Table 10 t values of independent t-tests on the protective effects between samples (α = 0.05)

1.209

5.328**

3.359*

5.116**

3.071*

− 0.860

3.854*

2.649

0.386

0.751

1.194

− 0.074

− 3.743*

− 3.458*

− 2.817*

2.214

0.932

− 2.218

− 1.879

− 1.838

1.052

1.330

− 0.420

− 9.524**

− 11.630***

− 3.799*

− 0.353

− 1.765

5.234**

3.477*

0.634

1.312

− 0.008

3.809*

2.433

7.098**

1.280

0.324

− 2.007

− 1.754

− 1.876

0.391

− 0.411

0.678

− 0.695

− 3.835**

− 3.866**

− 2.143

− 1.813

0.397

− 2.297

− 1.965

0.534

0.060

− 1.807

− 1.394

1.532

0.674

0.671

− 1.584

− 1.143

1.743

0.828

0.840

0.196

− 1.438

− 0.942

2.351

1.103

1.153

0.500

0.284

− 3.410**

− 3.231*

− 0.245

− 0.518

− 0.647

− 1.496

− 1.679

− 2.137

− 3.269*

− 3.095*

0.213

− 0.243

− 0.349

− 1.221

− 1.418

− 1.898

− 1.844

− 6.317***

− 4.607***

− 6.437***

− 4.578***

0.474

− 6.420***

− 4.220**

1.849

1.516

− 6.458***

− 4.200**

2.049

1.756

0.305

− 5.259***

− 3.326**

1.818

1.498

0.352

0.184

− 5.734***

− 3.648**

1.987

1.682

0.435

0.234

0.000

− 6.792***

− 5.056***

− 0.332

− 0.854

− 2.371*

− 2.599*

− 2.246*

− 2.470*

− 4.496***

− 2.957**

1.039

0.708

− 0.229

− 0.350

− 0.411

− 0.437

2.364

25.000**

9.558**

10.053**

5.173**

− 3.871*

6.175**

3.974*

− 1.562

0.400

16.853***

6.391**

− 9.460**

0.088

− 0.394

17.857***

5.917**

− 21.762***

− 0.795

− 0.858

− 2.335

15.282***

4.630*

− 31.891***

− 2.455

− 1.711

− 6.847**

− 11.191***

11.688***

6.064**

− 2.922*

0.863

0.139

1.087

2.116

3.912*

13.443***

5.687**

− 6.956*

− 0.328

− 0.617

− 0.683

0.692

3.473*