Which of the following is a child variable?

• A. Chronological and developmental age
• B. Blood pressure reading
• C. Isolation preference
• D. Hospital color palette

Answer: (A)

The main idea here is a child variable—characteristics inherent to the child that shape how they experience hospitalization and respond to care. Age is a prime example because it directly influences what the child understands, how they communicate, and what coping strategies they can use. Looking at both chronological age and developmental age makes sense, because two children of the same age can function at different developmental levels. Developmental age reflects a child’s cognitive, emotional, and social skills, which guides how you explain procedures, what kinds of support they need, and how you tailor play and medical explanations to be meaningful and reassuring.

In contrast, a blood pressure reading is a specific physiologic data point captured at a moment in time, not a stable characteristic of the child. Isolation preference describes a behavior or preference, and the hospital color palette is an environmental factor—neither is a basic child characteristic in the sense of influencing the child’s experience in the same foundational way as age and development.