A cross‐sectional study finds that skull fracture is related to hyperactivity.This finding implies that
A)hyperactivity increases the risk of head injury
B)head injury increases the risk of developing hyperactivity
C)other factors increase the risk of both head injury and hyperactivity
D)any of the above may be true

Question

Quizplus · Accepted Answer

Cross-sectional studies can show associations between variables but cannot determine causation. Therefore, any of the interpretations (A, B, or C) could be possible based on this type of study.

A Cross‐sectional Study Finds That Skull Fracture Is Related to Hyperactivity.This