Peak flow readings can vary based on age, height, and sex. They are often compared to the child's personal best, which is the highest peak flow number recorded when the child is in good health. The readings are typically categorized into three zones:
Green Zone: 80-100% of the personal best. Indicates good control of asthma. Yellow Zone: 50-79% of the personal best. Signals caution and the need to adjust medications or treatment. Red Zone: Below 50% of the personal best. Indicates a medical alert, and immediate action is necessary.
