BS Nursing Epidemiology
nmdcat.online June 6, 2026

119. A randomized controlled trial for a new drug reports a significant effect, but the allocation sequence was not truly random, and investigators knew which patients received which treatment. What critical type of bias is likely introduced?

A. Recall bias.
B. Information bias.
C. Selection bias.
D. Observer bias.

📖 Additional Information

  • Recall bias.
  • Information bias.
  • Selection bias.
  • Observer bias.

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