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CV_ANALYSIS_Thendral_(1)[1]
Transcript of CV_ANALYSIS_Thendral_(1)[1]
CV Analysis
Coefficient of Variation (CV) Coefficient of Variation (CV) –
A measurement of
imprecision (random error), biologic variation, or other variability in a clinical parameters, population; mathematically.
CV%Measure of Relative VariationAlways a %Shows Variation Relative to MeanUsed to Compare 2 or More GroupsAllowable %= 5%
CV% Calculation The Coefficient of Variation [CV] is the ratio of the standard
deviation to the mean and is expressed as a percentage.
CV=SD/MEAN
Other names: VIS - CMC Z-Score – Bio Rad
Z-Score? Z-Score is a statistical measurement of
a score's relationship to the mean in a group of scores. (Peer group, methodology, instrument)
Formula To Calculate SD,MEAN,CV
August month CV Comparison for the centers
Centers
Glucose Urea Creatinine TGL Average
CV% CV% CV% CV% CV%
T.NAGAR 5.20% 6.20% 2.70% 2.80% 4.23%
PALLAVA 2.30% 7.40% 6.10% 5.20% 5.25%
HANDE 3.80% 7.60% 7.20% 17.10% 8.93%
DEEPAM 3.47% 4.27% 4.15% 5.11% 4.25%
T.NAG
AR
PALLA
VAHAN
DE
DEEPA
M0.00%1.00%2.00%3.00%4.00%5.00%6.00% 5.20%
2.30%
3.80% 3.47%
Glucose CV%
Glucose CV%
Centres
Glucose CV%
T.NAG
AR
PALLA
VAHAN
DE
DEEPA
M0.00%1.00%2.00%3.00%4.00%5.00%6.00%7.00%8.00%
6.20%7.40% 7.60%
4.27%
Urea CV%
Urea CV%
Centres
Urea CV%
T.NAG
AR
PALLA
VAHAN
DE
DEEPA
M0.00%1.00%2.00%3.00%4.00%5.00%6.00%7.00%8.00%
2.70%
6.10%7.20%
4.15%
Creatinine CV%
Creatinine CV%
Centres
Creatine CV%
T.NAG
AR
PALLA
VAHAN
DE
DEEPA
M0.00%2.00%4.00%6.00%8.00%
10.00%12.00%14.00%16.00%18.00%
2.80%5.20%
17.10%
5.11%
TGL CV%
TGL CV%
Centres
TGL CV%
T.NAG
AR
PALLA
VAHAN
DE
DEEPA
M0.00%1.00%2.00%3.00%4.00%5.00%6.00%7.00%8.00%9.00%
4.23%5.25%
8.92%
4.25%
Average CV%
Average CV%
Centres
Average CV%