Crude Birth Rate (CBR) is defined as the number of live births occurring in a year per 1,000 population. Which denominator is used for its calculation?
- A Total population at the start of the year
- B Mid-year population ✓
- C Total population at the end of the year
- D Total number of women aged 15-49 years
Correct answer: B. Mid-year population
Explanation
CBR uses the mid-year population as the denominator because it best represents the average population at risk during the year. Using start or end population would be inaccurate due to births, deaths, and migration throughout the year. Women aged 15-49 years is the denominator for General Fertility Rate, not CBR.
Reference: Park's Textbook of Preventive and Social Medicine, 26th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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