Youngmee Ahn; Min Sohn; Sangmi Lee

doi:10.4040/jkan.2011.41.5.613

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Original Article
Growth Patterns of Premature Infants Up to 40th Term Week of Corrected Age: Youngmee Ahn, Min Sohn, Sangmi Lee; Journal of Korean Academy of Nursing 2011;41(5):613-622.
DOI: https://doi.org/10.4040/jkan.2011.41.5.613
Published online: October 31, 2011

¹Professor, Department of Nursing, Inha University, Incheon, Korea.

²Doctoral Student, Department of Nursing, Graduate School, Inha University, Incheon, Korea.

Address reprint requests to: Ahn, Youngmee. Department of Nursing, College of Medicine Inha University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Korea. Tel: +82-32-860-8207, Fax: +82-32-874-5880, aym@inha.ac.kr

• Received: December 18, 2010 • Accepted: October 24, 2011

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Abstract
NOTES
REFERENCES

Abstract

Purpose
Study purpose were to describe growth patterns of premature infants in weight, length and head circumference from birth to 40th week of corrected ages (CA) and to explore factors affecting patterns.
Methods
A longitudinal descriptive study was conducted with 267 premature infants. They were categorized into 2 groups; GA group with measurements at birth and the CA group with measurements at CA, which was categorized into 3 groups (group 1-3) by WHO guideline for gestational age (GA) at birth.
Results
GA group presented greater measures in all than CA group at same week of life. Among CA groups, group 3 showed the highest measurements, up to 37 weeks of life, though this disappeared at 38-40 weeks. Reversely, group 1 revealed the highest growth rates in all measures, followed by group 2 and group 3. Significant interaction was observed in all measures between week of life and any type of groups.
Conclusion
Higher measures in GA group, as well group 3 among CA groups, supported the superiority of intra-uterine environment overriding quality of regimen from NICU. Regardless of growth acceleration, smaller infants remain smaller, indicating that intra-uterine thrifty phenotype may continue at least up to the 40th week of CA.
Keywords: Premature infants; Gestational age; Growth; Body weights and measures

This work was supported by a Korea Research Foundation Grant funded by the Korean Government (MOEHRD, Basic Research Promotion Fund) (KRF-2008-531-E00087).

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Figure 1

Variations in mean body weight by corrected age and mother/child characteristics.

Figure 2

Variations in mean body length by corrected age and mother/child characteristics.

Table 1

Weight and related Growth Rate of the Infants by Week of Life (N=267)

SD=Standard deviation; NA=Not applicable; GA=Gestational age; CA=Corrected age.

Table 2

Body Length and related Growth Rate of the Infants by Week of Life (N=267)

SD=Standard deviation; NA=Not applicable; GA=Gestational age; CA=Corrected age.

Table 3

Head Circumference (HC) and related Growth Rate of the Infants by Week of Life (N=267)

SD=Standard deviation; NA=Not applicable; GA=Gestational age; CA=Corrected age.

Table 4

Differences in Weight, Length and Head Circumference (HC) by Conditions at Birth

SD=Standard deviation; GA=Gestational age.

Figure & Data

REFERENCES

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Growth Patterns of Premature Infants Up to 40th Term Week of Corrected Age

J Korean Acad Nurs. 2011;41(5):613-622. Published online October 31, 2011

DOI: https://doi.org/10.4040/jkan.2011.41.5.613

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Figure

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Growth Patterns of Premature Infants Up to 40th Term Week of Corrected Age

Figure 1 Variations in mean body weight by corrected age and mother/child characteristics.

Figure 2 Variations in mean body length by corrected age and mother/child characteristics.

Figure 1

Figure 2

Growth Patterns of Premature Infants Up to 40th Term Week of Corrected Age

Table 1

Weight and related Growth Rate of the Infants by Week of Life (N=267)

SD=Standard deviation; NA=Not applicable; GA=Gestational age; CA=Corrected age.

Table 2

Body Length and related Growth Rate of the Infants by Week of Life (N=267)

SD=Standard deviation; NA=Not applicable; GA=Gestational age; CA=Corrected age.

Table 3

Head Circumference (HC) and related Growth Rate of the Infants by Week of Life (N=267)

SD=Standard deviation; NA=Not applicable; GA=Gestational age; CA=Corrected age.

Table 4

Differences in Weight, Length and Head Circumference (HC) by Conditions at Birth

SD=Standard deviation; GA=Gestational age.

Table 1 Weight and related Growth Rate of the Infants by Week of Life (N=267)

SD=Standard deviation; NA=Not applicable; GA=Gestational age; CA=Corrected age.

Table 2 Body Length and related Growth Rate of the Infants by Week of Life (N=267)

SD=Standard deviation; NA=Not applicable; GA=Gestational age; CA=Corrected age.

Table 3 Head Circumference (HC) and related Growth Rate of the Infants by Week of Life (N=267)

SD=Standard deviation; NA=Not applicable; GA=Gestational age; CA=Corrected age.

Table 4 Differences in Weight, Length and Head Circumference (HC) by Conditions at Birth