Blood Pressure Average Formula:
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Definition: This calculator computes the average of home blood pressure readings according to UK guidelines, excluding the first day's measurements.
Purpose: Helps individuals and healthcare professionals accurately assess blood pressure trends while following standard UK monitoring protocols.
The calculator:
Formula: \[ \text{Avg} = \frac{\sum (\text{Valid readings})}{\text{Number of valid readings}} \]
Details: UK guidelines recommend excluding the first day's readings as they may be artificially elevated due to the "white coat effect" or initial anxiety about self-monitoring.
Instructions:
Q1: Why exclude the first day's readings?
A: The first day often shows higher values due to initial anxiety about monitoring (alerting reaction).
Q2: How many readings should I provide?
A: UK guidelines recommend at least 4 days (8 readings) after excluding the first day.
Q3: What time should I take readings?
A: Take 2 readings daily - morning (before medication) and evening, following UK NICE guidelines.
Q4: How is this different from clinic measurements?
A: Home readings are typically lower and more reliable than clinic measurements for diagnosis.
Q5: What's considered a normal home BP average?
A: Generally less than 135/85 mmHg for home readings (equivalent to 140/90 in clinic).