Ventilatory capacity in Nigerian school children

Area of Science:

• Pediatric Pulmonology
• Anthropometry
• Public Health

Background:

• Establishing normative data for lung function is essential for diagnosing respiratory conditions in children.
• Previous studies on lung function reference values have primarily focused on Caucasian populations, with limited data available for African children.
• Understanding anthropometric influences on lung function is key to developing accurate predictive equations.

Purpose of the Study:

• To determine reference values for forced expiratory volume in one second (FEV1.0) and forced vital capacity (FVC) in healthy Nigerian school children.
• To analyze the correlation between lung function parameters (FEV1.0, FVC) and anthropometric variables (age, height, weight, body surface area).
• To develop predictive formulae for FEV1.0 and FVC based on Nigerian children's anthropometric data.

Main Methods:

• Spirometry was performed on 1001 healthy Nigerian school children aged 4–16 years.
• Forced expiratory volume in one second (FEV1.0) and forced vital capacity (FVC) were measured.
• Statistical analysis was conducted to assess correlations with age, height, weight, and body surface area, and to derive median values and percentiles.

Main Results:

• Weight showed the strongest correlation with FEV1.0 in both sexes and FVC in males; height showed the strongest correlation with FVC in females.
• Median FEV1.0 and FVC values were generally lower than those reported for Caucasian children but comparable to existing data for African children.
• Male children exhibited higher median FEV1.0 and FVC values compared to females, particularly at younger ages.

Conclusions:

• This study provides essential normative lung function data (FEV1.0 and FVC) for Nigerian school children.
• Anthropometric variables, particularly weight and height, are significant predictors of lung function in this population.
• The developed formulae offer valuable tools for clinical assessment and epidemiological studies of respiratory health in African children.