This article covers ASQ®-3.
Table of Contents
How are Age Intervals Selected?
Children are matched by age; for a child under 24 months born 3 or more weeks early, by age adjusted for prematurity (add the weeks premature to the date of birth).
This ensures that questions are appropriate and relevant.
Age Intervals
ASQ questionnaires are designed for children between 1 month and 66 months (5½ years old).
To determine a child’s age interval, please use the ASQ Age Calculator linked below:
Considerations:
Adjusted Age (if applicable)
If the child is born 3 or more weeks prematurely, then the child's age should be adjusted for prematurity until the child's second birthday (24 months) when selecting the questionnaire.
Age Windows:
- 2 months: 1 month 0 days through 2 months 30 days
- 4 months: 3 months 0 days through 4 months 30 days
- 6 months: 5 months 0 days through 6 months 30 days
- 8 months: 7 months 0 days through 8 months 30 days
- 9 or 10 months: 9 months 0 days through 9 months 30 days
- 10 months: 10 months 0 days through 10 months 30 days
- 12 months: 11 months 0 days through 12 months 30 days
- 14 months: 13 months 0 days through 14 months 30 days
- 16 months: 15 months 0 days through 16 months 30 days
- 18 months: 17 months 0 days through 18 months 30 days
- 20 months: 19 months 0 days through 20 months 30 days
- 22 months: 21 months 0 days through 22 months 30 days
- 24 months: 23 months 0 days through 25 months 15 days
- 27 months: 25 months 16 days through 28 months 15 days
- 30 months: 28 months 16 days through 31 months 15 days
- 33 months: 31 months 16 days through 34 months 15 days
- 36 months: 34 months 16 days through 38 months 30 days
- 42 months: 39 months 0 days through 44 months 30 days
- 48 months: 45 months 0 days through 50 months 30 days
- 54 months: 51 months 0 days through 56 months 30 days
- 60 months: 57 months 0 days through 66 months 0 days
References
Ages & Stages Questionnaires® and ASQ® are registered trademarks of Paul H. Brookes Publishing Co., Inc.
The ASQ-3 logo is a trademark of Paul H. Brookes Publishing Co., Inc.
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