A new blood pressure monitor gives highly variable readings when the same individual's blood pressure is measured repeatedly under the same conditions. This test lacks:

• A Validity
• B Specificity
• C Sensitivity
• D Reliability ✓

Explanation

Reliability, also known as precision, refers to the consistency or reproducibility of a test when repeated under the same conditions. Highly variable readings indicate poor reliability. Validity, or accuracy, refers to how well the test measures what it is supposed to measure, which is determined by sensitivity and specificity. A test can be reliable but not valid, but it cannot be valid without being reliable.

Reference: Park's Textbook of Preventive and Social Medicine, 26th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.