Screening tests can be imperfect and may produce false negatives or false positives.

• A. True
• B. False
• C. They always replace medical evaluation
• D. They guarantee injury prevention

Answer: (A)

Screening tests are designed to flag potential problems, but they are not perfect. A false positive occurs when the test suggests a problem is present when it isn’t, leading to unnecessary follow-up or worry. A false negative happens when the test misses a real issue, giving a false sense of safety. Because of these possible errors, screening results should be interpreted with medical evaluation and clinical judgment; they do not replace medical assessment. They also cannot guarantee injury prevention, since risk factors and injuries can arise from many factors not fully captured by screening. So recognizing that screening tests can be imperfect and produce false negatives or false positives is the correct understanding.