1. What is Average Blood Pressure Calculator Excluding First Day?

Definition: This calculator computes the average of home blood pressure readings while excluding measurements from the first day.

Purpose: It helps eliminate potential "white coat effect" or initial measurement anxiety that might affect first-day readings.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Readings — Systolic and diastolic blood pressure measurements in mmHg
• N — Total number of days with readings
• N-1 — Days used in calculation (excluding first day)

Explanation: The calculator sums all valid readings from day 2 onward and divides by the number of days minus one.

3. Importance of Excluding First Day

Details: Many patients show elevated blood pressure on their first day of home monitoring due to:
- Measurement anxiety
- Unfamiliarity with the device
- Changes in routine
Excluding these readings provides a more accurate baseline.

4. Using the Calculator

Tips: Enter your readings as systolic/diastolic pairs (e.g., "120,80") with one day's readings per line. The first line will be automatically excluded from calculations.

5. Frequently Asked Questions (FAQ)

Q1: Why exclude the first day's readings?
A: First-day readings are often higher due to the "white coat effect" at home, potentially skewing your true average.

Q2: How many days should I monitor?
A: For accurate results, monitor for at least 3-4 days (excluding the first day).

Q3: When should I take my readings?
A: Take readings at consistent times (morning and evening) after resting for 5 minutes.

Q4: What's considered a normal home blood pressure?
A: Typically <135/85 mmHg when measured at home (lower than clinical thresholds).

Q5: Should I discard any other readings?
A: Yes, discard readings where you felt anxious, were interrupted, or had measurement errors.