A study of errors that can occur when weighing infants

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L Alsop-Shields1, H Alexander

  • 1Mater Children's Hospital, Brisbane, Queensland, Australia.

Journal of Advanced Nursing
|March 1, 1997
PubMed

Insights

Infant weight measurements at clinics can be inaccurate. To ensure reliable tracking of infant welfare, babies under nine months should be weighed at least a fortnight apart, and older infants a month apart.

Area of Science:

  • Pediatrics
  • Child Health Monitoring

Background:

  • Infant weight change is a key indicator of child welfare at well-baby clinics.
  • Current weight measurement practices are known to be prone to significant error.
  • Nurses use weight as a rough indicator, acknowledging its limitations.

Purpose of the Study:

  • To quantify measurement errors in infant weight.
  • To differentiate measurement error from biological weight variation.
  • To establish optimal weighing intervals for accurate infant monitoring.

Main Methods:

  • Repeated infant weight measurements were conducted.
  • Statistical analysis was used to calculate error margins.
  • Biological variation in infant weight was also assessed.

Main Results:

  • Measurement errors were quantified in repeated infant weight tests.
  • The study identified the extent of error affecting weight change detection.
  • Detected weight changes can be smaller than the inherent measurement error.

Conclusions:

  • Recommended weighing intervals: at least a fortnight for infants under nine months.
  • Recommended weighing intervals: at least one month for older infants.
  • More frequent weighing may yield unreliable data due to measurement error.

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