CV_ANALYSIS_Thendral_(1)[1]

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CV Analysis

Transcript of CV_ANALYSIS_Thendral_(1)[1]

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CV Analysis

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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.

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CV%Measure of Relative VariationAlways a %Shows Variation Relative to MeanUsed to Compare 2 or More GroupsAllowable %= 5%

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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

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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)

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Formula To Calculate SD,MEAN,CV

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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%

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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%

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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%

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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%

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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%

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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%

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