What factor most commonly contributes to pediatric dosing errors?

• A. Inaccurate weight measurement
• B. Incorrect route of administration
• C. Inaccurate weight measurement or miscalculation of weight-based dose
• D. Lack of parental consent

Answer: (C)

In pediatric dosing, the amount of medicine is almost always calculated based on the child's weight (mg/kg or mL/kg). Because the dose hinges entirely on an accurate weight, the most common errors come from two linked problems: measuring the weight inaccurately and miscalculating the dose from that weight. If the child isn’t weighed on a properly calibrated scale, or if clothing or the child’s position skews the measurement, the weight used in the calculation is wrong. Then, even with the correct weight, mistakes in the math—such as not converting pounds to kilograms, misplacing a decimal, or misapplying a dosing table—produce an incorrect dose. These weight-related measurement and calculation errors lead to underdosing or overdosing more often than other issues. Therefore, ensuring an accurate weight and precise weight-based calculations is the key factor in preventing pediatric dosing errors.