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Table 5 Correlation between different LDL-C calcuation methods in terms of age

From: Comparison common equations for LDL-C calculation with direct assay and developing a novel formula in Iranian children and adolescents: the CASPIAN V study

   

Ahmadi LDL

Friedwald LDL

Direct LDL

TG

TC

HDL

Anandraja LDL

Chen LDL

New formula

Age

7–10

Ahmadi LDL

1

0.576

0.562

0.865

0.691

−0.145

0.440

0.699

0.576

Friedwald LDL

0.576

1

0.977

0.090

0.913

0.176

0.924

0.980

0.994

Direct LDL

0.562

0.977

1

0.090

0.913

0.176

0.924

0.980

0.974

TG

0.865

0.090

0.088

1

0.291

−0.270

−0.022

0.254

0.095

TC

0.691

0.913

0.896

0.291

1

0.420

0.950

0.938

0.923

HDL

−0.145

0.176

0.179

−0.270

0.420

1

0.527

0.122

0.186

Anandraja LDL

0.440

0.924

0.908

−0.022

0.950

0.527

1

0.897

0.933

Chen LDL

0.699

0.980

0.960

0.254

0.938

0.122

0.897

1

0.987

New formula

0.576

0.994

0.974

0.095

0.923

0.186

0.933

0.987

1

11–14

Ahmadi LDL

1

0.559

0.545

0.884

0.691

−0.173

0.416

0.691

0.557

Friedwald LDL

0.559

1

0.985

0.107

0.901

0.131

0.917

0.975

0.991

Direct LDL

0.545

0.985

1

0.099

0.891

0.133

0.908

0.963

0.980

TG

0.884

0.107

0.099

1

0.329

−0.267

−0.009

0.282

0.113

TC

0.691

0.901

0.891

0.329

1

0.380

0.941

0.933

0.914

HDL

−0.173

0.131

0.133

−0.267

0.380

1

0.498

0.070

0.137

Anandraja LDL

0.416

0.917

0.908

−0.009

0.941

0.498

1

0.887

0.927

Chen LDL

0.691

0.975

0.963

0.282

0.933

0.070

0.887

1

0.985

New formula

0.557

0.991

0.980

0.113

0.914

0.137

0.927

0.985

1

15–18

Ahmadi LDL

1

0.568

0.557

0.879

0.714

−0.146

0.443

0.704

0.571

Friedwald LDL

0.568

1

0.987

0.107

0.909

0.141

0.929

0.984

1.00

Direct LDL

0.557

0.987

1

0.101

0.900

0.152

0.921

0.971

0.987

TG

0.879

0.107

0.101

1

0.342

−0.241

0.003

0.280

0.110

TC

0.714

0.909

0.900

0.342

1

0.387

0.941

0.938

0.915

HDL

−0.146

0.141

0.152

−0.241

0.387

1

0.498

0.094

0.156

Anandraja LDL

0.443

0.929

0.921

0.003

0.941

0.498

1

0.897

0.934

LDL-Chen

0.704

0.984

0.971

0.280

0.938

0.094

0.897

1

0.985

New formula

0.571

1.00

0.987

0.110

0.915

0.156

0.934

0.985

1

Total

Ahmadi LDL

1

0.566

0.553

0.876

0.697

−0.157

0.430

0.696

0.566

Friedwald LDL

0.566

1

0.982

0.101

0.907

0.149

0.922

0.979

0.994

Direct LDL

0.553

0.982

1

0.096

0.894

0.155

0.910

0.963

0.978

TG

0.876

0.101

0.096

1

0.319

−0.262

−0.011

0.272

0.106

TC

0.697

0.907

0.894

0.319

1

0.396

0.944

0.936

0.917

HDL

−0.157

0.149

0.155

−0.262

0.396

1

0.509

0.094

0.159

Anandraja LDL

0.430

0.922

0.910

0.011

0.944

0.509

1

0.893

0.931

Chen LDL

0.696

0.979

0.963

0.272

0.936

0.094

0.893

1

0.986

New formula

0.566

0.994

0.978

0.106

0.917

0.159

0.931

0.986

1