|
|
|
|
|
|
|
|
|
Coefficient of variation (sd divided by mean times 100)
| Глоссарий по стандартизации, контролю и управлению качеством |
|
|
|
Decision interval, dint, английский
Used here to represent the gray zone, or interval of uncertainty, in interpreting a test result. an example is the ncep (national cholesterol education program) guidelines that indicate a cholesterol of less than or equal to 200 mg/dl is okay and that a value of more than or equal to 240 should have followup testing, which defines a gray zone of 40 mg/dl between 200 to 240, which is 20% at a decision level of 200 mg/dl. dint can also be defined more generally by the change in a test result that is judged to be medically significant.
Cumulative control limits, английский
Control limits calculated from estimates of the mean and standard deviation that represent a time period longer than a month. common practice is for laboratories to calculate monthly control statistics. cumulative statistics can be easily calculated from monthly statistics that tabulate the sum of the individual values and the sum of the squares of those values. see the lesson qc - the calculations for more detailed discussion, equations, and examples.
|
|
|
|
|
|
|
