Table 6 Relationships between the explanatory variables and telemedicine use for the three samples of physicians

Spain

  Perceived usefulness of ICTS in clinical practice

0.200

0.445

0.202

1

0.653

1.222

  Ease-of-use of ICTS in clinical practice

0.667

0.364

3.354

1

0.067

1.948

  Optimism

−0.498

0.437

1.302

1

0.254

0.607

  Propensity to innovate

0.724

0.373

3.769

1

0.052

2.062

  Level of ICT use

2.661

1.077

6.103

1

0.013

14.316

  Constant

0.724

0.373

3.769

1

0.052

2.062

  Chi-square, 24.859; significant, 0.000

  Hosmer-Lemeshow test, 19.273; significant, 0.018

  Nagelkerke R Square, 0.275

Colombia

  Perceived usefulness of ICTS in clinical practice

−0.192

0.253

0.575

1

0.448

0.826

  Ease-of-use of ICTS in clinical practice

0.108

0.182

0.347

1

0.556

1.113

  Optimism

0.485

0.269

3.254

1

0.071

1.624

  Propensity to innovate

0.361

0.232

2.423

1

0.120

1.435

  Level of ICT use

1.212

0.511

5.626

1

0.018

3.360

  Constant

−2.878

0.951

9.163

1

0.002

0.056

  Chi-square, 14.489; significant, 0.013

  Hosmer-Lemeshow test, 14.564; significant, 0.045

  Nagelkerke R Square, 0.161

Bolivia

  Perceived usefulness of ICTS in clinical practice

0.131

0.141

0.866

1

0.352

1.140

  Ease-of-use of ICTS in clinical practice

0.321

0.256

1.571

1

0.210

1.379

  Optimism

0.484

0.150

10.371

1

0.001

1.622

  Propensity to innovate

0.033

0.189

0.031

1

0.861

1.034

  Level of ICT use

2.040

1.049

3.780

1

0.052

7.689

  Constant

-2.224

1.375

2.618

1

0.106

0.108

  Chi-square, 20.704; significant, 0.000

  Hosmer-Lemeshow test, 14.705; significant, 0.072

  Nagelkerke R Square, 0.197