Lung function and cognitive ability in children: a UK birth cohort study.

Area of Science:

• Pediatric Health
• Neuroscience
• Respiratory Medicine

Background:

• Decreased lung function in adults is linked to cognitive impairment.
• Childhood cognitive ability significantly influences adult outcomes like socioeconomic status and mortality.
• Limited data exists on the early-life relationship between lung function and cognition.

Purpose of the Study:

• To investigate the longitudinal association between childhood lung function and cognitive ability.
• To determine if reduced lung function in children predicts future cognitive decline.

Main Methods:

• Lung function (FEV1, FVC) and cognitive ability (WISC-III, WASI) were measured in children aged 8 and 15.
• Data from the Avon Longitudinal Study of Parents and Children was analyzed.
• Multivariable linear models adjusted for confounders like birth factors, smoking, socioeconomic status, and air pollution.

Main Results:

• Reduced forced vital capacity (FVC) at age 8 was associated with lower full-scale IQ at ages 8 and 15.
• Forced expiratory volume in one second (FEV1) showed no significant association with cognitive ability after adjustment.
• No association was found between lung function parameters and the change in cognitive ability between ages 8 and 15.

Conclusions:

• Reduced FVC, not FEV1, is independently associated with lower cognitive ability in children.
• The association between FVC and cognition is of low magnitude and attenuates with age.
• Results suggest a potential shared genetic or environmental risk rather than direct causation between FVC and cognition across the life course.