In preschool-age children, bradypnea is defined as:

In preschool-age children, bradypnea is characterized by a reduced respiratory rate compared to normal values for that age group. The normal respiratory rate for preschool children typically ranges from about 20 to 30 breaths per minute. Therefore, a respiratory rate of less than 22 breaths per minute is considered bradypnea for this age range. Recognizing this condition is critical, as it can indicate respiratory distress or other underlying issues. Understanding the appropriate thresholds for respiratory rates helps healthcare providers identify when a child may need further evaluation or intervention. The other thresholds would not accurately reflect the clinical definition for preschool-age children, as they either fall within the normal range or exceed the threshold for bradypnea.