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A statistical analysis of the factors that determine the age at which babies start walking
1Faculty of Home Economics, Ochanomizu University, Tokyo, Japan.
Insights
Early walking in babies is influenced by factors like walker use, being carried, and daycare enrollment. Birth weight and birth order also play significant roles in determining when infants begin to walk.
Area of Science:
- Developmental Pediatrics
- Child Psychology
- Biostatistics
Background:
- Understanding the developmental milestones of infants is crucial for parental guidance and early intervention.
- The age of first walking varies significantly among infants, prompting research into contributing factors.
Purpose of the Study:
- To identify key factors influencing the age at which infants begin walking.
- To differentiate between factors that promote early walking and those that do not.
Main Methods:
- Statistical analysis using contingency tables and chi-squared tests on parent-reported data from 395 children.
- Application of the "quantification method of the second type" to rank factor importance.
Main Results:
- Walker use, frequency of being carried, and daycare enrollment age were significantly associated with the age of first walking.
- The "quantification method" identified birth weight, birth order, frequency of being carried, season of birth, walker use, and daycare enrollment age as important factors.
Conclusions:
- Factors such as birth weight, birth order, and physical handling (e.g., being carried) appear to be most influential in determining early walking.
- While walker use and daycare enrollment show statistical significance, their impact relative to other factors requires further investigation.
Abstract:
To clarify the factors that determine the age when walking begins, this study first applied contingency tables and the chi 2 test to the questionnaire-data answered by the parents of 395 children. Among twelve factors, those that were not independent of the age of first walking were the use of a walker (p less than 0.01), the frequency of being carried on the chest (p less than 0.05) and the age of the first enrollment at a day-care center (less than 0.05). Second, this study employed the "quantification method of the second type" to clarify what factors help babies start walking early and what others do not. The subjects were divided into two groups--W0 (early-walkers) and W1 (others)--, and this grouping was used as an external criterion. The order of the factors according to the range of category scores is as follows: (1) birth weight, (2) order of birth, (3) frequency of being carried on the chest, (4) season of birth, (5) use of a walker, (6) age of the first enrollment at a day-care center. These factors included those that were not independent of the age of first walking ((3), (5), (6)). Therefore, the factors that had a wider range seem to be important in determining the age when babies start walking.
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