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Procalcitonin (PCT) is a peptide precursor of the hormone calcitonin, the latter being involved with calcium homeostasis.It arises once preprocalcitonin is cleaved by endopeptidase. [1]
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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.
Spaces within a formula must be directly managed (for example by including explicit hair or thin spaces). Variable names must be italicized explicitly, and superscripts and subscripts must use an explicit tag or template. Except for short formulas, the source of a formula typically has more markup overhead and can be difficult to read.
The environmental lapse rate (ELR), is the actual rate of decrease of temperature with altitude in the atmosphere at a given time and location. [6]The ELR is the observed lapse rate, and is to be distinguished from the adiabatic lapse rate which is a theoretical construct.
In the case of diagnosing hyperprolactinaemia, a weak positive line can often lead to a false negative result and increase the risk of misdiagnosis of the condition or a potential pituitary adenomas. If Hook Effect is suspected in the patient diagnosis, serial dilution of the analyte until the concentration of prolactin falls within the assay's ...
For the United States, with a standard maximum unbalanced superelevation of 75 mm (3 in), the formula is this: v m a x = E a + 3 0.00066 d {\displaystyle v_{max}={\sqrt {\frac {E_{a}+3}{0.00066d}}}} where E a {\displaystyle E_{a}} is the superelevation in inches, d {\displaystyle d} is the curvature of the track in degrees per 100 feet, and v m ...