and social sciences to analyze consumption patterns.

Q2: What's considered a significant deviation from 100?
A: Typically, values below 80 or above 120 are considered significant deviations, but this depends on context.

Q3: Can CDI be used for multiple groups?
A: Yes, CDI can be calculated separately for each subgroup within a population.

Q4: What are limitations of the CDI?
A: CDI doesn't account for absolute quantities or quality differences, only relative proportions.

Q5: How often should CDI be calculated?
A: Frequency depends on the application, but regular monitoring helps track trends over time.