1. What is Corrected Age?

Corrected age is the age a premature baby would be if they had been born at full term (40 weeks gestation). It accounts for prematurity when assessing growth and development.

2. How Does the Calculator Work?

The calculator uses the corrected age formula:

Where:

• Chronological Age — Actual age since birth (in weeks)
• Prematurity Weeks — Weeks born before 40 weeks gestation

Explanation: The equation adjusts the baby's age by subtracting the weeks of prematurity from their chronological age.

3. Importance of Corrected Age

Details: Corrected age is essential for properly assessing premature infants' growth and developmental milestones until about 2-3 years of age.

4. Using the Calculator

Tips: Enter chronological age in weeks (since birth) and prematurity weeks (40 - gestational age at birth). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Until what age should corrected age be used?
A: Typically until 2-3 years old, though this may vary based on degree of prematurity and individual development.

Q2: How do I calculate prematurity weeks?
A: Subtract gestational age at birth from 40 weeks (full term). For example, a baby born at 32 weeks would have 8 prematurity weeks.

Q3: Should corrected age be used for vaccinations?
A: No, vaccinations should always be given based on chronological age, not corrected age.

Q4: Does corrected age apply to all premature babies?
A: It's most important for babies born before 37 weeks, especially those born very premature (<32 weeks).

Q5: How does corrected age affect developmental milestones?
A: Premature babies often reach milestones closer to their corrected age rather than their chronological age.