Table 1 The estimated cut-off value of various centiles across ages

2.81975

3.50425

7.54972

16.2655

20.2139

2.51792

3.14896

6.93721

15.2828

19.113

2.24839

2.82969

6.3744

14.3595

18.072

2.00772

2.5428

5.85725

13.492

17.0877

1.79281

2.28499

5.38205

12.6769

16.1571

1.6009

2.05332

4.94541

11.911

15.2771

1.42953

1.84514

4.54419

11.1914

14.445

1.27651

1.65806

4.17552

10.5153

13.6583

1.13987

1.48995

3.83677

9.88

12.9144

1.01786

1.33889

3.52549

9.2831

12.211

0.9089

1.20314

3.23947

8.7223

11.546

0.81161

1.08116

2.97665

8.1954

10.9171

0.72473

0.97154

2.73516

7.7002

10.3225

0.64716

0.87304

2.51326

7.235

9.7603

0.57788

0.78452

2.30936

6.7979

9.2287

0.51603

0.70498

2.122

6.3872

8.7261

0.46079

0.63351

1.94985

6.0014

8.2509

0.41146

0.56928

1.79166

5.6388

7.8015

0.36742

0.51156

1.6463

5.2981

7.3766

0.32809

0.45969

1.51274

4.9781

6.9748

0.29297

0.41308

1.39001

4.6773

6.5949

0.26161

0.3712

1.27724

4.3947

6.2358

0.23361

0.33357

1.17362

4.1292

5.8961

0.2086

0.29975

1.0784

3.8798

5.575

0.18627

0.26936

0.99091

3.6454

5.2714

0.16633

0.24205

0.91052

3.4251

4.9843

0.14853

0.21751

0.83665

3.2182

4.7128

0.13263

0.19545

0.76877

3.0238

4.4561

0.11843

0.17564

0.7064

2.8411

4.2134

0.10575

0.15783

0.64909

2.6695

3.9839

0.09443

0.14183

0.59643

2.5082

3.767