A medical unit had 12 inpatient falls in one quarter, with 4,800 patient days and 1,200 admissions. What is the fall rate per 1,000 patient days?
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Answer: A
- Rate = falls ÷ patient days × 1,000.
- Rate = 12 ÷ 4,800 × 1,000.
- 12 ÷ 4,800 = 0.0025; 0.0025 × 1,000 = 2.5 falls per 1,000 patient days.
2.5: Correct. 12 falls ÷ 4,800 patient days × 1,000 = 2.5 falls per 1,000 patient days.
10: Uses admissions (12 ÷ 1,200 × 1,000) as the denominator instead of patient days.
25: Multiplies by 10,000 instead of 1,000.
400: Inverts the ratio: 4,800 ÷ 12 gives patient days per fall, not falls per 1,000 patient days.
Event rate per 1,000 patient days = events ÷ patient days × 1,000; it allows comparison across units of different size.