Determination of reference values for salivary cortisol in healthy infants aged 0-12 months

Anouk Fastman1, Valeria Schmoll2, Christian Boggio Marzet3

  • 1Task Force on Pediatric Gastroenterology and Nutrition. anoukfastman@gmail.com.

Insights

This study established reference values for salivary cortisol in healthy Argentinian infants. Morning salivary cortisol levels in infants aged 0-12 months were measured to provide a baseline for stress assessment.

Area of Science:

  • Pediatric endocrinology
  • Biomarkers
  • Stress physiology

Background:

  • Salivary cortisol is a non-invasive biomarker for pediatric stress.
  • Limited data exists on salivary cortisol use in children, especially reference values for healthy infants in Argentina.
  • Establishing local reference values is crucial for accurate stress assessment in infants.

Purpose of the Study:

  • To determine the reference values for morning salivary cortisol in healthy infants aged 0-12 months in Argentina.
  • To provide a baseline for future pediatric stress studies using salivary cortisol.
  • To validate salivary cortisol as a relevant objective tool for infant stress assessment.

Main Methods:

  • A descriptive, cross-sectional study was conducted with 140 healthy infants aged 0-12 months.
  • Morning saliva samples (8-9 a.m.) were collected from fasting infants between March 2017 and March 2018.
  • Salivary cortisol levels were measured using electrochemiluminescence and reported as mean and standard deviation.

Main Results:

  • A total of 96 samples were analyzed, yielding mean morning salivary cortisol levels of 5.46 nmol/L (SD: 2.15).
  • No significant correlation was found between salivary cortisol levels and age, sex, gestational age, birth weight, delivery type, or feeding type.
  • The established reference range did not require division by age groups.

Conclusions:

  • The study reports the reference range for morning salivary cortisol in healthy infants aged 0-12 months in Argentina.
  • These findings provide essential reference values for using salivary cortisol as a stress biomarker in this population.
  • Salivary cortisol is confirmed as a valuable, non-invasive tool for assessing stress in infants.
Abstract

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