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  2. Reference ranges for blood tests - Wikipedia

    en.wikipedia.org/wiki/Reference_ranges_for_blood...

    5.0, [5] [14] [15] 5.1: mmol/L or mEq/L [14] See hypokalemia or hyperkalemia: 14 [17] 20 [17] mg/dL Chloride (Cl) 95, [14] 98, [18] 100 [5] 105, [14] 106, [18] 110 [5] mmol/L or mEq/L [14] See hypochloremia or hyperchloremia: 340 [19] 370 [19] mg/dL Ionized calcium (Ca) 1.03, [20] 1.10 [5] 1.23, [20] 1.30 [5] mmol/L: See hypocalcaemia or ...

  3. Internal consistency - Wikipedia

    en.wikipedia.org/wiki/Internal_consistency

    Note further that Cronbach's alpha is necessarily higher for tests measuring more narrow constructs, and lower when more generic, broad constructs are measured. This phenomenon, along with a number of other reasons, argue against using objective cut-off values for internal consistency measures. [ 4 ]

  4. Cronbach's alpha - Wikipedia

    en.wikipedia.org/wiki/Cronbach's_alpha

    Cronbach's alpha (Cronbach's ), also known as tau-equivalent reliability or coefficient alpha (coefficient ), is a reliability coefficient and a measure of the internal consistency of tests and measures. [1] [2] [3] It was named after the American psychologist Lee Cronbach.

  5. Reference range - Wikipedia

    en.wikipedia.org/wiki/Reference_range

    The standard definition of a reference range for a particular measurement is defined as the interval between which 95% of values of a reference population fall into, in such a way that 2.5% of the time a value will be less than the lower limit of this interval, and 2.5% of the time it will be larger than the upper limit of this interval, whatever the distribution of these values.

  6. Coronary CT calcium scan - Wikipedia

    en.wikipedia.org/wiki/Coronary_CT_calcium_scan

    Lesion specific calcium score. The Agatston score, named after its developer Arthur Agatston, is a measure of calcium on a coronary CT calcium scan. [7] The original work, published in 1990, [8] was based on electron beam computed tomography (also known as ultrafast CT or EBCT). The score is calculated using a weighted value assigned to the ...

  7. Sample size determination - Wikipedia

    en.wikipedia.org/wiki/Sample_size_determination

    The table shown on the right can be used in a two-sample t-test to estimate the sample sizes of an experimental group and a control group that are of equal size, that is, the total number of individuals in the trial is twice that of the number given, and the desired significance level is 0.05. [4]

  8. Procalcitonin - Wikipedia

    en.wikipedia.org/wiki/Procalcitonin

    0.1-0. 5 PCT reduces antibiotic exposure without adverse outcomes in the ED [26] [27] COPD exacerbation: RCT 0.1-0. 5 PCT reduces antibiotic exposure without adverse outcomes in the ED and hospital [26] [27] [28] Endocarditis: observational 2.3 PCT is an independent predictor with high diagnostic accuracy for acute endocarditis [29] [30]

  9. Calcium alpha-ketoglutarate - Wikipedia

    en.wikipedia.org/wiki/Calcium_alpha-ketoglutarate

    Calcium-alpha-ketoglutarate (C 5 H 4 CaO 5 •H 2 O) is a special form mineral calcium that can be used to restore calcium concentration level in the blood back to normal. Calcium-alpha-ketoglutarate binds excess phosphate and pass it as a waste, re-establishing normal balance of calcium and phosphate in the body.