Table 3 Length of 95% CI for the log OR under the null hypothesis (95% CI with 2K − 2 degrees of freedom for BBST, BBCB1 and BBCB2)

2

4.4403

4.3872

3.6847

12.4947

14.1601

2.5465

2.6654

2.6242

2.0261

7.5389

7.7049

1.4191

7.9314

7.7574

6.9888

23.3022

25.3066

4.2315

3

2.4496

2.4603

2.0577

3.4106

4.3827

2.0281

1.4494

1.4500

1.0987

2.0936

2.5054

1.1865

4.2823

4.2821

3.7885

6.3203

6.8549

3.2792

4

1.8850

1.9022

1.5594

2.1652

2.8089

1.7153

1.1225

1.1241

0.8478

1.3430

1.6347

1.0198

3.1821

3.2001

2.8554

3.8901

4.3356

2.7188

5

1.6165

1.6338

1.3294

1.6974

2.1806

1.5158

0.9599

0.9652

0.7283

1.0538

1.2838

0.9046

2.6942

2.7002

2.3815

3.0376

3.3875

2.3956

10

1.0760

1.0796

0.8550

0.9788

1.2340

1.0463

0.6320

0.6351

0.4707

0.6012

0.7326

0.6255

1.7404

1.7336

1.5407

1.7447

1.9143

1.6381