单词	false positive
释义	false positive noun plural false positives : a person or test result that is incorrectly classified as positive (as for the presence of a health condition) because of imperfect testing methods or procedures A false positive—a test result indicative of disease that isn't actually present—can trigger a chain reaction of worry, further tests, and even unnecessary treatment. Harvard Health Letter The quarantine could be lifted early if the lab confirms that the case was a false positive. Kathleen Moore Perhaps more important, polygraph tests are notoriously unreliable. Scientists are understandably concerned about false positive results … Chemical & Engineering News —often hyphenated when used before another noun The technology could improve a radiologist's ability to detect breast cancers and it could lower the number of false-positive results … Laurie Tarken compare false negative Word History First Known Use 1912, in the meaning defined above Medical Definition false positive noun : a person or test result that is incorrectly classified as positive (as for the presence of a health condition) because of imperfect testing methods or procedures Another problem with the test … is that it also produces a number of false positives; that is, a number of neonates with elevated trypsin levels the first time they are tested are found not to have elevated levels on the second test. The Journal of the American Medical Association The urine dipstick test for protein can give false positive results when various pharmacologic agents and gross hematuria are present or when urine pH is high … Biff F. Palmer, Scientific American Medicine —often hyphenated when used before another noun … false-positive results that led healthy women to have unnecessary surgery. Denise Grady, The New York TimesThe test can give false-positive readings, however, and it triggers a follow-up colonoscopy in 4% to 10% of cases. Marilyn Chase, The Wall Street Journal compare false negative
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