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  2. Quest Diagnostics - Wikipedia

    en.wikipedia.org/wiki/Quest_Diagnostics

    Quest Diagnostics Incorporated is an American clinical laboratory. A Fortune 500 company, Quest operates in the United States , Puerto Rico , Mexico , and Brazil . [ 3 ] Quest also maintains collaborative agreements with various hospitals and clinics across the globe.

  3. External quality assessment - Wikipedia

    en.wikipedia.org/wiki/External_quality_assessment

    The term external refers to the fact that the laboratory's results are assessed by a third party. The most common EQA process is proficiency testing, in which an organization sends samples to a group of different laboratories and results are compared among the group. Retesting of the same sample by different laboratories and on-site visits to ...

  4. Analytical quality control - Wikipedia

    en.wikipedia.org/wiki/Analytical_quality_control

    Constituents submitted to the analytical laboratory must be accurately described to avoid faulty interpretations, approximations, or incorrect results. [2] The qualitative and quantitative data generated from the laboratory can then be used for decision making.

  5. What to Expect from Quest Diagnostics - AOL

    www.aol.com/news/2013-07-15-what-to-expect-from...

    Quest Diagnostics (NYS: DGX) is expected to report Q2 earnings on July 18. Here's what Wall Street wants to see: The 10-second takeaway Comparing the upcoming quarter to the prior-year quarter ...

  6. Laboratory quality control - Wikipedia

    en.wikipedia.org/wiki/Laboratory_quality_control

    Laboratory quality control is designed to detect, reduce, and correct deficiencies in a laboratory's internal analytical process prior to the release of patient results, in order to improve the quality of the results reported by the laboratory.

  7. Positive and negative predictive values - Wikipedia

    en.wikipedia.org/wiki/Positive_and_negative...

    The positive predictive value (PPV), or precision, is defined as = + = where a "true positive" is the event that the test makes a positive prediction, and the subject has a positive result under the gold standard, and a "false positive" is the event that the test makes a positive prediction, and the subject has a negative result under the gold standard.

  8. Diagnostic odds ratio - Wikipedia

    en.wikipedia.org/wiki/Diagnostic_odds_ratio

    The log diagnostic odds ratio is sometimes used in meta-analyses of diagnostic test accuracy studies due to its simplicity (being approximately normally distributed). [ 4 ] Traditional meta-analytic techniques such as inverse-variance weighting can be used to combine log diagnostic odds ratios computed from a number of data sources to produce ...

  9. Quest Diagnostics (DGX) Buys Outreach Lab, Widens ... - AOL

    www.aol.com/news/quest-diagnostics-dgx-buys...

    Mercy's outreach laboratory services are set to get integrated into Quest Diagnostics' (DGX) full-service laboratory in Lenexa, KS. Quest Diagnostics (DGX) Buys Outreach Lab, Widens Midwest Base ...