Altitude and childhood growth

Area of Science:

• Pediatric Nutrition and Growth
• Environmental Health
• Public Health Surveillance

Background:

• Childhood growth is influenced by various factors, including environmental exposures.
• Understanding the impact of geographic factors like altitude on child development is crucial for public health initiatives.

Purpose of the Study:

• To investigate the association between altitude and growth indicators in young children in the United States.
• To determine if higher altitudes are linked to reduced height and weight status in children aged 5 years or younger.

Main Methods:

• Utilized data from the Centers for Disease Control and Prevention's Pediatric Nutrition Surveillance System (1982-1984).
• Analyzed height and weight data for children under five from eight mountain states.
• Employed statistical analysis (ANOVA) to assess the significance of altitude on growth indicators.

Main Results:

• Significant declines in mean birth weight, height-for-age, weight-for-age, and weight-for-height were observed with increasing altitude above 1500 m.
• Growth reductions were consistent across all studied age and birth weight groups.
• The negative impact of altitude on growth persisted even when controlling for birth weight.

Conclusions:

• Altitude is a significant environmental factor associated with reduced childhood growth in the United States.
• Lower birth weight at higher altitudes contributes to growth deficits, but an additional extrauterine growth retardation effect related to altitude is also suggested.
• Findings underscore the need to consider environmental factors in pediatric growth assessments and interventions.